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Zhao H, Li Z, Yang D, Jiang X, Liu Y, Wang F, Zhou W, Yan Y, He J, Li S, Guo L, Peng X, Xu T, Liu S, Wang F, Yang J, Jiang S, Zheng W, Zhang B, Ding Y. Implementation of ultraviolet Thomson scattering on SG-III laser facility. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:093505. [PMID: 30278718 DOI: 10.1063/1.5046837] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 09/05/2018] [Indexed: 06/08/2023]
Abstract
An ultraviolet Thomson-scattering system has been designed and implemented on the Shenguang-III laser facility, a 48-beam, 3ω (351 nm), 180 kJ-level laser driver for high energy density physics and inertial confinement fusion researches. The 4ω (263.3 nm) probe beam of the Thomson-scattering system is injected from the north pole (top) of the target chamber, with an assistant beam-pointing monitor to achieve high pointing accuracy. The Thomson-scattered light is collected by a double-Cassegrain optical transmission system, which provides an achromatic image over a wide wavelength range of 200-800 nm. A novel on-line alignment method is developed and applied to the diagnostic system, ensuring a volumetric positioning accuracy of ∼30 μm for the scattering volume. An online calibration is also conducted to provide the wavelength benchmark and the spectral resolution of the system. This Thomson-scattering system has been tested in a complicated experimental environment with gas-filled hohlraums, and a high-quality ion feature of the scattered light has been obtained.
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Affiliation(s)
- Hang Zhao
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Zhichao Li
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Dong Yang
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Xiaohua Jiang
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Yonggang Liu
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Fang Wang
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Wei Zhou
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Yadong Yan
- Xian Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xian, Shanxi 710068, People's Republic of China
| | - Junhua He
- Xian Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xian, Shanxi 710068, People's Republic of China
| | - Sanwei Li
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Liang Guo
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Xiaoshi Peng
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Tao Xu
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Shenye Liu
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Feng Wang
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Jiamin Yang
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Shaoen Jiang
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Wanguo Zheng
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Baohan Zhang
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900, People's Republic of China
| | - Yongkun Ding
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, People's Republic of China
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Follett RK, Delettrez JA, Edgell DH, Henchen RJ, Katz J, Myatt JF, Froula DH. Plasma characterization using ultraviolet Thomson scattering from ion-acoustic and electron plasma waves (invited). THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:11E401. [PMID: 27910493 DOI: 10.1063/1.4959160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Collective Thomson scattering is a technique for measuring the plasma conditions in laser-plasma experiments. Simultaneous measurements of ion-acoustic and electron plasma-wave spectra were obtained using a 263.25-nm Thomson-scattering probe beam. A fully reflective collection system was used to record light scattered from electron plasma waves at electron densities greater than 1021 cm-3, which produced scattering peaks near 200 nm. An accurate analysis of the experimental Thomson-scattering spectra required accounting for plasma gradients, instrument sensitivity, optical effects, and background radiation. Practical techniques for including these effects when fitting Thomson-scattering spectra are presented and applied to the measured spectra to show the improvements in plasma characterization.
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Affiliation(s)
- R K Follett
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
| | - J A Delettrez
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
| | - D H Edgell
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
| | - R J Henchen
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
| | - J Katz
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
| | - J F Myatt
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
| | - D H Froula
- Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA
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Kline JL, Montgomery DS, Bezzerides B, Cobble JA, DuBois DF, Johnson RP, Rose HA, Yin L, Vu HX. Observation of a transition from fluid to kinetic nonlinearities for langmuir waves driven by stimulated Raman backscatter. PHYSICAL REVIEW LETTERS 2005; 94:175003. [PMID: 15904305 DOI: 10.1103/physrevlett.94.175003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2003] [Indexed: 05/02/2023]
Abstract
Thomson scattering is used to measure Langmuir waves (LW) driven by stimulated Raman scattering (SRS) in a diffraction limited laser focal spot. For SRS at wave numbers klambda(D) less similar 0.29, where k is the LW number and lambda(D) is the Debye length, multiple waves are detected and are attributed to the Langmuir decay instability (LDI) driven by the primary LW. At klambda(D) greater similar 0.29, a single wave, frequency-broadened spectrum is observed. The transition from the fluid to the kinetic regime is qualitatively consistent with particle-in-cell simulations and crossing of the LDI amplitude threshold above that for LW self-focusing.
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Affiliation(s)
- J L Kline
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
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Depierreux S, Fuchs J, Labaune C, Michard A, Baldis HA, Pesme D, Huller S, Laval G. First observation of ion acoustic waves produced by the langmuir decay instability. PHYSICAL REVIEW LETTERS 2000; 84:2869-2872. [PMID: 11018963 DOI: 10.1103/physrevlett.84.2869] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/1999] [Indexed: 05/23/2023]
Abstract
Thomson scattering measurements are presented which demonstrate conclusively the occurrence of the Langmuir decay instability (LDI) in a laser-produced plasma experiment. Both products of the instability, the ion acoustic wave and the electron plasma wave, were simultaneously observed and identified with their spectral characteristics. The secondary decay of the LDI-generated electron plasma wave, into another Langmuir wave and an ion acoustic wave, has been observed for the first time. The connection with growth and saturation of the stimulated Raman instability is discussed.
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Affiliation(s)
- S Depierreux
- Laboratoire pour l'Utilisation des Lasers Intenses, UMR 7605 CNRS-Ecole Polytechnique-CEA-Universite Paris VI, Ecole Polytechnique, 91128 Palaiseau Cedex, France
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Fernández JC, Cobble JA, Failor BH, DuBois DF, Montgomery DS, Rose HA, Vu HX, Wilde BH, Wilke MD, Chrien RE. Observed Dependence of Stimulated Raman Scattering on Ion-Acoustic Damping in Hohlraum Plasmas. PHYSICAL REVIEW LETTERS 1996; 77:2702-2705. [PMID: 10062024 DOI: 10.1103/physrevlett.77.2702] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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