Pulse energy of the extreme-ultraviolet free-electron laser at SPring-8 determined using a cryogenic radiometer

被引：27

作者：

Kato, M. ^{[1
,2
]}

Saito, N. ^{[1
,2
]}

Tanaka, T. ^{[1
,2
]}

Morishita, Y. ^{[1
]}

Kimura, H. ^{[2
,3
]}

Ohashi, H. ^{[2
,3
]}

Nagasono, M. ^{[2
]}

Yabashi, M. ^{[2
]}

Tono, K. ^{[2
]}

Togashi, T. ^{[2
,3
]}

Higashiya, A. ^{[2
]}

Ishikawa, T. ^{[2
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, NMIJ, Tsukuba, Ibaraki 3058568, Japan

[2] RIKEN, XFEL Project Head Off, Sayo, Hyogo 6795148, Japan

[3] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2009年 / 612卷 / 01期

关键词：

Free-electron laser; Cryogenic radiometer; Pulse energy; Higher-order harmonics; X-RAY INTENSITY; SYNCHROTRON-RADIATION; VACUUM;

D O I：

10.1016/j.nima.2009.10.141

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The pulse energy of an extreme-ultraviolet free-electron laser (EUV-FEL) has been directly measured using a cryogenic radiometer installed in an experimental station. The laser provided 21.0, 18.0, and 19.5 mu J/pulse at wavelengths of 51, 55, and 61 nm, respectively. The contribution of higher harmonics was estimated by measuring the attenuation of the average pulse energy with increasing At gas pressure in a gas cell. The ratio of the intensity of the higher harmonics to that of the fundamental was estimated to be about 1%. (C) 2009 Elsevier B.V. All rights reserved.

引用

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页码：209 / 211

页数：3

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