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A strong pressure increase is produced by X-ray heating a foam-solid target in comparison with heating directly the solid target, due to impedance mismatch at the foam-solid interface. We study the pressure increase of CH foam-aluminum target, and find that only by shock present in foam can the ablative pressure in aluminum increase. In this paper an analytical model based on strong wave assumption is developed to study the shock impedance mismatching crossing the interface and the interaction of rarefaction with shock. We evaluate the shock pressure amplified in the aluminum layer as a function of density and adiabatic exponent, and show that the amplified pressure is a short high pressure pulse which is destroyed by rarefactions. This is in agreement with simulation results by MULTI code.
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Keywords:
- foam /
- shock wave /
- impedance mismatching /
- pressure increase
[1] Dunne D, Borghesi M, Iwase A, Jones M W, Taylor R, Willi O 1995 Phys. Rev. Lett. 75 3858
[2] Lindl J 1995 Phys. Plasmas 2 3933
[3] Willi O, Barringer L, Bell A, Borghesi M, Davies J, Gaillard R, Iwase A, MacKinnon A, Malka G, Meyer C, Nuruzzaman S, Taylor R, Vickers C, Hoarty D, Gobby P, Johnson R, Watt R G, Blanchot N, Canaud B, Croso H, Meyer B, Miquel J L, Reverdin C, Pukhov A, Meyer-ter-Vehn J 2000 Nucl.Fusion 40 537
[4] Hall T, Batani D, Nazarov W, Koenig M, Benuzzi A 2002 Laser Part. Beams 20 303
[5] Temporal M, Atzeni S, Batani D, Koenig M 2000 Eur. Phys. J. D 12 509
[6] Atzeni S, Meyer-ter-Vehn J 2004 The physics of inertial fusion (Oxford: Clarendon Press) p220
[7] LiWX 2003 One-Dimensional Nonsteady Flow and Shock Waves p270 (in Chinese) [李维新 2003 一维不定常流与冲击波 (北京：国防工业出版社) 第270页]
[8] Zhang Y, Zheng Z Y, Li Y T, Liu F, Li H M, Lu X, Zhang J 2007 Acta Phys. Sin. 56 5931 (in Chinese) [张翼, 郑志远, 李玉同, 刘峰, 李汉明, 鲁欣, 张杰 2007 56 5931]
[9] Ramis R, Schmalz R, Meyer-Ter-Vehn J 1988 Comput. Phys. Commun. 49 475
[10] Wang F, Peng X S, Liu S Y, Li Y S, Jiang X H, Ding Y K 2011 Acta Phys. Sin 60 025202 (in Chinese) [王峰, 彭晓世, 刘慎业, 李永升, 蒋小华, 丁永坤 2011 60 025202]
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[1] Dunne D, Borghesi M, Iwase A, Jones M W, Taylor R, Willi O 1995 Phys. Rev. Lett. 75 3858
[2] Lindl J 1995 Phys. Plasmas 2 3933
[3] Willi O, Barringer L, Bell A, Borghesi M, Davies J, Gaillard R, Iwase A, MacKinnon A, Malka G, Meyer C, Nuruzzaman S, Taylor R, Vickers C, Hoarty D, Gobby P, Johnson R, Watt R G, Blanchot N, Canaud B, Croso H, Meyer B, Miquel J L, Reverdin C, Pukhov A, Meyer-ter-Vehn J 2000 Nucl.Fusion 40 537
[4] Hall T, Batani D, Nazarov W, Koenig M, Benuzzi A 2002 Laser Part. Beams 20 303
[5] Temporal M, Atzeni S, Batani D, Koenig M 2000 Eur. Phys. J. D 12 509
[6] Atzeni S, Meyer-ter-Vehn J 2004 The physics of inertial fusion (Oxford: Clarendon Press) p220
[7] LiWX 2003 One-Dimensional Nonsteady Flow and Shock Waves p270 (in Chinese) [李维新 2003 一维不定常流与冲击波 (北京：国防工业出版社) 第270页]
[8] Zhang Y, Zheng Z Y, Li Y T, Liu F, Li H M, Lu X, Zhang J 2007 Acta Phys. Sin. 56 5931 (in Chinese) [张翼, 郑志远, 李玉同, 刘峰, 李汉明, 鲁欣, 张杰 2007 56 5931]
[9] Ramis R, Schmalz R, Meyer-Ter-Vehn J 1988 Comput. Phys. Commun. 49 475
[10] Wang F, Peng X S, Liu S Y, Li Y S, Jiang X H, Ding Y K 2011 Acta Phys. Sin 60 025202 (in Chinese) [王峰, 彭晓世, 刘慎业, 李永升, 蒋小华, 丁永坤 2011 60 025202]
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