短脉冲强激光驱动磁重联过程的靶后电势分布特征

于家成; 仲佳勇; 安维明; 平永利

doi:10.7498/aps.70.20201339

摘要

超短超强激光因其极端的物理参数范围以及可用于研究相对论等离子体等特征, 成为当前激光驱动磁重联物理的研究热点. 通常采用两路激光与平面靶相互作用实现激光驱动磁重联, 然而在实验诊断中, 由于激光等离子体自身的复杂性导致很难辨别磁重联的物理特征. 本文对两路短脉冲激光驱动平面靶磁重联进行了数值模拟, 重点分析了靶后电势分布特征和磁重联之间的关系. 模拟结果显示, 靶后电势分布可以直接影响被加速离子在探测面上的空间分布, 因此可用来直接诊断短脉冲激光驱动磁重联实验.

关键词:

Abstract

Recently, the short-pulse intense laser has become a common tool for studying the relativistic plasma with tremendous physical parameters. And the laser-driven magnetic reconnection is one of the hot topics and has received much attention. The laser-driven magnetic reconnection experiments are usually conducted by closely focusing two laser beams on a planar coil target. However, it is always hard to distinguish the physical property of magnetic reconnection from the complex background of laser-produced plasma. In this paper, we present the particle-in-cell simulation results of magnetic reconnection driven by two short-pulse lasers as well as a single laser pulse irradiating the solid planar target, and discuss the correlation between the potential distribution behind the target and the magnetic reconnection. When a single laser is used, the potential behind the target shows a double-peak distribution, which is in agreement with recent experimental results. When two lasers irradiate the target, the potential behind the target shows a three-peak distribution. The accumulated spatial distribution of plasma ions with fixed energy (4.5 and 6 MeV) at 3 μm behind the target shows several peaks, which is in agreement with the potential distribution when either a single laser or two lasers are used. In addition, after the laser pulse terminates, in the two-laser case there is extremely strong effect on the topological structure of the electric field compared with in the singlelaser case. When the magnetic reconnection happens (which can be identified through the reconnection electric field and the electron energy spectrum), the amplitude of the x component of the electric field has different evolution characteristics from the single laser case. The line outs of the y component of the electric field in two cases also have completely different shapes. In summary, the simulation results reveal that the potential distribution behind the target can directly affect the spatial distribution of the accelerated ions. This could be possibly used to identify the short pulse laser-driven magnetic reconnection in experiment.

Keywords:

作者及机构信息

北京师范大学天文系, 北京　100875

通信作者: 仲佳勇, jyzhong@bnu.edu.cn

基金项目: 国家自然科学基金委员会-中国工程物理研究院NSAF联合基金(批准号: U1930108)、科学挑战计划(批准号: TZ2016005)、中国科学院战略重点研究计划(批准号: XDA25030700)和国家自然科学基金(批准号: 12075030)资助的课题

Authors and contacts

Department of Astronomy, Beijing Normal University, Beijing 100875, China

Corresponding author: Zhong Jia-Yong, jyzhong@bnu.edu.cn

Funds: Project supported by the NSAF Joint Fund of the National Natural Science Foundation of China and the China Academy of Engineering Physics (Grant No. U1930108), the Science Challenge Project, China (Grant No. TZ2016005), the Strategic Priority Research Program of Chinese Academy of Sciences, China (Grant No. XDA25030700), and the National Natural Science Foundation of China (Grant No. 12075030)

文章全文 : translate this paragraph

参考文献

[1]	Mei Z, Shen C, Wu N, Lin J, Murphy N A, Roussev I I 2012 Mon. Not. R. Astron. Soc. 425 2824 Google Scholar
[2]	Uzdensky D A, Cerutti B, Bgelman M C 2011 Astrophys. J. Lett. 737 L40 Google Scholar
[3]	Meng Y, Lin J, Zhang L, Reeves K K, Zhang Q S, Yuan F 2014 Astrophys. J. 785 62 Google Scholar
[4]	Gregory C D, Howe J, Loupias B, Myers S, Notley M M, Sakawa Y, Oya A, Kodama R, Koenig M, Woolsey N C 2008 Astrophys. J. 676 420
[5]	Werner G R, Uzdensky D A, Begelman M C, Cerutti B, Nalewajko K 2018 Mon. Not. R. Astron. Soc. 473 4840 Google Scholar
[6]	Nilson P M, Willingale L, Kaluza M C, et al. 2006 Phys. Rev. Lett. 97 255001 Google Scholar
[7]	Willingale L, Nilson P M, Kaluza M C, et al. 2010 Phys. Plasmas 17 043104 Google Scholar
[8]	Ryutov D D, Drake R P, Remington B A 2000 Astrophys. J. Suppl. Ser. 127 465 Google Scholar
[9]	Zhong J Y, Li Y T, Wang X G, et al. 2010 Nat. Phys. 6 984 Google Scholar
[10]	Masuda S, Kosugi T, Hara H, Tsuneta S, Ogawara Y 1994 Nature 371 495 Google Scholar
[11]	Wagner U, Tatarakis M, Gopal A, et al. 2004 Phys. Rev. E 70 026401 Google Scholar
[12]	Raymond A E, Dong C F, McKelvey A, et al. 2018 Phys. Rev. E 98 043207 Google Scholar
[13]	Ping Y L, Zhong J Y, Sheng Z M, Wang X G, Liu B, Li Y T, Yan X Q, He X T, Zhang J, Zhao G 2014 Phys. Rev. E 89 031101 Google Scholar
[14]	Gu Y J, Klimo O, Kumar D, Bulanov S V, Esirkepov T Z, Weber S, Korn G 2015 Phys. Plasmas 22 103113 Google Scholar
[15]	Guo F, Li H, Daughton W, Liu Y H, 2014 Phys. Rev. Lett. 113 155005 Google Scholar
[16]	Guo F, Li X, Daughton W, Kilian P, Li H, Liu Y H, Yan W C, Ma D 2019 Astrophys. J. Lett. 879 L23 Google Scholar
[17]	Kagan D, Sironi L, Cerutti B, Giannios D 2015 Space Sci. Rev. 191 545 Google Scholar
[18]	Arber T D, Bennett K, Brady C S, et al. 2015 Plasma Phys. Contr. F. 57 113001 Google Scholar
[19]	Chen M, Shenga Z M, Zheng J, Ma Y Y, Bari M A, Li Y T, Zhang J 2006 Opt. Express 14 3093 Google Scholar
[20]	Wilks S C, Langdon A B, Cowan T E, et al. 2001 Phys. Plasmas 8 542 Google Scholar
[21]	Sentoku Y, d’Humières E, Romagnani L, Audebert P, Fuchs J 2011 Phys. Rev. Lett. 107 135005 Google Scholar

施引文献

图 1 模拟区域内的激光和固体平面靶(黑色线框为模拟区域)　(a) 单束激光; (b) 两束激光

Fig. 1. Lasers and solid planar target in the simulation box (black wireframe serves as the simulation box): (a) Single laser; (b) two lasers.

下载: 全尺寸图片幻灯片

图 2 (a) 靶前和(b) 靶后的鞘层电场E_x随时间的变化

Fig. 2. Sheath electric field E_x curves over time at (a) the front target and (b) the rear target.

下载: 全尺寸图片幻灯片

图 3 (a) 单束激光(蓝色)和两束激光(橙色)对时间取平均后得到的靶后电势分布; (b) 磁重联过程的示意图

Fig. 3. (a) Electric potential distribution averaged over certain time at the target back obtained from the data of single laser (blue line) and two lasers (orange line) respectively; (b) the illustration of magnetic reconnection process.

下载: 全尺寸图片幻灯片

图 4 靶后离子分布的统计结果(灰色针状图)和拟合结果(黄色曲线), 其中X-Y平面的图像是粒子密度(单位经过了临界密度归一化处理); 红色箭头表示激光入射位置　(a) 单束激光模拟中的靶后4.5 MeV离子的分布; (b) 两束激光模拟中的靶后6 MeV离子的分布

Fig. 4. Ion distribution at target back from the statistical results (gray needle figure) and the fitting result (yellow curve): (a) 4.5 MeV ion distribution behind the target from simulation of single laser; (b) 6 MeV ion distribution behind the target from simulation of two lasers. Particle number density figure plots on X-Y plane. Laser incident point is marked by red arrows

下载: 全尺寸图片幻灯片

图 5 靶后1 μm沿Y轴的电场强度E_x和E_y, 时间分别为(a) 370, (b) 460, (c) 370和(d) 500 fs

Fig. 5. Electric field E_x and E_y over Y-axis at 1 μm behind the target for (a) 370, (b) 460, (c) 370, and (d) 500 fs.

下载: 全尺寸图片幻灯片

图 6 磁场B_z在(a) t = 370, (b) t = 380, (c) t = 390, (d) t = 400, (e) t = 410和(f) t = 460 fs的图像

Fig. 6. Figure of magnetic field B_z at (a) t = 370, (b) t = 380, (c) t = 390, (d) t = 400, (e) t = 410 and (f) t = 460 fs.

下载: 全尺寸图片幻灯片

图 7 靶后电子和离子的能谱, 统计选取的粒子及时间分别为(a) 电子300 fs、(b) 离子300 fs、(c) 电子400 fs、(d) 离子400 fs、(e) 电子500 fs和(f) 离子500 fs

Fig. 7. Electric and ionic energy spectra at (a) 300 fs (electron), (b) 300 fs (ion), (c) 400 fs (electron), (d) 400 fs (ion), (e) 500 fs (electron) and (f) 500 fs (ion).

下载: 全尺寸图片幻灯片

[1]	Mei Z, Shen C, Wu N, Lin J, Murphy N A, Roussev I I 2012 Mon. Not. R. Astron. Soc. 425 2824 Google Scholar
[2]	Uzdensky D A, Cerutti B, Bgelman M C 2011 Astrophys. J. Lett. 737 L40 Google Scholar
[3]	Meng Y, Lin J, Zhang L, Reeves K K, Zhang Q S, Yuan F 2014 Astrophys. J. 785 62 Google Scholar
[4]	Gregory C D, Howe J, Loupias B, Myers S, Notley M M, Sakawa Y, Oya A, Kodama R, Koenig M, Woolsey N C 2008 Astrophys. J. 676 420
[5]	Werner G R, Uzdensky D A, Begelman M C, Cerutti B, Nalewajko K 2018 Mon. Not. R. Astron. Soc. 473 4840 Google Scholar
[6]	Nilson P M, Willingale L, Kaluza M C, et al. 2006 Phys. Rev. Lett. 97 255001 Google Scholar
[7]	Willingale L, Nilson P M, Kaluza M C, et al. 2010 Phys. Plasmas 17 043104 Google Scholar
[8]	Ryutov D D, Drake R P, Remington B A 2000 Astrophys. J. Suppl. Ser. 127 465 Google Scholar
[9]	Zhong J Y, Li Y T, Wang X G, et al. 2010 Nat. Phys. 6 984 Google Scholar
[10]	Masuda S, Kosugi T, Hara H, Tsuneta S, Ogawara Y 1994 Nature 371 495 Google Scholar
[11]	Wagner U, Tatarakis M, Gopal A, et al. 2004 Phys. Rev. E 70 026401 Google Scholar
[12]	Raymond A E, Dong C F, McKelvey A, et al. 2018 Phys. Rev. E 98 043207 Google Scholar
[13]	Ping Y L, Zhong J Y, Sheng Z M, Wang X G, Liu B, Li Y T, Yan X Q, He X T, Zhang J, Zhao G 2014 Phys. Rev. E 89 031101 Google Scholar
[14]	Gu Y J, Klimo O, Kumar D, Bulanov S V, Esirkepov T Z, Weber S, Korn G 2015 Phys. Plasmas 22 103113 Google Scholar
[15]	Guo F, Li H, Daughton W, Liu Y H, 2014 Phys. Rev. Lett. 113 155005 Google Scholar
[16]	Guo F, Li X, Daughton W, Kilian P, Li H, Liu Y H, Yan W C, Ma D 2019 Astrophys. J. Lett. 879 L23 Google Scholar
[17]	Kagan D, Sironi L, Cerutti B, Giannios D 2015 Space Sci. Rev. 191 545 Google Scholar
[18]	Arber T D, Bennett K, Brady C S, et al. 2015 Plasma Phys. Contr. F. 57 113001 Google Scholar
[19]	Chen M, Shenga Z M, Zheng J, Ma Y Y, Bari M A, Li Y T, Zhang J 2006 Opt. Express 14 3093 Google Scholar
[20]	Wilks S C, Langdon A B, Cowan T E, et al. 2001 Phys. Plasmas 8 542 Google Scholar
[21]	Sentoku Y, d’Humières E, Romagnani L, Audebert P, Fuchs J 2011 Phys. Rev. Lett. 107 135005 Google Scholar

[1]	杨温渊, 董烨, 孙会芳, 董志伟. 磁绝缘线振荡器中模式竞争的物理分析和数值模拟. 物理学报, 2020, 69(19): 198401. doi: 10.7498/aps.69.20200383
[2]	杨玉晶, 赵汗青, 王鹏飞, 林婷婷. 绝热脉冲磁共振地下水探测技术数值模拟及影响分析. 物理学报, 2020, 69(12): 123301. doi: 10.7498/aps.69.20200015
[3]	王琳, 魏来, 王正汹. 垂直磁重联平面的驱动流对磁岛链影响的模拟. 物理学报, 2020, 69(5): 059401. doi: 10.7498/aps.69.20191612
[4]	成玉国, 夏广庆. 感应式脉冲推力器中等离子体加速数值研究. 物理学报, 2017, 66(7): 075204. doi: 10.7498/aps.66.075204
[5]	原晓霞, 仲佳勇. 双等离子体团相互作用的磁流体力学模拟. 物理学报, 2017, 66(7): 075202. doi: 10.7498/aps.66.075202
[6]	张凯, 仲佳勇, 裴晓星, 李玉同, 阪和洋一, 魏会冈, 袁大伟, 李芳, 韩波, 王琛, 贺昊, 尹传磊, 廖国前, 方远, 杨骕, 远晓辉, 梁贵云, 王菲鹿, 朱健强, 丁永坤, 张杰, 赵刚. 激光驱动磁重联过程中的喷流演化和电子能谱测量. 物理学报, 2015, 64(16): 165201. doi: 10.7498/aps.64.165201
[7]	蒋勇, 贺少勃, 袁晓东, 王海军, 廖威, 吕海兵, 刘春明, 向霞, 邱荣, 杨永佳, 郑万国, 祖小涛. CO2激光光栅式扫描修复熔石英表面缺陷的实验研究与数值模拟. 物理学报, 2014, 63(6): 068105. doi: 10.7498/aps.63.068105
[8]	黄培培, 刘大刚, 刘腊群, 王辉辉, 夏梦局, 陈颖. 单路脉冲功率真空装置的三维数值模拟研究. 物理学报, 2013, 62(19): 192901. doi: 10.7498/aps.62.192901
[9]	赵庆凯, 陈小刚, 崔继峰. 外加直流电场作用下高阶弱非线性复合介质的电势分布. 物理学报, 2013, 62(10): 107201. doi: 10.7498/aps.62.107201
[10]	欧阳建明, 马燕云, 邵福球, 邹德滨, 刘建勋. 高空核爆炸X射线电离的时空分布数值模拟. 物理学报, 2012, 61(24): 242801. doi: 10.7498/aps.61.242801
[11]	刘腊群, 刘大刚, 王学琼, 杨超, 夏蒙重, 彭凯. 磁绝缘传输线中心汇流区电子能量沉积及温度变化的数值模拟研究. 物理学报, 2012, 61(16): 162902. doi: 10.7498/aps.61.162902
[12]	李哲, 江海河, 王礼, 杨经纬, 吴先友. 2 m Cr,Tm,Ho:YAG激光热退偏效应的数值模拟及实验研究. 物理学报, 2012, 61(4): 044205. doi: 10.7498/aps.61.044205
[13]	石玗, 郭朝博, 黄健康, 樊丁. 脉冲电流作用下TIG电弧的数值分析. 物理学报, 2011, 60(4): 048102. doi: 10.7498/aps.60.048102
[14]	花金荣, 祖小涛, 李莉, 向霞, 陈猛, 蒋晓东, 袁晓东, 郑万国. 熔石英亚表面三维Hertz锥形划痕附近光强分布的数值模拟. 物理学报, 2010, 59(4): 2519-2524. doi: 10.7498/aps.59.2519
[15]	邓一鑫, 涂成厚, 吕福云. 非线性偏振旋转锁模自相似脉冲光纤激光器的研究. 物理学报, 2009, 58(5): 3173-3178. doi: 10.7498/aps.58.3173
[16]	张志锋, 张鹤鸣, 胡辉勇, 宣荣喜, 宋建军. 应变Si沟道nMOSFET阈值电压模型. 物理学报, 2009, 58(7): 4948-4952. doi: 10.7498/aps.58.4948
[17]	王雨虹, 王江安, 任席闯. 激光空泡特性实验与数值计算研究. 物理学报, 2009, 58(12): 8372-8378. doi: 10.7498/aps.58.8372
[18]	钱仙妹, 朱文越, 饶瑞中. 非均匀湍流路径上光传播数值模拟的相位屏分布. 物理学报, 2009, 58(9): 6633-6639. doi: 10.7498/aps.58.6633
[19]	郭文琼, 周晓军, 张雄军, 隋展, 吴登生. 等离子体电极普克尔盒电光开关单脉冲过程数值模拟. 物理学报, 2006, 55(7): 3519-3523. doi: 10.7498/aps.55.3519
[20]	訾炳涛, 姚可夫, 许光明, 崔建忠. 脉冲磁场下金属熔体凝固流场的数值模拟. 物理学报, 2003, 52(1): 115-119. doi: 10.7498/aps.52.115

计量

文章访问数: 4506
PDF下载量: 64
被引次数: 0

姓名
邮箱
手机号码
标题
留言内容
验证码

搜索

留言板

短脉冲强激光驱动磁重联过程的靶后电势分布特征