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Fowler EA, Bell K, Burns K, Chiazzese A, DeSerres SA, Foster BJ, Hartwig S, Herrington G, James MT, Jensen V, Jones N, Kidston S, Lemay S, Levin A, MacPhee A, McCutcheon S, Ravani P, Samuel S, Scholey J, Takano T, Tangri N, Verdin N, Alexander RT, Clase CM. Involving Patient Partners in the KRESCENT Peer Review: Intent, Process, Challenges, and Opportunities. Can J Kidney Health Dis 2022; 9:20543581221136402. [DOI: 10.1177/20543581221136402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 09/26/2022] [Indexed: 11/16/2022] Open
Abstract
Purpose of review: The Kidney Research Scientist Core Education and National Training (KRESCENT) is a national Canadian training program for kidney scientists, funded by the Kidney Foundation of Canada (KFOC), the Canadian Institutes of Health Research (CIHR), and the Canadian Society of Nephrology (CSN). We describe our first year of incorporating patient partners into a scientific peer-review committee, the 2017 committee to select senior research trainees and early-career kidney researchers for funding and training, in the hope that it will be helpful to others who wish to integrate the perspective of people with lived experience into the peer-review process. Sources of information: Other peer-review committees, websites, journal articles, patient partners, Kidney Foundation of Canada Research Council, Canadians Seeking Solutions and Innovations to Overcome Chronic Kidney Disease (Can-SOLVE CKD) Patient Council, participants in the 2017 Kidney Foundation of Canada KRESCENT peer-review panel. Methods: We describe our motivation, rationale, guiding principles, plans, feedback, implementation, and response. Key findings: We disseminated a “call for patient partners” 8 weeks before the meeting, seeking patients or their care givers to partner with the KRESCENT peer-review panel; we defined these people with lived experience of kidney disease as patient partners. Eight patient partners came forward and all participated as reviewers. Patient partners first participated in a webinar to learn about the function, structure, and processes of a peer-review committee. They practiced reviewing plain language summaries and giving feedback. In a subsequent teleconference, they shared and discussed their reviews. Plain language summaries were scored, overall, on the same 0-5 quality scale used by scientific reviewers. Three patient reviewers participated in some or all of the 6-hour meeting, which was conducted as usual, for this panel, by teleconference (initially audio only; from 2020 onwards by videoconference). In the meeting, the 2 assigned scientific reviewers first gave their scores, followed by the patient reviewers giving their scores, and discussion (mostly scientific, and conducted in usual scientific language). Scientific reviewers then negotiated a consensus score based on their initial scores, the discussion, patient reviewers’ scores and statements, and the scientific officer’s notes. Patient reviewers, scientific reviewers, and the Kidney Foundation of Canada (KFOC) were generally positive about the process. The increased length of the meeting (estimated at 1 hour) was generally thought to be acceptable. Patient reviewers also provided feedback on the methods used to incorporate patients into the research under review. These comments were concrete, insightful, and helpful. The patients did not uniformly recommend that basic scientists involve patients in their work. We did not detect bias against preclinical science, work that did not involve patients, or rarer diseases. Some patients found participation inspiring and enlightening. All participants appreciated the idea of patient partners as community witnesses to a group process committed to fairness and supportiveness. We discussed assigning formal meaningful weight to patient reviewers’ assessments. Most, but not all, patients thought that the scientific reviewers were ultimately the best judges of the allocation of scarce research resources. Limitations: Patient participants tended to be Caucasian, middle class, and well educated. Because of the difficulties of travel for some people living with or supporting those living with kidney disease, our findings may not generalize fully to peer-review meetings that are conducted face to face. This is explicitly a supportive panel, committed to reviewing junior scientists with kindness as well as rigor; our findings may not generalize to panels conducted differently. We did not use formal qualitative methodology. Implications: Inclusion of patient partners as patient reviewers for the KRESCENT program peer-review panel was feasible, added value for scientific and patient reviewers, and for the funding stakeholders (CIHR, KFOC, and CSN). We were glad that we had taken this step and continue to refine the process with each successive competition.
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Affiliation(s)
| | - Karin Bell
- Patient Partner and Member of Canadians Seeking Solutions and Innovations to Overcome Chronic Kidney Disease (Can-SOLVE CKD), Vancouver, BC, Canada
| | - Kevin Burns
- University of Ottawa and the Ottawa Hospital, ON, Canada
| | - Angela Chiazzese
- Patient Partner and Member of Canadians Seeking Solutions and Innovations to Overcome Chronic Kidney Disease (Can-SOLVE CKD), Vancouver, BC, Canada
| | | | | | - Sunny Hartwig
- Department of Biomedical Sciences, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, Canada
| | - Gwen Herrington
- Patient Partner and Member of Canadians Seeking Solutions and Innovations to Overcome Chronic Kidney Disease (Can-SOLVE CKD), Vancouver, BC, Canada
| | | | | | | | - Sandi Kidston
- Patient Partner and Member of Canadians Seeking Solutions and Innovations to Overcome Chronic Kidney Disease (Can-SOLVE CKD), Vancouver, BC, Canada
| | - Serge Lemay
- McGill University Health Centre, Montreal, QC, Canada
| | - Adeera Levin
- The University of British Columbia, Vancouver, Canada
| | - Anne MacPhee
- Patient Partner and Member of Canadians Seeking Solutions and Innovations to Overcome Chronic Kidney Disease (Can-SOLVE CKD), Vancouver, BC, Canada
| | - Shanda McCutcheon
- Patient Partner and Member of Canadians Seeking Solutions and Innovations to Overcome Chronic Kidney Disease (Can-SOLVE CKD), Vancouver, BC, Canada
| | | | | | | | - Tomoko Takano
- McGill University Health Centre, Montreal, QC, Canada
| | | | - Nancy Verdin
- Patient Partner and Member of Canadians Seeking Solutions and Innovations to Overcome Chronic Kidney Disease (Can-SOLVE CKD), Vancouver, BC, Canada
| | | | - Catherine M. Clase
- Departments of Medicine and Health Research Methods, Evidence and Impact, St Joseph’s Healthcare Hamilton, McMaster University, Hamilton, ON, Canada
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Bitter M, Pablant N, Hill KW, Gao L, Kraus B, Efthimion PC, Delgado-Apericio L, Stratton B, Schneider M, Coppari F, Kauffman R, MacDonald MJ, MacPhee A, Ping Y, Stoupin S, Thorn D. A new class of focusing crystal shapes for Bragg spectroscopy of small, point-like, x-ray sources in laser produced plasmas. Rev Sci Instrum 2021; 92:043531. [PMID: 34243385 DOI: 10.1063/5.0043599] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Accepted: 03/22/2021] [Indexed: 06/13/2023]
Abstract
This paper describes a new class of focusing crystal forms for the x-ray Bragg crystal spectroscopy of small, point-like, x-ray sources. These new crystal forms are designed with the aid of sinusoidal spirals, a family of curves, whose shapes are defined by only one parameter, which can assume any real value. The potential of the sinusoidal spirals for the design x-ray crystal spectrometers is demonstrated with the design of a toroidally bent crystal of varying major and minor radii for measurements of the extended x-ray absorption fine structure near the Ta-L3 absorption edge at the National Ignition Facility.
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Affiliation(s)
- M Bitter
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - N Pablant
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - K W Hill
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - Lan Gao
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - B Kraus
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - P C Efthimion
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | | | - B Stratton
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - M Schneider
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - F Coppari
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Kauffman
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M J MacDonald
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A MacPhee
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - Y Ping
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Stoupin
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Thorn
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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3
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Williams GJ, Link A, Sherlock M, Alessi DA, Bowers M, Golick BP, Hamamoto M, Hermann MR, Kalantar D, LaFortune KN, Mackinnon AJ, MacPhee A, Manuel MJE, Martinez D, Mauldin M, Pelz L, Prantil M, Quinn M, Remington B, Sigurdsson R, Wegner P, Youngblood K, Chen H. Order-of-magnitude increase in laser-target coupling at near-relativistic intensities using compound parabolic concentrators. Phys Rev E 2021; 103:L031201. [PMID: 33862680 DOI: 10.1103/physreve.103.l031201] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 02/11/2021] [Indexed: 11/07/2022]
Abstract
Achieving a high conversion efficiency into relativistic electrons is central to short-pulse laser application and fundamentally relies on creating interaction regions with intensities ≫10^{18}W/cm^{2}. Small focal length optics are typically employed to achieve this goal; however, this solution is impractical for large kJ-class systems that are constrained by facility geometry, debris concerns, and component costs. We fielded target-mounted compound parabolic concentrators to overcome these limitations and achieved nearly an order-of-magnitude increase to the conversion efficiency and more than tripled electron temperature compared to flat targets. Particle-in-cell simulations demonstrate that plasma confinement within the cone and formation of turbulent laser fields that develop from cone wall reflections are responsible for the improved laser-to-target coupling. These passive target components can be used to improve the coupling efficiency for all high-intensity short-pulse laser applications, particularly at large facilities with long focal length optics.
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Affiliation(s)
- G J Williams
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Link
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Sherlock
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D A Alessi
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Bowers
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B P Golick
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Hamamoto
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M R Hermann
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Kalantar
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - K N LaFortune
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A J Mackinnon
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A MacPhee
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M J-E Manuel
- General Atomics, San Diego, California 92186, USA
| | - D Martinez
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Mauldin
- General Atomics, San Diego, California 92186, USA
| | - L Pelz
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Prantil
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Quinn
- General Atomics, San Diego, California 92186, USA
| | - B Remington
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Sigurdsson
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - P Wegner
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - K Youngblood
- General Atomics, San Diego, California 92186, USA
| | - Hui Chen
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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4
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Kabadi NV, Sio H, Glebov V, Gatu Johnson M, MacPhee A, Frenje JA, Li CK, Seguin F, Petrasso R, Forrest C, Knauer J, Rinderknecht HG. Sensitivity of chemical vapor deposition diamonds to DD and DT neutrons at OMEGA and the National Ignition Facility. Rev Sci Instrum 2016; 87:11D817. [PMID: 27910431 DOI: 10.1063/1.4960071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The particle-time-of-flight (pTOF) detector at the National Ignition Facility (NIF) is used routinely to measure nuclear bang-times in inertial confinement fusion implosions. The active detector medium in pTOF is a chemical vapor deposition diamond. Calibration of the detectors sensitivity to neutrons and protons would allow measurement of nuclear bang times and hot spot areal density (ρR) on a single diagnostic. This study utilizes data collected at both NIF and Omega in an attempt to determine pTOF's absolute sensitivity to neutrons. At Omega pTOF's sensitivity to DT-n is found to be stable to within 8% at different bias voltages. At the NIF pTOF's sensitivity to DD-n varies by up to 59%. This variability must be decreased substantially for pTOF to function as a neutron yield detector at the NIF. Some possible causes of this variability are ruled out.
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Affiliation(s)
- N V Kabadi
- Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - H Sio
- Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - V Glebov
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - M Gatu Johnson
- Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - A MacPhee
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J A Frenje
- Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - C K Li
- Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - F Seguin
- Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - R Petrasso
- Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - C Forrest
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - J Knauer
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - H G Rinderknecht
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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Dewald EL, Tommasini R, Mackinnon A, MacPhee A, Meezan N, Olson R, Hicks D, LePape S, Izumi N, Fournier K, Barrios MA, Ross S, Pak A, Döppner T, Kalantar D, Opachich K, Rygg R, Bradley D, Bell P, Hamza A, Dzenitis B, Landen OL, MacGowan B, LaFortune K, Widmayer C, Van Wonterghem B, Kilkenny J, Edwards MJ, Atherton J, Moses EI. Capsule Ablator Inflight Performance Measurements Via Streaked Radiography Of ICF Implosions On The NIF*. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/688/1/012014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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6
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Döppner T, Callahan DA, Hurricane OA, Hinkel DE, Ma T, Park HS, Berzak Hopkins LF, Casey DT, Celliers P, Dewald EL, Dittrich TR, Haan SW, Kritcher AL, MacPhee A, Le Pape S, Pak A, Patel PK, Springer PT, Salmonson JD, Tommasini R, Benedetti LR, Bond E, Bradley DK, Caggiano J, Church J, Dixit S, Edgell D, Edwards MJ, Fittinghoff DN, Frenje J, Gatu Johnson M, Grim G, Hatarik R, Havre M, Herrmann H, Izumi N, Khan SF, Kline JL, Knauer J, Kyrala GA, Landen OL, Merrill FE, Moody J, Moore AS, Nikroo A, Ralph JE, Remington BA, Robey HF, Sayre D, Schneider M, Streckert H, Town R, Turnbull D, Volegov PL, Wan A, Widmann K, Wilde CH, Yeamans C. Demonstration of High Performance in Layered Deuterium-Tritium Capsule Implosions in Uranium Hohlraums at the National Ignition Facility. Phys Rev Lett 2015; 115:055001. [PMID: 26274424 DOI: 10.1103/physrevlett.115.055001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Indexed: 06/04/2023]
Abstract
We report on the first layered deuterium-tritium (DT) capsule implosions indirectly driven by a "high-foot" laser pulse that were fielded in depleted uranium hohlraums at the National Ignition Facility. Recently, high-foot implosions have demonstrated improved resistance to ablation-front Rayleigh-Taylor instability induced mixing of ablator material into the DT hot spot [Hurricane et al., Nature (London) 506, 343 (2014)]. Uranium hohlraums provide a higher albedo and thus an increased drive equivalent to an additional 25 TW laser power at the peak of the drive compared to standard gold hohlraums leading to higher implosion velocity. Additionally, we observe an improved hot-spot shape closer to round which indicates enhanced drive from the waist. In contrast to findings in the National Ignition Campaign, now all of our highest performing experiments have been done in uranium hohlraums and achieved total yields approaching 10^{16} neutrons where more than 50% of the yield was due to additional heating of alpha particles stopping in the DT fuel.
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Affiliation(s)
- T Döppner
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - D A Callahan
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - O A Hurricane
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - D E Hinkel
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - T Ma
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - H-S Park
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - L F Berzak Hopkins
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - D T Casey
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - P Celliers
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - E L Dewald
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - T R Dittrich
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - S W Haan
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - A L Kritcher
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - A MacPhee
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - S Le Pape
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - A Pak
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - P K Patel
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - P T Springer
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - J D Salmonson
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - R Tommasini
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - L R Benedetti
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - E Bond
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - D K Bradley
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - J Caggiano
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - J Church
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - S Dixit
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - D Edgell
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - M J Edwards
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - D N Fittinghoff
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - J Frenje
- Massachusetts Institute of Technology Plasma Science and Fusion Center, Cambridge, Massachusetts 02139, USA
| | - M Gatu Johnson
- Massachusetts Institute of Technology Plasma Science and Fusion Center, Cambridge, Massachusetts 02139, USA
| | - G Grim
- Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USA
| | - R Hatarik
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - M Havre
- General Atomics, San Diego, California 92121, USA
| | - H Herrmann
- Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USA
| | - N Izumi
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - S F Khan
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - J L Kline
- Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USA
| | - J Knauer
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - G A Kyrala
- Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USA
| | - O L Landen
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - F E Merrill
- Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USA
| | - J Moody
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - A S Moore
- Atomic Weapons Establishment, Aldermaston RG7, United Kingdom
| | - A Nikroo
- General Atomics, San Diego, California 92121, USA
| | - J E Ralph
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - B A Remington
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - H F Robey
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - D Sayre
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - M Schneider
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - H Streckert
- General Atomics, San Diego, California 92121, USA
| | - R Town
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - D Turnbull
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - P L Volegov
- Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USA
| | - A Wan
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - K Widmann
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
| | - C H Wilde
- Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USA
| | - C Yeamans
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551, USA
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7
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Berzak Hopkins LF, Meezan NB, Le Pape S, Divol L, Mackinnon AJ, Ho DD, Hohenberger M, Jones OS, Kyrala G, Milovich JL, Pak A, Ralph JE, Ross JS, Benedetti LR, Biener J, Bionta R, Bond E, Bradley D, Caggiano J, Callahan D, Cerjan C, Church J, Clark D, Döppner T, Dylla-Spears R, Eckart M, Edgell D, Field J, Fittinghoff DN, Gatu Johnson M, Grim G, Guler N, Haan S, Hamza A, Hartouni EP, Hatarik R, Herrmann HW, Hinkel D, Hoover D, Huang H, Izumi N, Khan S, Kozioziemski B, Kroll J, Ma T, MacPhee A, McNaney J, Merrill F, Moody J, Nikroo A, Patel P, Robey HF, Rygg JR, Sater J, Sayre D, Schneider M, Sepke S, Stadermann M, Stoeffl W, Thomas C, Town RPJ, Volegov PL, Wild C, Wilde C, Woerner E, Yeamans C, Yoxall B, Kilkenny J, Landen OL, Hsing W, Edwards MJ. First high-convergence cryogenic implosion in a near-vacuum hohlraum. Phys Rev Lett 2015; 114:175001. [PMID: 25978240 DOI: 10.1103/physrevlett.114.175001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Indexed: 06/04/2023]
Abstract
Recent experiments on the National Ignition Facility [M. J. Edwards et al., Phys. Plasmas 20, 070501 (2013)] demonstrate that utilizing a near-vacuum hohlraum (low pressure gas-filled) is a viable option for high convergence cryogenic deuterium-tritium (DT) layered capsule implosions. This is made possible by using a dense ablator (high-density carbon), which shortens the drive duration needed to achieve high convergence: a measured 40% higher hohlraum efficiency than typical gas-filled hohlraums, which requires less laser energy going into the hohlraum, and an observed better symmetry control than anticipated by standard hydrodynamics simulations. The first series of near-vacuum hohlraum experiments culminated in a 6.8 ns, 1.2 MJ laser pulse driving a 2-shock, high adiabat (α∼3.5) cryogenic DT layered high density carbon capsule. This resulted in one of the best performances so far on the NIF relative to laser energy, with a measured primary neutron yield of 1.8×10(15) neutrons, with 20% calculated alpha heating at convergence ∼27×.
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Affiliation(s)
- L F Berzak Hopkins
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N B Meezan
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Le Pape
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - L Divol
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A J Mackinnon
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D D Ho
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Hohenberger
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - O S Jones
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G Kyrala
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - J L Milovich
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Pak
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J E Ralph
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J S Ross
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - L R Benedetti
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Biener
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Bionta
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - E Bond
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Bradley
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Caggiano
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Callahan
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - C Cerjan
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Church
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Clark
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Döppner
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Dylla-Spears
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Eckart
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Edgell
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - J Field
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D N Fittinghoff
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Gatu Johnson
- Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - G Grim
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - N Guler
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - S Haan
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Hamza
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - E P Hartouni
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R Hatarik
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - H W Herrmann
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - D Hinkel
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Hoover
- General Atomics, San Diego, California 93286, USA
| | - H Huang
- General Atomics, San Diego, California 93286, USA
| | - N Izumi
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Khan
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B Kozioziemski
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Kroll
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Ma
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A MacPhee
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J McNaney
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - F Merrill
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - J Moody
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Nikroo
- General Atomics, San Diego, California 93286, USA
| | - P Patel
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - H F Robey
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J R Rygg
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Sater
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D Sayre
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Schneider
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Sepke
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Stadermann
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - W Stoeffl
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - C Thomas
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R P J Town
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - P L Volegov
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - C Wild
- Diamond Materials GMBH, Freiburg, Germany
| | - C Wilde
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - E Woerner
- Diamond Materials GMBH, Freiburg, Germany
| | - C Yeamans
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B Yoxall
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Kilkenny
- General Atomics, San Diego, California 93286, USA
| | - O L Landen
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - W Hsing
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M J Edwards
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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8
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Rinderknecht HG, Johnson MG, Zylstra AB, Sinenian N, Rosenberg MJ, Frenje JA, Waugh CJ, Li CK, Sèguin FH, Petrasso RD, Rygg JR, Kimbrough JR, MacPhee A, Collins GW, Hicks D, Mackinnon A, Bell P, Bionta R, Clancy T, Zacharias R, Döppner T, Park HS, LePape S, Landen O, Meezan N, Moses EI, Glebov VU, Stoeckl C, Sangster TC, Olson R, Kline J, Kilkenny J. A novel particle time of flight diagnostic for measurements of shock- and compression-bang times in D3He and DT implosions at the NIF. Rev Sci Instrum 2012; 83:10D902. [PMID: 23126906 DOI: 10.1063/1.4731000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The particle-time-of-flight (pTOF) diagnostic, fielded alongside a wedge range-filter (WRF) proton spectrometer, will provide an absolute timing for the shock-burn weighted ρR measurements that will validate the modeling of implosion dynamics at the National Ignition Facility (NIF). In the first phase of the project, pTOF has recorded accurate bang times in cryogenic DT, DT exploding pusher, and D(3)He implosions using DD or DT neutrons with an accuracy better than ±70 ps. In the second phase of the project, a deflecting magnet will be incorporated into the pTOF design for simultaneous measurements of shock- and compression-bang times in D(3)He-filled surrogate implosions using D(3)He protons and DD-neutrons, respectively.
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9
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Barrios MA, MacPhee A, Regan SP, Kimbrough J, Nagel SR, Benedetti LR, Khan SF, Bradley D, Bell P, Edgell D, Collins GW. X-ray bang-time measurements at the National Ignition Facility using a diamond detector. Rev Sci Instrum 2012; 83:10E105. [PMID: 23126927 DOI: 10.1063/1.4729667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A chemical vapor deposition polycrystalline photoconductive diamond detector was fielded at NIF to measure the time of peak x-ray emission, or x-ray bang time, of inertial confinement fusion implosions. Imaging the capsule with a pinhole provides contrast against Hohlraum emission, allowing clear identification of the capsule component in the raw scope trace. X-ray bang time was measured to within ±41-46 ps with the internal photoconductive diamond detector.
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Affiliation(s)
- M A Barrios
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
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10
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Edgell DH, Bradley DK, Bond EJ, Burns S, Callahan DA, Celeste J, Eckart MJ, Glebov VY, Hey DS, Lacaille G, Kilkenny JD, Kimbrough J, Mackinnon AJ, Magoon J, Parker J, Sangster TC, Shoup MJ, Stoeckl C, Thomas T, MacPhee A. South pole bang-time diagnostic on the National Ignition Facility (invited). Rev Sci Instrum 2012; 83:10E119. [PMID: 23126941 DOI: 10.1063/1.4731756] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The south pole bang-time diagnostic views National Ignition Facility (NIF) implosions through the lower Hohlraum laser entrance hole to measure the time of peak x-ray emission (peak compression) in indirect-drive implosions. Five chemical-vapor-deposition diamond photoconductive detectors with different filtrations and sensitivities record the time-varying x rays emitted by the target. Wavelength selecting highly oriented pyrolytic graphite crystal mirror monochromators increase the x-ray signal-to-background ratio by filtering for 11-keV emission. Diagnostic timing and the in situ temporal instrument response function are determined from laser impulse shots on the NIF. After signal deconvolution and background removal, the bang time is determined to 45-ps accuracy. The x-ray "yield" (mJ∕sr∕keV at 11 keV) is determined from the time integral of the corrected peak signal.
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Affiliation(s)
- D H Edgell
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA.
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11
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Tommasini R, MacPhee A, Hey D, Ma T, Chen C, Izumi N, Unites W, MacKinnon A, Hatchett SP, Remington BA, Park HS, Springer P, Koch JA, Landen OL, Seely J, Holland G, Hudson L. Development of backlighting sources for a Compton radiography diagnostic of inertial confinement fusion targets (invited). Rev Sci Instrum 2008; 79:10E901. [PMID: 19044556 DOI: 10.1063/1.2953593] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We present scaled demonstrations of backlighter sources, emitting bremsstrahlung x rays with photon energies above 75 keV, that we will use to record x-ray Compton radiographic snapshots of cold dense DT fuel in inertial confinement fusion implosions at the National Ignition Facility (NIF). In experiments performed at the Titan laser facility at Lawrence Livermore National Laboratory, we measured the source size and the bremsstrahlung spectrum as a function of laser intensity and pulse length from solid targets irradiated at 2x10(17)-5x10(18) W/cm(2) using 2-40 ps pulses. Using Au planar foils we achieved source sizes down to 5.5 microm and conversion efficiencies of about 1x10(-13) J/J into x-ray photons with energies in the 75-100 keV spectral range. We can now use these results to design NIF backlighter targets and shielding and to predict Compton radiography performance as a function of the NIF implosion yield and associated background.
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Affiliation(s)
- R Tommasini
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
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Ditmire T, Hutchinson MH, Key MH, Lewis CL, MacPhee A, Mercer I, Neely D, Perry MD, Smith RA, Wark JS, Zepf M. Amplification of xuv harmonic radiation in a gallium amplifier. Phys Rev A 1995; 51:R4337-R4340. [PMID: 9912214 DOI: 10.1103/physreva.51.r4337] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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13
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Kodama R, Neely D, Kato Y, Daido H, Murai K, Yuan G, MacPhee A, Lewis CL. Generation of small-divergence soft x-ray laser by plasma waveguiding with a curved target. Phys Rev Lett 1994; 73:3215-3218. [PMID: 10057320 DOI: 10.1103/physrevlett.73.3215] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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14
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MacPhee A, Gaul S, Ragab MT. Control of blueberry thrips, Frankliniella vaccinii Morgan, with permethrin and effect on yield and residue in fruit. J Environ Sci Health B 1982; 17:183-193. [PMID: 7077055 DOI: 10.1080/03601238209372311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Permethrin at 0.4 kg a.i./ha controlled blueberry thrips Frankliniella vaccinii Morgan. There was no plant damage and crop yield was notably increased. Permethrin was extracted from berries with acetone, partitioned in hexane, cleaned-up on Florisil column and analysed by the electron capture gas chromatography using a 3% OV-210 column. No permethrin residues were found in the berries. The relative retention times of cis-, and trans-permethrins to aldrin were 10.3 and 12.1, respectively. The absence of permethrin from berries was further confirmed by TLC.
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