Astrophysical jet experiments with colliding laser-produced plasmas

被引：43

作者：

Gregory, C. D. ^{[1
]}

Howe, J. ^{[1
]}

Loupias, B. ^{[2
]}

Myers, S. ^{[1
]}

Notley, M. M. ^{[3
]}

Sakawa, Y. ^{[4
]}

Oya, A. ^{[5
]}

Kodama, R. ^{[5
]}

Koenig, M. ^{[2
]}

Woolsey, N. C. ^{[1
]}

机构：

[1] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

[2] CNRS CEA Univ, Paris Ecole Polytech 4, Lab Utilisat Lasers Intenses, UMR 7605, F-91128 Palaiseau, France

[3] Rutherford Appleton Lab, Cent Laser Facil, Sci Technol Facil Council, Didcot OX11 0QX, Oxon, England

[4] Osaka Univ, Inst Laser Engn, Osaka 5650871, Japan

[5] Osaka Univ, Grad Sch Engn, Osaka 5650871, Japan

来源：

ASTROPHYSICAL JOURNAL | 2008年 / 676卷 / 01期

关键词：

hydrodynamics; ISM : jets and outflows; methods : laboratory; plasmas;

D O I：

10.1086/527352

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Presented are the results of experiments in which jets are created through the collision of two laser-produced plasmas. These experiments use a simple "v-foil" target design: two thin foils are placed at an angle of 140 degrees to each other and irradiated with a high-energy laser. The plasmas from the rear face of these foils collide and drive plasma jets moving with a velocity of similar to 300 km s(-1). By carefully choosing the foil thickness and material to suit the laser conditions available, it has proven possible to create plasma jets for which the relevant scaling parameters show significant overlap with those of outflows associated with young stellar objects (YSOs). Preliminary results are also shown from experiments to study the effect of an ambient gas on jet propagation. Nominally identical experiments are conducted either in vacuum or in an ambient medium of 5 mbar of nitrogen gas. The gas is seen to increase the jet collimation and to introduce shock structures at the head of the outflow.

引用

页码：420 / 426

页数：7

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