Collection Of theses on high power laser and plasma physics, 2014, 12 (1): 1737, Published Online: May. 27, 2017  

X-ray line profile measurements in laser produced plasma

Author Affiliations
上海激光等离子体研究所, 上海 201800
Abstract
This paper explores the parameter measurement in laser produced plasma by X-ray line profile spectrscopy. The experiment was conducted on the SG-II laser facility. A 0.35 μm laser beam was focused on a solid chlorine (Cl) target in a vacuum chamber to produce a laser chlorine plasma and the high resolution X-ray elliptical bent crystal spectrograph was used to obtain the X-ray fine structure energy spectrum of the chlorine plasma radiation. The line integrated intensity ratio between H-like Cl (1s-3p) (Lyman-) and He-like Cl (1s2-1s3p) (He-) transitions was used for calculation of the electron temperature. By assuming optically thin, the Lyman-stark broadened profile was utilized to measure the electron density. Obtained experimental results show that the volume averaged electron temperature of Te is about 450 eV and the electron density of Ne is approximately 7.5×1022 cm-3. In addition, the line Full Width at Half Maximum (FWHM) was analyzed. The uncertainty in Ne due to uncertainties in the temperature and the assumed background level was also simply discussed and it is estimated to be within 25%. As a result, the experimental spectroscopic method may become a reference for diagnosing future higher-compression implosions.
References

[1] KEY M H, CABLE M D, COWAN T E, et al..Hot electron production and heating by hot electrons in fast ignition research [J].Phys.Plasmas, 1998, 5(5): 1966-1972.

[2] FILEVICH J, ROCCA J J, JANKOWSKA E, et al..Two-dimensional effects in laser-created plasmas measured with soft-x-ray laser interferometry [J].Phys.Rev.E, 2003, 67: 056409-1-6.

[3] DASILA L B, BARBEE T W, CAUBLE Jr R, et al..Electron density measurements of high density plasmas using soft-x-ray laser interferometry [J].Phys.Rev.Lett., 1995, 74(20): 3991-3994.

[4] 郑无敌, 张国平, 王琛, 等.用X射线激光M-Z干涉仪诊断点聚焦CH等离子体电子密度[J].物理学报, 2007, 56 (7): 3984-3989.

    ZHENG W D, ZHANG G P, WANG CH, et al..Diagnosis of electron density in spot-focused CH plasma with x-ray laser M-Z interferometer [J].Acta Phys.Sin., 2007, 56(7): 3984-3989.(in Chinese)

[5] HARILAL S S, BINDHU C V, ISSAC R C, et al..Electron density and temperature measurements in a laser produced carbon plasma [J].J.Appl.Phys. B, 1997, 82(2): 2140-2146.

[6] HANS R G.Stark broadening of isolated spectral lines from heavy elements in a plasma [J].Phys.Rev., 1962, 128(2): 515-523.

[7] YAAKOBI B, STEEL D, THORSOS E, et al..Explosive-pusher-type laser comprison experiments with non-filled microballoons [J].Phys.Rev.A, 1979, 19(3): 1247-1262.

[8] HARILAL S S, BINDHU C V, ISSAC R C, et al..Electron density and temperature measurements in a laser produced carbon plasma[J].J.Appl.Phys., 1997, 82: 2140.

[9] 王瑞荣, 陈伟民.椭圆型晶体谱仪谱测量的解谱[J].光学精密工程, 2009, 17(2): 274-279.

    WANG R R, CHEN W M.Unfolded study on spectra by elliptical crystal spectrometer [J].Opt.Precision Eng., 2009, 17(2): 274-279.(in Chinese)

[10] 王瑞荣, 熊俊, 王伟, 等.高度离化的钼离子细致结构能谱测量[J].物理学报, 2012, 61(24): 242901-1-6.

    WANG R R, XIONG J, WANG W, et al..Measurement of fine structure spectra in high-stripped states laser-produced Mo plasma [J].Acta Phys.Sin., 2012, 61(24): 242901-1-6.(in Chinese)

[11] 孙景文.高温等离子体X射线谱学[M].北京: 国防工业出版社, 2003.

    SUN J W.High-temperature Plasma X-ray Spectroscopy[M].Beijing: National Defense Industry Press, 2003.(in Chinese)

[12] 王瑞荣, 陈伟民, 王伟.椭圆弯晶谱仪波长分辨能力的改进[J].光学精密工程, 2010, 18(6): 1303-1308.

    WANG R R, CHEN W M, WANG W.Improvement of spectral resolution power for an elliptically curved crystal spectrometer [J].Opt.Precision Eng., 2010, 18(6): 1303-1308.(in Chinese)

WANG Rui-rong, WANG Wei. X-ray line profile measurements in laser produced plasma[J]. Collection Of theses on high power laser and plasma physics, 2014, 12(1): 1737.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!