- 必威体育下载

姓名
邮箱
手机号码
标题
留言内容
验证码

Abstract

Based on the standard k- εmodel, a gas flow calculation model in a curved capillary is established, and the flow process of helium working medium in a curved capillary with gradually changing curvature is numerically simulated. Compared with other methods of studying micro-scale gas flow, this simulation obtains the gas density distribution in the curved capillary more conveniently, and has the same variation trend as the experimental measurement of the plasma electron density distribution, and can predict the gas flow distribution in the tube more accurately. The situation provides a theoretical basis for designing the discharge capillary experiment. Based on this model, the gas flow process in the capillary of the one-sided direct flushing, double-sided hedging and “straight + curved” cascade acceleration structures are numerically simulated. The results and conclusions are summarized as follows. 1) Comparing with the single-sided straight-bent capillary structure, the gas density fluctuation between the left gas inlet and the right gas inlet of the double-sided hedging-bend capillary is smaller, the gas flow is more stable, and a relatively stable plasma density channel can be generated. 2) In the double-sided hedged curved capillary, a relatively uniform gas density distribution is formed between the two inlets of the capillary under the same inflation back pressure; further research results show that a more uniform plasma density distribution with different lengths can be obtained by controlling the position of the gas inlet. 3) In the “traight + curved” cascaded accelerating capillary structure, the diameter of the electron injection channel will affect the gas density distribution in the bend. When the diameter of the electron injection channel is small, the absolute pressure in the capillary is low. The larger pressure difference between them will lead to a higher gas flow rate in the elbow, which will increase the fluctuation of the gas density in the elbow; the final research shows that the diameters of the electron injection channel, 100 μm and 150 μm are more suitable for the application in the “direct + bend” cascade acceleration capillary structure design. In summary, the calculation model of gas flow in the curved capillary constructed in this paper can accurately predict the gas flow distribution in the tube. The double-sided hedged curved capillary can generate a relatively stable plasma density channel, and the electron injection channel diameters, 100 μm and 150 μm, are more suitable for application in the “straight + curved” cascade accelerating capillary structure design. The research results obtained are expected to provide theoretical guidance and technical support for the laser wake cascade acceleration experiment based on the curved capillary with gradually changing curvature.

Keywords:

Authors and contacts

Corresponding author:Liu Zhen-Yu,zhenyu.liu@sjtu.edu.cn

Funds:Project supported by the National Natural Science Foundation of China (Grant No. 11991074) and the 2022 Open Project of Key Laboratory for Laser Plasma (Ministry of Education), Shanghai Jiao Tong University, China.

FullText HTML: translate this paragraph

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]

Cited By

DownLoad: Full-Size Img PowerPoint

网格数	管内气体流速/(m·s^–1)	与前计算值的相对误差绝对值/%
6581	586	59.23
11524	368	29.50
26044	533	15.48
39977	452	4.63
70628	432	3.57
160003	448	—

DownLoad: CSV

	比热容/ (J·kg^–1)	导热系数/ (W·m^–1·K^–1)	黏度/ (Pa·s)	分子质量/ (kg·kmol^–1)
氦气	5193	0.152	1.99 × 10^–5	4.0026

DownLoad: CSV

[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]

[1]	Wan Cheng-Liang, Pan Yu-Zhou, Zhu Li-Ping, Li Peng-Fei, Zhang Hao-Wen, Zhao Zhuo-Yan, Yuan Hua, Fan Xu-Hong, Sun Wen-Sheng, Du Zhan-Hui, Chen Qian, Cui Ying, Liao Tian-Fa, Wei Xiao-Hui, Wang Tian-Qi, Chen Xi-Meng, Li Gong-Ping, Reinhold Schuch, Zhang Hong-Qiang.Production and measurement of MeV proton microbeams in atmospheric environment based on glass capillary. Acta Physica Sinica, 2024, 73(10): 104101.doi:10.7498/aps.73.20240301
[2]	Shi Zhi-Qi, He Xiao, Liu Lin, Chen De-Hua, Wang Xiu-Ming.Elastic wave propagation characteristics in unsaturated double-porosity medium under capillary pressure. Acta Physica Sinica, 2023, 72(6): 069101.doi:10.7498/aps.72.20222063
[3]	Zhu Xin-Zhe, Li Bo-Yuan, Liu Feng, Li Jian-Long, Bi Ze-Wu, Lu Lin, Yuan Xiao-Hui, Yan Wen-Chao, Chen Min, Chen Li-Ming, Sheng Zheng-Ming, Zhang Jie.Experimental study on capillary discharge for laser plasma wake acceleration. Acta Physica Sinica, 2022, 71(9): 095202.doi:10.7498/aps.71.20212435
[4]	Liu Tao, Zhao Yong-Peng, Cui Huai-Yu, Liu Xiao-Lin.Characteristics of gain in Ne-like Ar 69.8 nm laser pumped by capillary discharge based on double-pass amplification. Acta Physica Sinica, 2019, 68(2): 025201.doi:10.7498/aps.68.20181617
[5]	Lü Yue-Lan, Yin Xiang-Bao, Sun Wei-Min, Liu Yong-Jun, Yuan Li-Bo.Laser emission characteristics of the capillary of dye-doped liquid crystal. Acta Physica Sinica, 2018, 67(4): 044204.doi:10.7498/aps.67.20171844
[6]	Liu Tao, Zhao Yong-Peng, Ding Yu-Jie, Li Xiao-Qiang, Cui Huai-Yu, Jiang Shan.Characteristics of gain in Ne-like Ar 69.8 nm laser pumped by capillary discharge. Acta Physica Sinica, 2017, 66(15): 155201.doi:10.7498/aps.66.155201
[7]	Wang Tong, Wang Xiao-Fang.An analytic approach for density gradient injection in laser wake field acceleration. Acta Physica Sinica, 2016, 65(4): 044102.doi:10.7498/aps.65.044102
[8]	Zhao Yong-Peng, Li Lian-Bo, Cui Huai-Yu, Jiang Shan, Liu Tao, Zhang Wen-Hong, Li Wei.Intensity distribution of 69.8 nm laser pumped by capillary discharge. Acta Physica Sinica, 2016, 65(9): 095201.doi:10.7498/aps.65.095201
[9]	Zhou Hong-Wei, Wang Lin-Wei, Xu Sheng-Hua, Sun Zhi-Wei.Capillary-driven flow in tubes connected to the containers under microgravity condition. Acta Physica Sinica, 2015, 64(12): 124703.doi:10.7498/aps.64.124703
[10]	Gu Yu-Qiu, Ma Zhan-Nan, Zheng Wu-Di, Wang Xiao-Fang, Wu Yu-Chi, Zhu Bin, Dong Ke-Gong, Cao Lei-Feng, He Ying-Ling, Liu Hong-Jie, Hong Wei, Zhou Wei-Min, Zhao Zong-Qing, Zhang Bao-Han, Jiao Chun-Ye, Wen Xian-Lun, Zang Hua-Ping, Yu Jin-Qing, Wei Lai.Density measurement and MHD simulation ofgas-filled capillary discharge waveguide. Acta Physica Sinica, 2011, 60(9): 095202.doi:10.7498/aps.60.095202
[11]	Guo Tie-Ying, Lou Shu-Qin, Li Hong-Lei, Jian Shui-Sheng.Capillary drawing for fabrication of photonic crystal fibers: theoretical calculation and experiments. Acta Physica Sinica, 2009, 58(7): 4724-4730.doi:10.7498/aps.58.4724
[12]	Wang Jian, Gu Yu-Qiu, Cai Da-Feng, Jiao Chun-Ye, Wu Yu-Chi, He Ying-Ling, Teng Jian, Yang Xiang-Dong, Wang Lei, Zhao Zong-Qing.Photon acceleration in the laser wakefield. Acta Physica Sinica, 2008, 57(10): 6471-6475.doi:10.7498/aps.57.6471
[13]	Wei Zhong-Chao, Dai Qiao-Feng, Wang He-Zhou.Spectral properties of fcc-like cylindrical colloidal crystals. Acta Physica Sinica, 2006, 55(2): 733-736.doi:10.7498/aps.55.733
[14]	Chen Min, Sheng Zheng-Ming, Zheng Jun, Zhang Jie.Numerical simulation of acceleration of electrons and ions in the interaction of intense laser pulses with dense gaseous targets. Acta Physica Sinica, 2006, 55(5): 2381-2388.doi:10.7498/aps.55.2381
[15]	Cao Shi-Ying, Zhang Zhi-Gang, Chai Lu, Wang Qing-Yue, Yang Jian-Jun, Zhu Xiao-Nong.Dependence of spectrum broadening on inner diameter of capillary restricting the filamentation in high pressure gas. Acta Physica Sinica, 2006, 55(10): 5294-5297.doi:10.7498/aps.55.5294
[16]	Cao Shi-Ying, Wang Ying, Zhang Zhi-Gang, Chai Lu, Wang Qing-Yue, Yang Jian-Jun, Zhu Xiao-Nong.Spectrum evolution of filamentation restricted by capillary in high pressure gas. Acta Physica Sinica, 2006, 55(9): 4734-4738.doi:10.7498/aps.55.4734
[17]	Chen Bao-Zhen, Huang Zu-Qia.Efficiency of the third-order harmonic in gas-filled capillary driven by fs laser pulses. Acta Physica Sinica, 2005, 54(1): 113-116.doi:10.7498/aps.54.113
[18]	Zhao Yong-Peng, Cheng Yuan-Li, Wang Qi, Hayashi Yasushi, Hotta Eiki.The lasing time of soft x-ray laser pumped by capillary discharge. Acta Physica Sinica, 2005, 54(6): 2731-2734.doi:10.7498/aps.54.2731
[19]	Cheng Yuan-Li, Luan Bo-Han, Wu Yin-Chu, Zhao Yong-Peng, Wang Qi, Zheng Wu-Di, Peng Hui-Min, Yang Da-Wei.Effect of pre-pulses on capillary discharge soft x-ray laser. Acta Physica Sinica, 2005, 54(10): 4979-4984.doi:10.7498/aps.54.4979
[20]	Chen Bao-Zhen, Huang Zu-Qia.Theoretical description of four-wave mixing of femtosecond pulses in gas-filled capillary*. Acta Physica Sinica, 2004, 53(12): 4218-4223.doi:10.7498/aps.53.4218

Catalog

Vol. 72, Issue 18 - 2023-09-20

Metrics

Abstract views:3182
PDF Downloads:128
Cited By:0

Search

Article