-
激光聚变研究中，冲击波调控技术是实现靶丸压缩过程的熵增调谐，保证高性能内爆的关键实验技术．本文在十万焦耳激光装置上首次实现了0.375mm半径小尺度内爆靶丸下双台阶辐射驱动的高精度冲击波调控实验测量．针对小靶丸下VISAR诊断有效反射区域不足的问题，通过建立的球形反射面VISAR图像光强的理论计算方法，创新性地提出了利用 keyhole锥反射效应提升VISAR诊断空间区域的实验技术路线，使得小靶丸尺度下有效 VISAR 数据区域提升了近三倍．在实验中首次获得了整形内爆实验条件下低温液氘靶的冲击波测量实验数据，实现了高精度冲击波调控实验测量．实验发现，小时空尺度内爆设计条件下，由于反射冲击波的作用，激光参数的较小偏差都会对冲击波追赶后的传输行为产生显著影响，揭示了我国当前小靶丸尺度下高性能整形内爆物理过程中冲击波传输的多因素敏感性，以及冲击波调控实验对于内爆设计验证的重要性．本文提出的小靶丸冲击波调控实验技术，不仅为我国十万焦耳激光装置上整形脉冲下熵增调谐实验的开展提供了技术基础，也对基于球汇聚压缩的超高压物理研究具有重要意义．In the realm of laser fusion research, the precision of shock-timing technology is pivotal for attaining optimal adiabat tuning during the compression phase of fusion capsules, which is crucial for ensuring the high-performance implosion. The current main technological approach for shock-timing experiments is the use of keyhole targets and VISAR diagnostics to measure the shock velocity history. Nonetheless, this approach encounters limitations when scaling down to smaller capsules, primarily due to the reduced effective reflection area available for VISAR diagnostics. This study introduces a novel high-precision shock-timing experimental methodology for a double-step radiation-driven implosion with a 0.375mm radius capsule on a 100 kJ laser facility. By developing a theoretical framework for calculating the intensity of VISAR images with spherical reflective surfaces, an innovative experimental technical route is proposed to utilize the keyhole cone reflection effect to enhance the VISAR diagnostic spatial area, effectively increasing the effective data collection region by nearly threefold for small-scale capsules. The technique has been adeptly applied to measure shock waves in cryogenic liquid-deuterium-filled capsules under shaped implosion experimental conditions, obtaining high-precision shock-timing experimental data. Experimental data reveals that the application of this technology has markedly enhanced both the image quality and the precision of data analysis for shock wave velocity measurements in small-scale capsules. Furthermore, it has been discovered that under similar laser conditions, there exist considerable variations in the shock velocity profiles. Simulation analysis suggests that the differences in the "N+1" reflected shock wave's catching-up behavior, caused by minor variations in laser intensity, are the main reason for the substantial merge velocity differences. It is demonstrated that minor variations in laser parameters can significantly affect the transmission behavior of the shock wave. This experiment highlights the intricate sensitivity of shock wave transmission in the high-performance shaped implosion physics process at the current small capsule scale, and it is essential to conduct shock-timing experiments for precisely tuning the actual shock wave behavior. This research not only lays a robust technical foundation for the advancement of adiabat tuning experiments on China's 100 kJ laser facility but also carries profound implications for the ultra-high pressure physics research based on the spherical convergence effect.
-
Keywords:
- inertial confinement fusion /
- shock-timing /
- shaping laser /
- VISAR
-
[1] Lindl J 1995 Phys. Plasmas 2 3933
[2] Lindl J D, Amendt P, Berger R L, Gail Glendinning S, Glenzer S H, Haan S W, Kauffman R L, Landen O L, Suter L J 2004 Phys. Plasmas 11 339
[3] Atzeni S, Meyer-ter-vehn J (translated by Sheng B F) 2008 The Physics of Inertial Fusion (Beijing: Science Press) p41 (in Chinese) [Atzeni S, Meyer-ter-vehn J 著(沈百飞译) 2008 惯性聚变物理(北京:科学出版社) 第41页]
[4] Robey H F, MacGowan B J, Landen O L, LaFortune K N, Widmayer C, Celliers P M, Moody J D, Ross J S, Ralph J, LePape S, Berzak Hopkins L F, Spears B K, Haan S W, Clark D, Lindl J D and Edwards M J 2013 Phys. Plasmas 20 052707
[5] Dewald E L, Rosen M, Glenzer S H, Suter L J, Girard F, Jadaud J P, Schein J, Constantin C, Wagon F, Huser G, Neumayer P and Landen O L 2008 Phys. Plasmas 15 072706
[6] Haan S W, Pollaine S M, Lindl J D, Suter L J, Berger R L, Powers L V, Alley W E, Amendt P A, Futterman J A, Levedahl W K, Rosen M D, Rowley D P, Sacks R A, Shestakov A I, Strobel G L, Tabak M, Weber S V, Zimmerman G B 1995 Phys. Plasmas 2 2480
[7] Hu S X, Goncharov V N, Boehly T R, McCrory R L, Skupsky S, Collins L A, Kress J D, Militzer B 2015 Phys. Plasmas 22 056304
[8] Boehly T R, Munro D, Celliers P M, Olson R E, Hicks D G, Goncharov V N, Collins G W, Robey H F, Hu S X, Marozas J A, Sangster J C, Landen O L, Meyerhofer D D 2009 Phys. Plasmas 16 056302
[9] Celliers P M, Bradley D K, Collins G W, Hicks D G, Boehly T R, Armstrong W J 2004 Rev. Sci. Instrum. 75 4916
[10] Boehly T R, Goncharov V N, Seka W, Barrios M A, Celliers P M, Hicks D G, Collins G W, Hu S X, Marozas J A, Meyerhofer D D 2011 Phys. Rev. Lett. 106 195005
[11] Robey H F, Boehly T R, Celliers P M, Eggert J H, Hicks D, Smith R F, Collins R, Bowers M W, Krauter K G, Datte P S, Munro D H, Milovich J L, Jones O S, Michel P A, Thomas C A, Olson R E, Pollaine S, Town R P J, Haan S, Callahan D, Clark D, Edwards J, Kline J L, Dixit S, Schneider M B, Dewald E L, Widmann K, Moody J D, Döppner T, Radousky H B, Throop A, Kalantar D, DiNicola P, Nikroo A, Kroll J J, Hamza A V, Horner J B, Bhandarkar S D, Dzenitis E, Alger E, Giraldez E, Castro C, Moreno K, Haynam C, LaFortune K N, Widmayer C, Shaw M, Jancaitis K, Parham T, Holunga D M, Walters C F, Haid B, Mapoles E R, Sater J, Gibson C R, Malsbury T, Fair J, Trummer D, Coffee K R, Burr B, Berzins L V, Choate C, Brereton S J, Azevedo S, Chandrasekaran H, Eder D C, Masters N D, Fisher A C, Sterne P A, Young B K, Landen O L, Van Wonterghem B M, MacGowan B J, Atherton J, Lindl J D, Meyerhofer D D, Moses E 2012 Phys. Plasmas 19 042706
[12] Robey H F, Muncro D H, Spears B K, Marinak M M, Jones O S, Patel M V, Haan S W, Salmonson J D, Landen O L, Boehly T R, Nikroo A 2008 J. Phys.: Conf. Ser. 112 022078
[13] Robey H F, Celliers P M, Moody J D, Sater J, Parham T, Kozioziemski B, Dylla-Spears R, Ross J S, LePape S, Ralph J E, Hohenberger M, Dewald E L, Berzak Hopkins L, Kroll J J, Yoxall B E, Hamza A V, Boehly T R, Nikroo A, Landen O L, Edwards M J 2014 Phys. Plasmas 21 022703
[14] Robey H F, Celliers P M, Kline J L, Mackinnon A J, Boehly T R, Landen O L, Eggert J H, Hicks D, LePape S, Farley D R, Bowers M W, Krauter K G, Munro D H, Jones O S, Milovich J L, Clark D, Spears B K, Town R P J, Haan S W, Dixit S, Schneider M B, Dewald E L, Widmann K, Moody J D, Döppner T, Radousky H B, Nikroo A, Kroll J J, Hamza A V, Horner J B, Bhandarkar S D, Dzenitis E, Alger E, Giraldez E, Castro C, Moreno K, Haynam C, LaFortune K N, Widmayer C, Shaw M, Jancaitis K, Parham T, Holunga D M, Walters C F, Haid B, Malsbury T, Trummer D, Coffee K R, Burr B, Berzins L V, Choate C, Brereton S J, Azevedo S, Chandrasekaran H, Young B K, Edwards M J, Van Wonterghem B M, MacGowan B J, Atherton J, Lindl J D, Meyerhofer D D, Moses E 2012 Phys. Rev. Lett. 108 215004
[15] Zheng W G, Wei X F, Zhu Q H, Jing F, Hu D X, Yuan X D, Dai W J, Zhou W, Wang F, Xu D P, Xie X D, Feng B, Peng Z T, Guo L F, Chen Y B, Zhang X J, Liu L Q, Lin D H, Dang Z, Xiang Y, Zhang R, Wang F, Jia H T, Deng X W 2017 Matter Radiat. Extremes 2 243
[16] Yan J, Zhang X, Zheng J H, Yuan Y T, Kang D G, Ge F J, Chen L, Song Z F, Yuan Z, Jiang W, Yu B, Chen B L, Pu Y D, Huang T X 2015 Acta Phys. Sin. 64 125203 (in Chinese) [晏骥,张兴,郑建华,袁永腾,康洞国,葛峰骏,陈黎,宋仔峰,袁铮,蒋炜,余波,陈伯伦,蒲昱东,黄天晅 2015 物理学报 64 125203]
[17] Pu Y D, Kang D G, Huang T X, Gao Y M, Chen J B, Tang Q, Song Z F, Peng X S, Chen B L, Jiang W, Yu B, Yan J, Jiang S E, Liu S Y, Yang J M, Ding Y K 2014 Acta Phys. Sin. 63 125211 (in Chinese) [蒲昱东,康洞国,黄天晅,高耀明,陈家斌,唐琦,宋仔峰,彭晓世,陈伯伦,蒋炜,余波,晏骥,江少恩,刘慎业,杨家敏,丁永坤 2014 物理学报 63 125211]
[18] Huang T X, Wu C S, Chen Z J, Yan J, Li X, Ge F J, Zhang X, Jiang W, Deng B, Hou L F, Pu Y D, Dong Y S, Wang L F 2023 Acta Phys. Sin. 72 025201 (in Chinese) [黄天晅,吴畅书,陈忠靖,晏骥,李欣,葛峰峻,张兴,蒋炜,邓博,侯立飞,蒲昱东,董云松,王立锋 2023 物理学报 72 025201]
[19] Ge F J, Pu Y D, Wang K, Huang T X, Sun C K, Qi X B, Wu C S, Gu J F, Chen Z J, Yan J, Jiang W, Yang D, Dong Y S, Wang F, Zhou S Y, Ding Y K 2023 Nucl. Fusion 63 086033
[20] Philpott M K, George A, Whiteman G, De’Ath J, Millett J C F 2015 Meas. Sci. Technol. 26 125204
[21] Barker L 1998 AIP Conference Proceedings 429 833
[22] Li Z C, Jiang X H, Liu S Y, Huang T X, Zheng J, Yang J M, Li S W, Guo L, Zhao X F, Du H B, Song T M, Yi R Q, Liu Y G, Jiang S E, Ding Y K, 2010 Rev. Sci. Instrum. 81 073504
[23] Li Z C, Zhu X L, Jiang X H, Liu S Y, Zheng J, Li S W, Wang Z B, Yang D, Zhang H, Guo L, Xin J, Song T M, Ding Y K, Rev. Sci. Instrum. 82 106106
[24] Theobald W, Miller J E, Boehly T R, Vianello E, MeyerhoferD D, Sangster T C 2006 Phys. Plasmas 13 122702
[25] Celliers P M, Collins G W, Da Silva L B, Cauble R, Gold D M, Foord M E, Holmes N C, Hammel B A, Wallace R J, Ng A 2000 Phys. Rev. Lett. 84 5564
[26] Zaghoo M, Boehly T R, Rygg J R, Celliers P M, Hu S X, Collins G W 2019 Phys. Rev. Lett. 122 085001
[27] Erskine D, Eggert J, Celliers P, Hicks D 2017 AIP Conference Proceedings 1793 160016
[28] Ramis R, Schmalz R and Meyer-Ter-Vehn J 1988 Comput.Phys. Commun. 49 475
[29] Eidmann K 1994 Las. Part. Beams 12 223
[30] Landen O L, Caseya D T, DiNicola J M, Döppner T, Hartouni E P, Hinkel D E, Berzak Hopkins L F, Hohenberger M, Kritcher A L, LePape S, MacGowan B J, Maclaren S, Meaney K D, Millot M, Patel P K, Park J, Pickworth L A, Robey H F, Ross J S, Yang S T, Zylstra A B, Baker K L, Callahan D A, Celliers P M, Edwards M J, Hurricane O A, Lindl J D, Moody J D, Ralph J, Smalyuk V A, Thomas C A, Van Wonterghem B M, Weber C R 2020 High Energy Density Phys. 36 100755
计量
- 文章访问数: 112
- PDF下载量: 6
- 被引次数: 0
下载:
