A new hybrid target concept for multi-keV X-ray sources

被引：17

作者：

Primout, M. ^{[1
]}

Babonneau, D. ^{[1
]}

Jacquet, L. ^{[1
]}

Villette, B. ^{[1
]}

Girard, F. ^{[1
]}

Brebion, D. ^{[1
]}

Stemmler, P. ^{[1
]}

Fournier, K. B. ^{[2
]}

Marrs, R. ^{[2
]}

May, M. J. ^{[2
]}

Heeter, R. F. ^{[2
]}

Wallace, R. J. ^{[2
]}

Nishimura, H. ^{[3
]}

Fujioka, S. ^{[3
]}

Tanabe, M. ^{[3
]}

Nagai, H. ^{[3
]}

机构：

[1] CEA, DAM, DIF, F-91297 Arpajon, France

[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[3] Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan

来源：

HIGH ENERGY DENSITY PHYSICS | 2013年 / 9卷 / 04期

关键词：

X-ray sources; Radiative hydrodynamics; Titanium; Silicon dioxide aerogel; Omega laser; Gekko laser; LASER; PROPAGATION;

D O I：

10.1016/j.hedp.2013.09.002

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A novel concept for using hybrid targets to create multi-key X-ray sources was tested on the GEKKO XII facility of the OSAKA University and on the OMEGA facility of the University of Rochester. The sources were made via laser irradiation of a titanium foil placed at the end of a plastic cylinder, filled with a very low-density (2 and 5 mg/cm(3)) silicon-dioxide aerogel that was designed to control the longitudinal expansion of the titanium plasma. Preliminary calculations were used to determine optimal conditions for the aerogel density, cylinder diameter and length that maximize multi-keV X-ray emission. The X-ray emission power was measured on OMEGA using absolutely calibrated broad-band, diode-based CEA diagnostics, in addition to high resolution crystal spectrometers. On GEKKO XII, the heat wave propagation velocity in the aerogel was also measured with an X-ray framing camera. The advantage of using the thermal wave generated in the aerogel to heat a solid material to increase the conversion efficiency has not been fully demonstrated in these experiments. However, it was shown that a 5 mg/cm(3) aerogel placed in front of a titanium foil can improve the x-ray conversion efficiency with respect to the case of 2 mg/cm(3) for some target diameter and length. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：750 / 760

页数：11

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