Broadband laser driven near-forward scattering light of planar film target

Long Xin-Yu; Xiong Jun; An Hong-Hai; Xie Zhi-Yong; Wang Pei-Pei; Fang Zhi-Heng; Wang Wei; Sun Jin-Ren; Wang Chen

doi:10.7498/aps.73.20240823

Abstract

Laser-plasma instability (LPI) is one of the key problems in the ignition process of inertial confinement fusion (ICF), and has been extensively studied in theory, simulation, and experiment for many years. Broadband laser, due to its low temporal coherence, can reduce the effective electric field strength when interacting with plasma and disrupt the phase-matching conditions of LPI, thus an effective approach to solving LPI issues is considered. Current extensive simulation studies indicate that broadband laser can suppress the generation of phenomena such as stimulated Brillouin scattering (SBS), stimulated Raman scattering (SRS), and two-plasmon decay (TPD) to some extent. There are also a few backward scattering experimental studies, but more experimental researches, such as side-scattering, are still needed. Therefore, based on the broadband second harmonic laser facility “Kunwu”, the experiments are designed for studying the lateral scattering of critical density plasma driven by broadband laser and traditional narrowband laser, and the production of hot electrons as well in this work. The experimental results show that the side SBS spectra and side SRS spectra and portions at different angles excited by broadband lasers with a power density of 1×10¹⁵ W/cm² are significantly different from those by narrowband lasers. Further analysis reveals that the overall portion of transverse hot electrons in broadband laser cases is higher than that in narrowband laser case. However, for broadband laser, the portion of SRS at small forward angle and backward angle are significantly lower than that for narrowband laser. Preliminary qualitative analysis suggests that SRS may not be the main mechanism for hot electron generation in this case, and that PDI might play a dominant role in generating hot electrons.

Keywords:

Authors and contacts

Shanghai Institute of Laser Plasma, China Academy of Engineering Physics, Shanghai 201800, China

Corresponding author: Sun Jin-Ren, sunjinren@263.net ; Wang Chen, wangch@mail.shcnc.ac.cn

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 12074353, 12075227).

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References

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Cited By

图 1 实验方案示意图

Figure 1. Sketch of the experimental setup.

DownLoad: Full-Size Img PowerPoint

图 2 实验用靶示意图

Figure 2. Schematic diagram of the target.

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图 3 宽带激光与窄带激光驱动平面厚靶的25°近背向散射典型光谱

Figure 3. 25° near back-scatter typical spectra driven by broadband laser and narrowband laser.

DownLoad: Full-Size Img PowerPoint

图 4 宽带与窄带驱动平面厚靶的85°侧向散射典型光谱

Figure 4. 85° side-scatter typical spectra driven by broadband laser and narrowband laser.

DownLoad: Full-Size Img PowerPoint

图 5 宽带与窄带驱动平面厚靶的140°近前向散射典型光谱

Figure 5. 140° near forward-scatter typical spectra driven by broadband laser and narrowband laser.

DownLoad: Full-Size Img PowerPoint

图 6 不同角度的散射光能量份额　(a) SBS; (b) SRS

Figure 6. Energy information at different scattering measurement angles: (a) SBS; (b) SRS.

DownLoad: Full-Size Img PowerPoint

图 7 不同角度的超热电子产生情况　(a)能谱图; (b) 份额图

Figure 7. Hot electrons at different scattering measurement angles: (a) Energy spectrum; (b) share chart.

DownLoad: Full-Size Img PowerPoint

[1]	Lindl J D, Amendt P, Berger R L, Glendinning S G, Glenzer S H, Haan S W, Kauffman R L, Landen O L, Suter L J 2004 Phys. Plasmas 11 339 Google Scholar
[2]	杨冬, 李志超, 李三伟, 郝亮, 李欣, 郭亮, 邹士阳, 蒋小华, 彭晓世, 徐涛, 理玉龙, 郑春阳, 蔡洪波, 刘占军, 郑坚, 龚韬, 王哲斌, 黎航, 况龙钰, 李琦, 王峰, 刘慎业, 杨家敏, 江少恩, 张保汉, 丁永坤 2018 中国科学: 物理学力学天文学 48 065203 Google Scholar Yang D, Li Z C, Li S W, Hao L, Li X, Guo L, Zou S Y, Jiang X H, Peng X S, Xu T, Li Y L, Zheng C Y, Cai H B, Liu Z J, Zheng J, Long T, Wang Z B, Li H, Kuang L Y, Li Q, Wang F, Liu S Y, Yang J M, Jiang S E, Zhang B H, Ding Y K 2018 Sci. Sin-Phys. Mech. Astron. 48 065203 Google Scholar
[3]	MacGowan B J, Afeyan B B, Back C A, Berger R L, Bonnaud G, Casanova M, Cohen B I, Desenne D E, DuBois D F, Dulieu A G, Estabrook K G, Fernandez J C, Glenzer S H, Hinkel D E, Kaiser T B, Kalantar D H, Kauffman R L, Kirkwood R K, Kruer W L, Langdon A B, Lasinski B F, Montgomery D S, Moody J D, Munro D H, Powers L V, Rose H A, Rousseaux C, Turner R E, Wilde B H, Wilks S C, Williams E A 1996 Phys. Plasmas 3 2029 Google Scholar
[4]	Montgomery D S, Afeyan B B, Cobble J A, Fernandez J C, Wilke M D, Glenzer S H, Kirkwood R K, MacGowan B J, Moody J D, Lindman E L, Munro D H, Wilde B H, Rose H A, Dubois D F, Bezzerides B, Vu H X 1998 Phys. Plasmas 5 1973 Google Scholar
[5]	Li C X, Dong L F, Feng J Y, Huang Y P, Sun H Y 2020 Rev. Sci Instrum. 91 026105 Google Scholar
[6]	Niemann C, Berger R, Divol L, Kirkwood R, Moody J, Sorce C, Glenzer S 2011 J. Instrum. 6 P10008 Google Scholar
[7]	Froula D, Divol L, London R, Berger R, Döppner T, Meezan N, Ross J, Suter L, Sorce C, Glenzer S 2009 Phys. Rev. Lett. 103 045006 Google Scholar
[8]	Follett R K, Shaw J G, Myatt J F, Palastro J P, Short R W, Froula D H 2018 Phys. Rev. Lett. 120 135005 Google Scholar
[9]	Bibeau C, Speck D R, Ehrlich R B, Laumann C W, Kyrazis D T, Henesian M A, Lawson J K, Perry M D, Wegner P J, Weiland T L 1992 Appl. Opt 31 5799 Google Scholar
[10]	Dixit S N, Feit M D, Perry M D, Powell H T 1996 Opt. Lett 21 1715 Google Scholar
[11]	Grun J, Emery M E, Manka C K, Lee T N, McLean E A, Mostovych A, Stamper J, Bodner S, Obenschain S P, Ripin B H 1987 Phys. Rev. Lett. 58 2672 Google Scholar
[12]	Duluc M, Penninckx D, Loiseau P, Riazuelo G, Bourgeade A, Chatagnier A, D’Humières E 2019 Phys. Plasmas 26 42707 Google Scholar
[13]	Albright B, Yin L, Afeyan B 2014 Phys. Rev. Lett. 113 045002 Google Scholar
[14]	Feng Q S, Liu Z J, Cao L H, Xiao C Z, Hao L, Zheng C Y, Ning C, He X T 2020 Nucl. Fusion 60 066012 Google Scholar
[15]	Zhong Z Q, Li B, Xiong H, Li J W, Qiu J, Hao L, Zhang B 2021 Opt. Express 29 1304 Google Scholar
[16]	Follett R K, Shaw J G, Myatt J F, Dorrer C, Froula D H, Palastro J P 2019 Phys. Plasmas 26 062111 Google Scholar
[17]	Thomson J J, Karush J I 1974 Phys. Fluids 17 1608 Google Scholar
[18]	Gao Y Q, Cui Y, Ji L L, Rao D X, Zhao X H, Li F J, Liu D, Feng W, Xia L, Liu J N, Shi H T, Du P Y, Liu J, Li X L, Wang T, Zhang T X, Shan C, Hua Y L, Ma W X, Sun X, Chen X F, Huang X G, Zhu J A, Pei W B, Sui Z, Fu S Z 2020 Matter Radiat. Extrem. 5 065201 Google Scholar
[19]	Lei A L, Kang N, Zhao Y, Liu H Y, An H H, Xiong J, Wang R R, Xie Z Y, Tu Y C, Xu G X, Zhou X C, Fang Z H, Wang W, Xia L, Feng W, Zhao X H, Ji L L, Cui Y, Zhou S L, Liu Z J, Zheng C Y, Wang L F, Gao Y Q, Huang X G, Fu S Z 2024 Phys. Rev. Lett. 132 035102 Google Scholar
[20]	Wang P P, An H H, Fang Z H, Xiong J, Xie Z Y, Wang C, He Z Y, Jia G, Wang R R, Zheng S, Xia L, Feng W, Shi H T, Wang W, Sun J R, Gao Y Q, Fu S Z 2024 Matter Radiat. Extrem. 9 015602 Google Scholar
[21]	Moody J, MacGowan B, Glenzer S, Kirkwood R, Kruer W, Montgomery D, Schmitt A, Williams E, Stone G 2000 Phys. Plasmas 7 2114 Google Scholar
[22]	Yao C, Li J, Hao L, Yan R, Wang C, Lei A L, Ding Y K, Zheng J 2024 Nucl. Fusion 64 106013 Google Scholar

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