Study of x-ray emission enhancement via a high-contrast femtosecond laser interacting with a solid foil

被引：99

作者：

Chen, L. M. ^{[1
,2
]}

Kando, M. ^{[1
]}

Xu, M. H. ^{[2
]}

Li, Y. T. ^{[2
]}

Koga, J. ^{[1
]}

Chen, M. ^{[2
]}

Xu, H. ^{[2
]}

Yuan, X. H. ^{[2
]}

Dong, Q. L. ^{[2
]}

Sheng, Z. M. ^{[2
,3
]}

Bulanov, S. V. ^{[1
,4
]}

Kato, Y. ^{[1
]}

Zhang, J. ^{[2
,3
]}

Tajima, T. ^{[1
]}

机构：

[1] Japan Atom Energy Agcy, Kansai Photon Sci Inst, Adv Photon Res Ctr, Kizu, Kyoto 6190215, Japan

[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China

[3] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China

[4] Russian Acad Sci, AM Prokhorov Inst Gen Phys, Moscow, Russia

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.100.045004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We observed the increase of the conversion efficiency from laser energy to K alpha x-ray energy (eta(K)) produced by a 60 fs frequency doubled high-contrast laser pulse focused on a Cu foil, compared to the case of the fundamental laser pulse. eta(K) shows a strong dependence on the nonlinearly modified rising edge of the laser pulse. It reaches a maximum for a 100 fs negatively modified pulse. The hot electron efficient heating leads to the enhancement of eta(K). This demonstrates that high-contrast lasers are an effective tool for optimizing eta(K), via increasing the hot electrons by vacuum heating.

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页数：4

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