XIAO Yangyang; WANG Xiaofang

doi:10.7498/aps.74.20250144

Abstract

The interaction of a high-intensity laser with a solid target generates a large number of hot electrons. When these hot electrons are transported in the target material, X-rays, including Kα line and bremsstrahlung emissions are produced. The contrast of Kα line emission, i.e. the intensity of Kα line relative to the intensity of bremsstrahlung continua around the Kα line, depends on the anisotropy of the bremsstrahlung emission and is related to the energy and transportation of the hot electrons. In the past, some researchers used axial or annular magnetic fields to collimate hot electrons, but whether these magnetic fields can enhance the contrast of Kα emission has not been studied. In the present work, the effect of an axially uniform magnetic field or an annular magnetic field with a Gaussian distribution on the contrast of Cu Kα emission is investigated by Monte Carlo simulations. The simulation results and analysis show that the axially uniform magnetic field cannot strengthen the anisotropy of bremsstrahlung emission, so it cannot enhance the contrast of Kα emission efficiently. For the annular magnetic field with a Gaussian distribution, when an electron beam with a Boltzmann energy distribution is incident, due to the weak anisotropy of bremsstrahlung emission by low-energy electrons in the electron beam, the increase of Kα emission contrast is small. When an electron beam with a Boltzmann energy distribution, in which the low-energy part is cut off, or a mono-energetic electron beam is incident, the annular magnetic field with a Gaussian distribution significantly enhances the contrast of Kα emission in the back direction of the electron beam incidence. For an incident electron beam with an energy value in a range of 200–1000 keV, an annular magnetic field with a Gaussian distribution and a peak value of approximately 100 T is optimal for enhancing the contrast of Kα emission. Considering the existing experiments on generating annular magnetic fields and non-Boltzmann energy distribution hot electrons, it is possible to generate higher contrast Kα emissions with the enhancement of magnetic field in future experiments.

Keywords:

Authors and contacts

Corresponding author: WANG Xiaofang, wang1@ustc.edu.cn

Funds: Project supported by the Foundation of Science and Technology on Plasma Physics Laboratory, China (Grant No. 6142A04220106).

FullText HTML

References

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]

Cited By

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

map

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]

[1]	ZHOU Zimu, CUI Chenhui, LI Songlin, XU Yihui, TIAN Feng, ZHOU Ping, ZHANG Mingjun, GUO Zhi, TAI Renzhong. Full-process simulation of XPCS speckle dynamics based on Monte Carlo method and analysis of key parameter dependencies. Acta Physica Sinica, 2025, 74(18): 180201. doi: 10.7498/aps.74.20250673
[2]	XING Tian, LIU Shuhuan, WANG Xuan, WANG Chao, ZHOU Junye, ZHANG Ximin, CHEN Wei. Monte Carlo simulations of proton-induced displacement damage in SiGe alloys and SiGe/Si heterostructures. Acta Physica Sinica, 2025, 74(16): 162401. doi: 10.7498/aps.74.20250162
[3]	YAN Tong, LIU Aihua, JIAO Liguang. Electronic screening effects during bremsstrahlung of carbon atoms and ions. Acta Physica Sinica, 2025, 74(3): 033402. doi: 10.7498/aps.74.20241638
[4]	Li Bo, Li Ling, Zhu Jing-Jun, Lin Wei-Ping, An Zhu. Measurements of K-shell ionization cross sections and L-shell X-ray production cross sections of Al, Ti, Cu, Ag, and Au thin films by low-energy electron impact. Acta Physica Sinica, 2022, 71(17): 173402. doi: 10.7498/aps.71.20220162
[5]	Xun Zhi-Peng, Hao Da-Peng. Monte Carlo simulation of bond percolation on square lattice with complex neighborhoods. Acta Physica Sinica, 2022, 71(6): 066401. doi: 10.7498/aps.71.20211757
[6]	Wang Li-Min, Duan Bing-Huang, Xu Xian-Guo, Li Hao, Chen Zhi-Jun, Yang Kun-Jie, Zhang Shuo. Simulation of neutron irradiation damage in lead lanthanum zirconate titanate by Monte Carlo method. Acta Physica Sinica, 2022, 71(7): 076101. doi: 10.7498/aps.71.20212041
[7]	Tian Zi-Ning, Ouyang Xiao-Ping, Chen Wei, Wang Xue-Mei, Deng Ning, Liu Wen-Biao, Tian Yan-Jie. Source boundary parameter of Monte Carlo inversion technology based on virtual source principle. Acta Physica Sinica, 2019, 68(23): 232901. doi: 10.7498/aps.68.20191095
[8]	Qian Yu-Rui, Wu Ying, Yang Xia-Tong, Chen Qiu-Xiang, You Jun-Dong, Wang Bao-Yi, Kuang Peng, Zhang Peng. Experimental study on Ti K shell ionization cross sections induced by 8-9.5 keV positrons. Acta Physica Sinica, 2018, 67(19): 192101. doi: 10.7498/aps.67.20180666
[9]	Hua Yu-Chao, Dong Yuan, Cao Bing-Yang. Monte Carlo simulation of phonon ballistic diffusive heat conduction in silicon nanofilm. Acta Physica Sinica, 2013, 62(24): 244401. doi: 10.7498/aps.62.244401
[10]	Lan Mu, Xiang Gang, Gu Gang-Xu, Zhang Xi. A Monte Carlo simulation study on growth mechanism of horizontal nanowires on crystal surface. Acta Physica Sinica, 2012, 61(22): 228101. doi: 10.7498/aps.61.228101
[11]	Fan Xiao-Hui, Zhao Xing-Yu, Wang Li-Na, Zhang Li-Li, Zhou Heng-Wei, Zhang Jin-Lu, Huang Yi-Neng. Monte Carlo simulations of the relaxation dynamics of the spatial relaxation modes in the molecule-string model. Acta Physica Sinica, 2011, 60(12): 126401. doi: 10.7498/aps.60.126401
[12]	Zhang Wen. Micro-gravity effect in a magnetic field. Acta Physica Sinica, 2009, 58(4): 2405-2409. doi: 10.7498/aps.58.2405
[13]	Chen Shan, Wu Qing-Yun, Chen Zhi-Gao, Xu Gui-Gui, Huang Zhi-Gao. Ferromagnetism of C doped ZnO: first-principles calculation and Monte Carlo simulation. Acta Physica Sinica, 2009, 58(3): 2011-2017. doi: 10.7498/aps.58.2011
[14]	Xiong Kai-Guo, Feng Guo-Lin, Hu Jing-Guo, Wan Shi-Quan, Yang Jie. Monte Carlo simulation of the record-breaking high temperature events of climate changes. Acta Physica Sinica, 2009, 58(4): 2843-2852. doi: 10.7498/aps.58.2843
[15]	Gao Fei, Ryoko Yamada, Mitsuo Watanabe, Liu Hua-Feng. Use of Monte Carlo simulations for the scatter events analysis of PET scanners. Acta Physica Sinica, 2009, 58(5): 3584-3591. doi: 10.7498/aps.58.3584
[16]	Xu Lan-Qing, Li Hui, Xiao Zheng-Ying. Discussion on backscattered photon numbers and their scattering events in a turbid media. Acta Physica Sinica, 2008, 57(9): 6030-6035. doi: 10.7498/aps.57.6030
[17]	Zhang Zhu-Hua, Guo Wan-Lin, Guo Yu-Feng. The effects of axial magnetic field on electronic properties of carbon nanotubes. Acta Physica Sinica, 2006, 55(12): 6526-6531. doi: 10.7498/aps.55.6526
[18]	He Qing-Fang, Xu Zheng, Liu De-Ang, Xu Xu-Rong. Monte Carlo simulation of the effect of impact ionization in thin-film electroluminescent devices. Acta Physica Sinica, 2006, 55(4): 1997-2002. doi: 10.7498/aps.55.1997
[19]	Wang Zhi-Jun, Dong Li-Fang, Shang Yong. Monte Carlo simulation of optical emission spectra in electron assisted chemical vapor deposition of diamond. Acta Physica Sinica, 2005, 54(2): 880-885. doi: 10.7498/aps.54.880
[20]	Wang Jian-Hua, Jin Chuan-En. Application of Monte Carlo simulation to the research of ions transport plasma sheaths of glow discharge. Acta Physica Sinica, 2004, 53(4): 1116-1122. doi: 10.7498/aps.53.1116

Catalog

Vol. 74, Issue 13 - 2025-07-05

Metrics

Abstract views: 2365
PDF Downloads: 112
Cited By: 0

姓名
邮箱
手机号码
标题
留言内容
验证码

Search

Article

留言板

Abstract

Authors and contacts

Corresponding author: WANG Xiaofang, wang1@ustc.edu.cn

FullText HTML

References

Cited By

Catalog

Metrics

Authors

Referees

About Journal

About

Search

Article

留言板

Abstract

Authors and contacts

Corresponding author: WANG Xiaofang, wang1@ustc.edu.cn

FullText HTML

References

Cited By

Catalog

Metrics

Publishing process

Authors

Referees

About Journal

About