Complete characterization of SU5: a VUV high resolution beamline with variable polarizations

被引：18
|
作者：
Nahon, L
Polack, F
Lagarde, B
Thissen, R
Alcaraz, C
Dutuit, O
Ito, K
机构：
[1] Univ Paris 11, LURE, F-91898 Orsay, France
[2] Ctr Etud Saclay, SPAM, DRECAM, F-91191 Gif Sur Yvette, France
[3] Univ Paris 11, LCP, F-91405 Orsay, France
[4] KEK, Photon Factory, Tsukuba, Ibaraki 305, Japan
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2001年 / 467卷
关键词：
synchrotron radiation; insertion device; polarization; VUV spectroscopy; monochromator; high resolution;
D O I：
10.1016/S0168-9002(01)00356-4
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The SU5 VUV beamline aims towards a dual scientific program: high resolution spectroscopy on dilute targets and linear/circular dichroism on anisotropic systems. A crossed planar/helicoidal electromagnetic undulator has been designed and built, providing both flux and variable polarizations. We have shown a complete versatility of the polarization state of the emitted light with high polarization rates. Besides, the harmonics of the undulator can be suppressed owing to a gas filter, acting as a low-energy pass filter, with rejection factors above 10(5). The beamline is centered around a 6.65m off-plane Eagle normal incidence monochromator which has shown unprecedented raw resolving powers. (117 000 at 21.6 eV, 133000 at 15.8 eV) with typical flux in a 1/50000 bandwidth of 10(10)-10(9)photons/s between 6 and 30 eV. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：453 / 457
页数：5
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