1
|
Wasser F, Zähter Ş, Sokol M, Rivers M, Atzeni S, Condamine FP, Cristoforetti G, Fauvel G, Fischer N, Gizzi LA, Hannasch A, Hesse M, Laštovička T, Lutz P, Rubovič P, Schaumann G, Schott N, Singh RL, Theobald W, Weber S, Ditmire T, Forner T, Roth M. Full aperture backscatter diagnostics for characterization of laser plasma instabilities at the extreme light infrastructure (ELI) beamlines. Rev Sci Instrum 2023; 94:093503. [PMID: 37737696 DOI: 10.1063/5.0153874] [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] [Received: 04/12/2023] [Accepted: 09/04/2023] [Indexed: 09/23/2023]
Abstract
We report on the commissioning of a full aperture backscatter diagnostics station for the kilojoule, nanosecond high repetition rate L4n laser operating at a wavelength of 527 nm at the Extreme Light Infrastructure (ELI) - Beamlines, Dolni Brezany, Czech Republic. Light scattered back from laser-plasma interaction into the cone of the final focusing lens is captured and split into different channels to measure the signatures of laser plasma instabilities from stimulated Brillouin scattering, stimulated Raman scattering, and two plasmon decay with respect to back scattered energy, its spectrum, and its temporal profile. The performance was confirmed in a commissioning experiment with more than 800 shots at laser intensities ranging from 0.5 × 1013 to 1.1 × 1015 W cm-2. These diagnostics are permanently installed at ELI Beamlines, and can be used to understand the details of laser-plasma interactions in experiments with kJ and 527 nm light. The large number of shots that can be collected in an experimental campaign will allow us to study the details of the laser-plasma interaction with a high level of confidence.
Collapse
Affiliation(s)
- F Wasser
- Focused Energy GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany
- IU Internationale Hochschule GmbH, Darmstädter Landstrasse 110, 60598 Frankfurt am Main, Germany
| | - Ş Zähter
- Focused Energy GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany
| | - M Sokol
- Focused Energy GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany
| | - M Rivers
- University of Texas, 110 Inner Campus Dr., Austin, Texas 78712, USA
| | - S Atzeni
- Focused Energy GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany
| | - F P Condamine
- Extreme Light Infrastructure ERIC, ELI-Beamlines Facility, 25241 Dolní Břežany, Czech Republic
| | | | - G Fauvel
- Extreme Light Infrastructure ERIC, ELI-Beamlines Facility, 25241 Dolní Břežany, Czech Republic
| | - N Fischer
- Focused Energy GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany
| | - L A Gizzi
- Intense Laser Irradiation Laboratory, INO-CNR, Pisa, Italy
| | - A Hannasch
- Focused Energy GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany
| | - M Hesse
- Focused Energy GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany
| | - T Laštovička
- Extreme Light Infrastructure ERIC, ELI-Beamlines Facility, 25241 Dolní Břežany, Czech Republic
| | - P Lutz
- Focused Energy GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany
| | - P Rubovič
- Extreme Light Infrastructure ERIC, ELI-Beamlines Facility, 25241 Dolní Břežany, Czech Republic
| | - G Schaumann
- Focused Energy GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany
| | - N Schott
- Focused Energy GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany
- Technische Universität Darmstadt, Schlossgartenstrasse 9, 64289 Darmstadt, Germany
| | - R L Singh
- Extreme Light Infrastructure ERIC, ELI-Beamlines Facility, 25241 Dolní Břežany, Czech Republic
| | - W Theobald
- Focused Energy GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany
| | - S Weber
- Extreme Light Infrastructure ERIC, ELI-Beamlines Facility, 25241 Dolní Břežany, Czech Republic
| | - T Ditmire
- University of Texas, 110 Inner Campus Dr., Austin, Texas 78712, USA
| | - T Forner
- Focused Energy GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany
| | - M Roth
- Focused Energy GmbH, Im Tiefen See 45, 64293 Darmstadt, Germany
- Technische Universität Darmstadt, Schlossgartenstrasse 9, 64289 Darmstadt, Germany
| |
Collapse
|
2
|
Laso Garcia A, Hannasch A, Molodtsova M, Ferrari A, Couperus Cadabağ JP, Downer MC, Irman A, Kraft SD, Metzkes-Ng J, Naumann L, Prencipe I, Schramm U, Zeil K, Zgadzaj R, Ziegler T, Cowan TE. Calorimeter with Bayesian unfolding of spectra of high-flux broadband x rays. Rev Sci Instrum 2022; 93:043102. [PMID: 35489906 DOI: 10.1063/5.0078443] [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] [Received: 11/12/2021] [Accepted: 03/13/2022] [Indexed: 06/14/2023]
Abstract
We report the development of a multipurpose differential x-ray calorimeter with a broad energy bandwidth. The absorber architecture is combined with a Bayesian unfolding algorithm to unfold high energy x-ray spectra generated in high-intensity laser-matter interactions. Particularly, we show how to extract absolute energy spectra and how our unfolding algorithm can reconstruct features not included in the initial guess. The performance of the calorimeter is evaluated via Monte Carlo generated data. The method accuracy to reconstruct electron temperatures from bremsstrahlung is shown to be 5% for electron temperatures from 1 to 50 MeV. We study bremsstrahlung generated in solid target interaction showing an electron temperature of 0.56 ± 0.04 MeV for a 700 μm Ti titanium target and 0.53 ± 0.03 MeV for a 50 μm target. We investigate bremsstrahlung from a target irradiated by laser-wakefield accelerated electrons showing an endpoint energy of 551 ± 5 MeV, inverse Compton generated x rays with a peak energy of 1.1 MeV, and calibrated radioactive sources. The total energy range covered by all these sources ranges from 10 keV to 551 MeV.
Collapse
Affiliation(s)
- A Laso Garcia
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - A Hannasch
- Department of Physics, The University of Texas at Austin, Austin, Texas 78712-1081, USA
| | - M Molodtsova
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - A Ferrari
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - J P Couperus Cadabağ
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - M C Downer
- Department of Physics, The University of Texas at Austin, Austin, Texas 78712-1081, USA
| | - A Irman
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - S D Kraft
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - J Metzkes-Ng
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - L Naumann
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - I Prencipe
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - U Schramm
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - K Zeil
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - R Zgadzaj
- Department of Physics, The University of Texas at Austin, Austin, Texas 78712-1081, USA
| | - T Ziegler
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - T E Cowan
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| |
Collapse
|
3
|
Hannasch A, Laso Garcia A, LaBerge M, Zgadzaj R, Köhler A, Couperus Cabadağ JP, Zarini O, Kurz T, Ferrari A, Molodtsova M, Naumann L, Cowan TE, Schramm U, Irman A, Downer MC. Compact spectroscopy of keV to MeV X-rays from a laser wakefield accelerator. Sci Rep 2021; 11:14368. [PMID: 34257331 PMCID: PMC8277848 DOI: 10.1038/s41598-021-93689-5] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 06/22/2021] [Indexed: 11/24/2022] Open
Abstract
We reconstruct spectra of secondary X-rays from a tunable 250–350 MeV laser wakefield electron accelerator from single-shot X-ray depth-energy measurements in a compact (7.5 × 7.5 × 15 cm), modular X-ray calorimeter made of alternating layers of absorbing materials and imaging plates. X-rays range from few-keV betatron to few-MeV inverse Compton to > 100 MeV bremsstrahlung emission, and are characterized both individually and in mixtures. Geant4 simulations of energy deposition of single-energy X-rays in the stack generate an energy-vs-depth response matrix for a given stack configuration. An iterative reconstruction algorithm based on analytic models of betatron, inverse Compton and bremsstrahlung photon energy distributions then unfolds X-ray spectra, typically within a minute. We discuss uncertainties, limitations and extensions of both measurement and reconstruction methods.
Collapse
Affiliation(s)
- A Hannasch
- Department of Physics, The University of Texas at Austin, Austin, TX, 78712-1081, USA
| | - A Laso Garcia
- The Helmholtz-Zentrum Dresden-Rossendorf, Institute for Radiation Physics, 01328, Dresden, Germany
| | - M LaBerge
- Department of Physics, The University of Texas at Austin, Austin, TX, 78712-1081, USA.,The Helmholtz-Zentrum Dresden-Rossendorf, Institute for Radiation Physics, 01328, Dresden, Germany
| | - R Zgadzaj
- Department of Physics, The University of Texas at Austin, Austin, TX, 78712-1081, USA
| | - A Köhler
- The Helmholtz-Zentrum Dresden-Rossendorf, Institute for Radiation Physics, 01328, Dresden, Germany
| | - J P Couperus Cabadağ
- The Helmholtz-Zentrum Dresden-Rossendorf, Institute for Radiation Physics, 01328, Dresden, Germany
| | - O Zarini
- The Helmholtz-Zentrum Dresden-Rossendorf, Institute for Radiation Physics, 01328, Dresden, Germany
| | - T Kurz
- The Helmholtz-Zentrum Dresden-Rossendorf, Institute for Radiation Physics, 01328, Dresden, Germany.,Technische Universität Dresden, 01069, Dresden, Germany
| | - A Ferrari
- The Helmholtz-Zentrum Dresden-Rossendorf, Institute for Radiation Physics, 01328, Dresden, Germany
| | - M Molodtsova
- The Helmholtz-Zentrum Dresden-Rossendorf, Institute for Radiation Physics, 01328, Dresden, Germany.,Technische Universität Dresden, 01069, Dresden, Germany
| | - L Naumann
- The Helmholtz-Zentrum Dresden-Rossendorf, Institute for Radiation Physics, 01328, Dresden, Germany
| | - T E Cowan
- The Helmholtz-Zentrum Dresden-Rossendorf, Institute for Radiation Physics, 01328, Dresden, Germany.,Technische Universität Dresden, 01069, Dresden, Germany
| | - U Schramm
- The Helmholtz-Zentrum Dresden-Rossendorf, Institute for Radiation Physics, 01328, Dresden, Germany.,Technische Universität Dresden, 01069, Dresden, Germany
| | - A Irman
- The Helmholtz-Zentrum Dresden-Rossendorf, Institute for Radiation Physics, 01328, Dresden, Germany
| | - M C Downer
- Department of Physics, The University of Texas at Austin, Austin, TX, 78712-1081, USA.
| |
Collapse
|
4
|
Rusby DR, King PM, Pak A, Lemos N, Kerr S, Cochran G, Pagano I, Hannasch A, Quevedo H, Spinks M, Donovan M, Link A, Kemp A, Wilks SC, Williams GJ, Manuel MJE, Gavin Z, Haid A, Albert F, Aufderheide M, Chen H, Siders CW, Macphee A, Mackinnon A. Enhancements in laser-generated hot-electron production via focusing cone targets at short pulse and high contrast. Phys Rev E 2021; 103:053207. [PMID: 34134339 DOI: 10.1103/physreve.103.053207] [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: 12/14/2020] [Accepted: 03/31/2021] [Indexed: 11/07/2022]
Abstract
We report on the increase in the accelerated electron number and energy using compound parabolic concentrator (CPC) targets from a short-pulse (∼150 fs), high-intensity (>10^{18} W/cm^{2}), and high-contrast (∼10^{8}) laser-solid interaction. We report on experimental measurements using CPC targets where the hot-electron temperature is enhanced up to ∼9 times when compared to planar targets. The temperature measured from the CPC target is 〈T_{e}〉=4.4±1.3 MeV. Using hydrodynamic and particle in cell simulations, we identify the primary source of this temperature enhancement is the intensity increase caused by the CPC geometry that focuses the laser, reducing the focal spot and therefore increasing the intensity of the laser-solid interaction, which is also consistent with analytic expectations for the geometrical focusing.
Collapse
Affiliation(s)
- D R Rusby
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - P M King
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA.,Department of Physics, University of Texas at Austin, Austin, Texas 78712, USA
| | - A Pak
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N Lemos
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Kerr
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G Cochran
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - I Pagano
- Department of Physics, University of Texas at Austin, Austin, Texas 78712, USA
| | - A Hannasch
- Department of Physics, University of Texas at Austin, Austin, Texas 78712, USA
| | - H Quevedo
- Department of Physics, University of Texas at Austin, Austin, Texas 78712, USA
| | - M Spinks
- Department of Physics, University of Texas at Austin, Austin, Texas 78712, USA
| | - M Donovan
- Department of Physics, University of Texas at Austin, Austin, Texas 78712, USA
| | - A Link
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Kemp
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S C Wilks
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G J Williams
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M J-E Manuel
- General Atomics, 3550 General Atomics Ave, San Diego, California 92103, USA
| | - Z Gavin
- General Atomics, 3550 General Atomics Ave, San Diego, California 92103, USA
| | - A Haid
- General Atomics, 3550 General Atomics Ave, San Diego, California 92103, USA
| | - F Albert
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Aufderheide
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - H Chen
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - C W Siders
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Macphee
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Mackinnon
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| |
Collapse
|
5
|
Lumpkin AH, LaBerge M, Rule DW, Zgadzaj R, Hannasch A, Zarini O, Bowers B, Irman A, Couperus Cabadağ JP, Debus A, Köhler A, Schramm U, Downer MC. Coherent Optical Signatures of Electron Microbunching in Laser-Driven Plasma Accelerators. Phys Rev Lett 2020; 125:014801. [PMID: 32678646 DOI: 10.1103/physrevlett.125.014801] [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: 07/12/2019] [Revised: 05/27/2020] [Accepted: 06/09/2020] [Indexed: 06/11/2023]
Abstract
We report observations of coherent optical transition radiation interferometry (COTRI) patterns generated by microbunched ∼200-MeV electrons as they emerge from a laser-driven plasma accelerator. The divergence of the microbunched portion of electrons, deduced by comparison to a COTRI model, is ∼9× smaller than the ∼3 mrad ensemble beam divergence, while the radius of the microbunched beam, obtained from COTR images on the same shot, is <3 μm. The combined results show that the microbunched distribution has estimated transverse normalized emittance ∼0.4 mm mrad.
Collapse
Affiliation(s)
- A H Lumpkin
- Accelerator Division, Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
| | - M LaBerge
- Physics Department, University of Texas-Austin, Austin, Texas 78712, USA
| | - D W Rule
- Silver Spring, Maryland 20904, USA
| | - R Zgadzaj
- Physics Department, University of Texas-Austin, Austin, Texas 78712, USA
| | - A Hannasch
- Physics Department, University of Texas-Austin, Austin, Texas 78712, USA
| | - O Zarini
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - B Bowers
- Physics Department, University of Texas-Austin, Austin, Texas 78712, USA
| | - A Irman
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
| | - J P Couperus Cabadağ
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
| | - A Debus
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
| | - A Köhler
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - U Schramm
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - M C Downer
- Physics Department, University of Texas-Austin, Austin, Texas 78712, USA
| |
Collapse
|