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With the ionization mechanism for the transparent material under the super high pressure, the basic measurement method of shock wave has been analyzed. With the Drude-free electron model, the change in reflectivity of shock wave front under different pressures has been analyzed. The reflectivity of shock wave front for different probe lasers has been compared in theory. And it was found that the reflectivity of shock wave front for 660 nm of probe laser is higher than that for 532 nm. The effect of the detector was found to be caused by the X-ray ionization of the transparent material after analyzing the reflectivity data in space-time scale. From the experiment data, it is found that the beginning of "blank" effect coincides with the start point of laser pulse. The shock wave is later than the "blank" effect under the square laser pulse. In the experiment, the reflectivity of shock wave front is about 40% when the shock velocity is 35 km/s. The theoretical decreasing curve of shock velocity in the sapphire window is confirmed by the experiment data. The formula to calculate the shock wave velocity in the transparent material was deduced and verified.
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Keywords:
- shock wave /
- optical diagnosis /
- imaging /
- interfero meter
[1] Barker L M, Hollenbach R E 1972 J. Appl. Phys. 43 4669
[2] Hu S L 2001 Laser Interferometry for Measuring Velocities (Beijing: National Defence Industry Press) (in Chinese) [胡绍楼 2001 激光干涉测速技术(北京: 国防工业出版社)]
[3] Lu J X, Wang Z, Liang J, Shan Y S, Zhou C Z, Xiang W, Lu Z, Tang X Z 2006 High Power Laser and Particle Beams 18 799 (in Chinese) [路建新、 王 钊、 梁 晶、 单玉生、 周创志、 向 维、 陆 泽、 汤秀章 2006 强激光与粒子束 18 799]
[4] Chen Y J, Yang Y Y, Zhuo Y M,Yang L M 2006 Optical Instruments 28 71 (in Chinese) [陈阳杰、 杨甬英、 卓永模、 杨李铭 2006 光学仪器 28 71]
[5] Celliers P M, Bradley D K, Collins G W, Hicks D G, Boehly T R, Armstrong W J 2004 Rev. Sci. Instrum. 75 4916
[6] He M Q, Dong Q L, Sheng Z M, Weng S M, Chen M, Wu H C, Zhang J 2009 Acta Phys. Sin. 58 363 (in Chinese) [何民卿、 董全力、 盛政明、 翁苏明、 陈 民、 武慧春、 张 杰 2009 58 363]
[7] Zhang Y, Li Y T, Zheng Z Y, Liu F, Zhong J Y, Lin X X, Lu X, Liu F, Zhang J 2007 Chin. Phys. 16 3728
[8] Hicks D G, Celliers P M, Collins G W, Eggert J H, Moon S J 2003 Phys. Rev. Lett. 91 035502
[9] Theobald W, Miller J E, Boehly T R, Vianello E, Meyerhofer D D, Sangster T C, Eggert J, Celliers P M 2006 Phys. Plasmas 13 122702
[10] Celliers P M, Collins G W, Da Silva L B, Gold D M, Cauble R, Wallace R J, Foord M E, Hammel B A 2000 Phys. Rev. Lett. 84 5564
[11] Hicks D G, Celliers P M, Collins G W, Eggert J H, Moon S J 2006 Phys. Rev. Lett. 97 025502
[12] Celliers P M, Collins G W, Hicks D G, Koenig M, Henry E, Benuzzi-Mounaix A, Batani D, Bradley D K, Da Silva L B, Wallace R J, Moon S J, Eggert J H, Lee K K M, Benedetti L R, Jeanloz R, Masclet I, Dague N, Marchet B, Rabec Le Gloahec M, Reverdin Ch, Pasley J, Willi O, Neely D, Danson C 2004 Phys. Plasmas 11 L41
[13] Barker L M, Hollenbach R E 1970 J. Appl. Phys. 41 4208
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[1] Barker L M, Hollenbach R E 1972 J. Appl. Phys. 43 4669
[2] Hu S L 2001 Laser Interferometry for Measuring Velocities (Beijing: National Defence Industry Press) (in Chinese) [胡绍楼 2001 激光干涉测速技术(北京: 国防工业出版社)]
[3] Lu J X, Wang Z, Liang J, Shan Y S, Zhou C Z, Xiang W, Lu Z, Tang X Z 2006 High Power Laser and Particle Beams 18 799 (in Chinese) [路建新、 王 钊、 梁 晶、 单玉生、 周创志、 向 维、 陆 泽、 汤秀章 2006 强激光与粒子束 18 799]
[4] Chen Y J, Yang Y Y, Zhuo Y M,Yang L M 2006 Optical Instruments 28 71 (in Chinese) [陈阳杰、 杨甬英、 卓永模、 杨李铭 2006 光学仪器 28 71]
[5] Celliers P M, Bradley D K, Collins G W, Hicks D G, Boehly T R, Armstrong W J 2004 Rev. Sci. Instrum. 75 4916
[6] He M Q, Dong Q L, Sheng Z M, Weng S M, Chen M, Wu H C, Zhang J 2009 Acta Phys. Sin. 58 363 (in Chinese) [何民卿、 董全力、 盛政明、 翁苏明、 陈 民、 武慧春、 张 杰 2009 58 363]
[7] Zhang Y, Li Y T, Zheng Z Y, Liu F, Zhong J Y, Lin X X, Lu X, Liu F, Zhang J 2007 Chin. Phys. 16 3728
[8] Hicks D G, Celliers P M, Collins G W, Eggert J H, Moon S J 2003 Phys. Rev. Lett. 91 035502
[9] Theobald W, Miller J E, Boehly T R, Vianello E, Meyerhofer D D, Sangster T C, Eggert J, Celliers P M 2006 Phys. Plasmas 13 122702
[10] Celliers P M, Collins G W, Da Silva L B, Gold D M, Cauble R, Wallace R J, Foord M E, Hammel B A 2000 Phys. Rev. Lett. 84 5564
[11] Hicks D G, Celliers P M, Collins G W, Eggert J H, Moon S J 2006 Phys. Rev. Lett. 97 025502
[12] Celliers P M, Collins G W, Hicks D G, Koenig M, Henry E, Benuzzi-Mounaix A, Batani D, Bradley D K, Da Silva L B, Wallace R J, Moon S J, Eggert J H, Lee K K M, Benedetti L R, Jeanloz R, Masclet I, Dague N, Marchet B, Rabec Le Gloahec M, Reverdin Ch, Pasley J, Willi O, Neely D, Danson C 2004 Phys. Plasmas 11 L41
[13] Barker L M, Hollenbach R E 1970 J. Appl. Phys. 41 4208
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