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Pak A, Zylstra AB, Baker KL, Casey DT, Dewald E, Divol L, Hohenberger M, Moore AS, Ralph JE, Schlossberg DJ, Tommasini R, Aybar N, Bachmann B, Bionta RM, Fittinghoff D, Gatu Johnson M, Geppert Kleinrath H, Geppert Kleinrath V, Hahn KD, Rubery MS, Landen OL, Moody JD, Aghaian L, Allen A, Baxamusa SH, Bhandarkar SD, Biener J, Birge NW, Braun T, Briggs TM, Choate C, Clark DS, Crippen JW, Danly C, Döppner T, Durocher M, Erickson M, Fehrenbach T, Freeman M, Havre M, Hayes S, Hilsabeck T, Holder JP, Humbird KD, Hurricane OA, Izumi N, Kerr SM, Khan SF, Kim YH, Kong C, Jeet J, Kozioziemski B, Kritcher AL, Lamb KM, Lemos NC, MacGowan BJ, Mackinnon AJ, MacPhee AG, Marley EV, Meaney K, Millot M, Di Nicola JMG, Nikroo A, Nora R, Ratledge M, Ross JS, Shin SJ, Smalyuk VA, Stadermann M, Stoupin S, Suratwala T, Trosseille C, Van Wonterghem B, Weber CR, Wild C, Wilde C, Wooddy PT, Woodworth BN, Young CV. Observations and properties of the first laboratory fusion experiment to exceed a target gain of unity. Phys Rev E 2024; 109:025203. [PMID: 38491694 DOI: 10.1103/physreve.109.025203] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 01/18/2024] [Indexed: 03/18/2024]
Abstract
An indirect-drive inertial fusion experiment on the National Ignition Facility was driven using 2.05 MJ of laser light at a wavelength of 351 nm and produced 3.1±0.16 MJ of total fusion yield, producing a target gain G=1.5±0.1 exceeding unity for the first time in a laboratory experiment [Phys. Rev. E 109, 025204 (2024)10.1103/PhysRevE.109.025204]. Herein we describe the experimental evidence for the increased drive on the capsule using additional laser energy and control over known degradation mechanisms, which are critical to achieving high performance. Improved fuel compression relative to previous megajoule-yield experiments is observed. Novel signatures of the ignition and burn propagation to high yield can now be studied in the laboratory for the first time.
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Affiliation(s)
- A Pak
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - A B Zylstra
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - K L Baker
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - D T Casey
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - E Dewald
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - L Divol
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - M Hohenberger
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - A S Moore
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - J E Ralph
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - D J Schlossberg
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - R Tommasini
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - N Aybar
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - B Bachmann
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - R M Bionta
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - D Fittinghoff
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - M Gatu Johnson
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - H Geppert Kleinrath
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - V Geppert Kleinrath
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - K D Hahn
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - M S Rubery
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - O L Landen
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - J D Moody
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - L Aghaian
- General Atomics, San Diego, California 92186, USA
| | - A Allen
- General Atomics, San Diego, California 92186, USA
| | - S H Baxamusa
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - S D Bhandarkar
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - J Biener
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - N W Birge
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - T Braun
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - T M Briggs
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - C Choate
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - D S Clark
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - J W Crippen
- General Atomics, San Diego, California 92186, USA
| | - C Danly
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - T Döppner
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - M Durocher
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - M Erickson
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | | | - M Freeman
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - M Havre
- General Atomics, San Diego, California 92186, USA
| | - S Hayes
- General Atomics, San Diego, California 92186, USA
| | - T Hilsabeck
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - J P Holder
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - K D Humbird
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - O A Hurricane
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - N Izumi
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - S M Kerr
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - S F Khan
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - Y H Kim
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - C Kong
- General Atomics, San Diego, California 92186, USA
| | - J Jeet
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - B Kozioziemski
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - A L Kritcher
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - K M Lamb
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - N C Lemos
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - B J MacGowan
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - A J Mackinnon
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - A G MacPhee
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - E V Marley
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - K Meaney
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - M Millot
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - J-M G Di Nicola
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - A Nikroo
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - R Nora
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - M Ratledge
- General Atomics, San Diego, California 92186, USA
| | - J S Ross
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - S J Shin
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - V A Smalyuk
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - M Stadermann
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - S Stoupin
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - T Suratwala
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - C Trosseille
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - B Van Wonterghem
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - C R Weber
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - C Wild
- Diamond Materials GmbH, 79108 Freiburg, Germany
| | - C Wilde
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - P T Wooddy
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - B N Woodworth
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - C V Young
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
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2
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Zylstra AB, Kritcher AL, Hurricane OA, Callahan DA, Ralph JE, Casey DT, Pak A, Landen OL, Bachmann B, Baker KL, Berzak Hopkins L, Bhandarkar SD, Biener J, Bionta RM, Birge NW, Braun T, Briggs TM, Celliers PM, Chen H, Choate C, Clark DS, Divol L, Döppner T, Fittinghoff D, Edwards MJ, Gatu Johnson M, Gharibyan N, Haan S, Hahn KD, Hartouni E, Hinkel DE, Ho DD, Hohenberger M, Holder JP, Huang H, Izumi N, Jeet J, Jones O, Kerr SM, Khan SF, Geppert Kleinrath H, Geppert Kleinrath V, Kong C, Lamb KM, Le Pape S, Lemos NC, Lindl JD, MacGowan BJ, Mackinnon AJ, MacPhee AG, Marley EV, Meaney K, Millot M, Moore AS, Newman K, Di Nicola JMG, Nikroo A, Nora R, Patel PK, Rice NG, Rubery MS, Sater J, Schlossberg DJ, Sepke SM, Sequoia K, Shin SJ, Stadermann M, Stoupin S, Strozzi DJ, Thomas CA, Tommasini R, Trosseille C, Tubman ER, Volegov PL, Weber CR, Wild C, Woods DT, Yang ST, Young CV. Experimental achievement and signatures of ignition at the National Ignition Facility. Phys Rev E 2022; 106:025202. [PMID: 36109932 DOI: 10.1103/physreve.106.025202] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 07/06/2022] [Indexed: 06/15/2023]
Abstract
An inertial fusion implosion on the National Ignition Facility, conducted on August 8, 2021 (N210808), recently produced more than a megajoule of fusion yield and passed Lawson's criterion for ignition [Phys. Rev. Lett. 129, 075001 (2022)10.1103/PhysRevLett.129.075001]. We describe the experimental improvements that enabled N210808 and present the first experimental measurements from an igniting plasma in the laboratory. Ignition metrics like the product of hot-spot energy and pressure squared, in the absence of self-heating, increased by ∼35%, leading to record values and an enhancement from previous experiments in the hot-spot energy (∼3×), pressure (∼2×), and mass (∼2×). These results are consistent with self-heating dominating other power balance terms. The burn rate increases by an order of magnitude after peak compression, and the hot-spot conditions show clear evidence for burn propagation into the dense fuel surrounding the hot spot. These novel dynamics and thermodynamic properties have never been observed on prior inertial fusion experiments.
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Affiliation(s)
- A B Zylstra
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - A L Kritcher
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - O A Hurricane
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - D A Callahan
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - J E Ralph
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - D T Casey
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - A Pak
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - O L Landen
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - B Bachmann
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - K L Baker
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - L Berzak Hopkins
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - S D Bhandarkar
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - J Biener
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - R M Bionta
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - N W Birge
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - T Braun
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - T M Briggs
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - P M Celliers
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - H Chen
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - C Choate
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - D S Clark
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - L Divol
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - T Döppner
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - D Fittinghoff
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - M J Edwards
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - M Gatu Johnson
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - N Gharibyan
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - S Haan
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - K D Hahn
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - E Hartouni
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - D E Hinkel
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - D D Ho
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - M Hohenberger
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - J P Holder
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - H Huang
- General Atomics, San Diego, California 92186, USA
| | - N Izumi
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - J Jeet
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - O Jones
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - S M Kerr
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - S F Khan
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - H Geppert Kleinrath
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - V Geppert Kleinrath
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - C Kong
- General Atomics, San Diego, California 92186, USA
| | - K M Lamb
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - S Le Pape
- Laboratoire pour l'utilisation des Lasers Intenses chez École Polytechnique, F-91128 Palaiseau cedex, France
| | - N C Lemos
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - J D Lindl
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - B J MacGowan
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - A J Mackinnon
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - A G MacPhee
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - E V Marley
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - K Meaney
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - M Millot
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - A S Moore
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - K Newman
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - J-M G Di Nicola
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - A Nikroo
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - R Nora
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - P K Patel
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - N G Rice
- General Atomics, San Diego, California 92186, USA
| | - M S Rubery
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - J Sater
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - D J Schlossberg
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - S M Sepke
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - K Sequoia
- General Atomics, San Diego, California 92186, USA
| | - S J Shin
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - M Stadermann
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - S Stoupin
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - D J Strozzi
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - C A Thomas
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - R Tommasini
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - C Trosseille
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - E R Tubman
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - P L Volegov
- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
| | - C R Weber
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - C Wild
- Diamond Materials Gmbh, 79108 Freiburg, Germany
| | - D T Woods
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - S T Yang
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - C V Young
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
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3
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Kritcher AL, Zylstra AB, Callahan DA, Hurricane OA, Weber CR, Clark DS, Young CV, Ralph JE, Casey DT, Pak A, Landen OL, Bachmann B, Baker KL, Berzak Hopkins L, Bhandarkar SD, Biener J, Bionta RM, Birge NW, Braun T, Briggs TM, Celliers PM, Chen H, Choate C, Divol L, Döppner T, Fittinghoff D, Edwards MJ, Gatu Johnson M, Gharibyan N, Haan S, Hahn KD, Hartouni E, Hinkel DE, Ho DD, Hohenberger M, Holder JP, Huang H, Izumi N, Jeet J, Jones O, Kerr SM, Khan SF, Geppert Kleinrath H, Geppert Kleinrath V, Kong C, Lamb KM, Le Pape S, Lemos NC, Lindl JD, MacGowan BJ, Mackinnon AJ, MacPhee AG, Marley EV, Meaney K, Millot M, Moore AS, Newman K, Di Nicola JMG, Nikroo A, Nora R, Patel PK, Rice NG, Rubery MS, Sater J, Schlossberg DJ, Sepke SM, Sequoia K, Shin SJ, Stadermann M, Stoupin S, Strozzi DJ, Thomas CA, Tommasini R, Trosseille C, Tubman ER, Volegov PL, Wild C, Woods DT, Yang ST. Design of an inertial fusion experiment exceeding the Lawson criterion for ignition. Phys Rev E 2022; 106:025201. [PMID: 36110025 DOI: 10.1103/physreve.106.025201] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 07/13/2022] [Indexed: 06/15/2023]
Abstract
We present the design of the first igniting fusion plasma in the laboratory by Lawson's criterion that produced 1.37 MJ of fusion energy, Hybrid-E experiment N210808 (August 8, 2021) [Phys. Rev. Lett. 129, 075001 (2022)10.1103/PhysRevLett.129.075001]. This design uses the indirect drive inertial confinement fusion approach to heat and compress a central "hot spot" of deuterium-tritium (DT) fuel using a surrounding dense DT fuel piston. Ignition occurs when the heating from absorption of α particles created in the fusion process overcomes the loss mechanisms in the system for a duration of time. This letter describes key design changes which enabled a ∼3-6× increase in an ignition figure of merit (generalized Lawson criterion) [Phys. Plasmas 28, 022704 (2021)1070-664X10.1063/5.0035583, Phys. Plasmas 25, 122704 (2018)1070-664X10.1063/1.5049595]) and an eightfold increase in fusion energy output compared to predecessor experiments. We present simulations of the hot-spot conditions for experiment N210808 that show fundamentally different behavior compared to predecessor experiments and simulated metrics that are consistent with N210808 reaching for the first time in the laboratory "ignition."
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Affiliation(s)
- A L Kritcher
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - A B Zylstra
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - D A Callahan
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - O A Hurricane
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - C R Weber
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - D S Clark
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - C V Young
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - J E Ralph
- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
| | - D T Casey
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- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
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- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
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- Los Alamos National Laboratory, Mail Stop F663, Los Alamos, New Mexico 87545, USA
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- Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA
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4
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Gales SG, Horsfield CJ, Meadowcroft AL, Leatherland AE, Herrmann HW, Hares JD, Dymoke-Bradshaw AKL, Milnes JS, Kim YH, Kleinrath HG, Meaney K, Zylstra AB, Parker S, Hussey D, Wilson L, James SF, Kilkenny JD, Hilsabeck TJ. Characterisation of a sub-20 ps temporal resolution pulse dilation photomultiplier tube. Rev Sci Instrum 2018; 89:063506. [PMID: 29960515 DOI: 10.1063/1.5031110] [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: 06/08/2023]
Abstract
A pulse-dilation photomultiplier tube (PD-PMT) with sub-20 ps temporal resolution has been developed for use with γ-ray-sensitive gas Cherenkov detectors at the National Ignition Facility to improve the diagnosis of nuclear fusion burn history and the areal density of the remaining capsule ablator. The pulse-dilation mechanism entails the application of a time-dependent, ramp waveform to a photocathode-mesh structure, introducing a time-dependent photoelectron accelerating potential. The electric field imparts axial velocity dispersion to outgoing photoelectrons. The photoelectron pulse is dilated as it transits a drift region prior to amplification in a microchannel plate and read out with a digital oscilloscope. We report the first measurements with the prototype PD-PMT demonstrating nominal <20 ps FWHM across a 400 ps measurement window and <30 ps FWHM for an extracted charge up to 300 pC. The output peak areas are linear to within 20% over 3 orders of magnitude of input intensity. 3D particle in cell simulations, which included space charge effects, have been carried out to investigate the device temporal magnification, resolution, and linearity.
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Affiliation(s)
- S G Gales
- AWE plc, Aldermaston, Reading RG7 4PR, United Kingdom
| | - C J Horsfield
- AWE plc, Aldermaston, Reading RG7 4PR, United Kingdom
| | | | | | - H W Herrmann
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - J D Hares
- Kentech Instruments Ltd., Wallingford OX10 8BD, United Kingdom
| | | | - J S Milnes
- Photek Ltd., St Leonards-on-Sea TN38 9NS, United Kingdom
| | - Y H Kim
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - H G Kleinrath
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - K Meaney
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - A B Zylstra
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - S Parker
- AWE plc, Aldermaston, Reading RG7 4PR, United Kingdom
| | - D Hussey
- AWE plc, Aldermaston, Reading RG7 4PR, United Kingdom
| | - L Wilson
- AWE plc, Aldermaston, Reading RG7 4PR, United Kingdom
| | - S F James
- AWE plc, Aldermaston, Reading RG7 4PR, United Kingdom
| | - J D Kilkenny
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA
| | - T J Hilsabeck
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA
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