Multilayer optics for monochromatic high-resolution X-ray imaging diagnostic in a broad photon energy range from 2 keV to 22 keV

被引：10
|
作者：
Troussel, Ph. [1 ]
Dennetiere, D. [2 ]
Maroni, R. [1 ]
Hoghoj, P. [3 ]
Hedacq, S. [3 ]
Cibik, L. [4 ]
Krumrey, M. [4 ]
机构：
[1] CEA, DAM, DIF, F-91297 Arpajon, France
[2] Synchrotron Soleil, F-91190 St Aubin, France
[3] Xenocs SA, F-38360 Sassenage, France
[4] Phys Tech Bundesanstalt, D-10587 Berlin, Germany
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2014年 / 767卷
关键词：
Non-periodic multilayer mirror; X-ray; Laser plasma; Synchrotron radiation; X-ray imaging; LMJ; BESSY-II; SUPERMIRRORS; BEAMLINE; MIRRORS; DESIGN;
D O I：
10.1016/j.nima.2014.07.048
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The "Commissariat a Fenergie atomique et aux energies alternatives" (CEA) studies and designs advanced X-ray diagnostics to probe dense plasmas produced at the future Laser Megajoule (LMJ) Facility. Mainly for X-ray imaging with high spatial resolution, different types of multilayer mirrors were developed to provide broadband X-ray reflectance at grazing incidence. These coatings are deposited on two toroidal mirror substrates that are then mounted into a Wolter-type geometry (working at a grazing angle of 0.45 degrees) to realize an X-ray microscope. Non-periodic (depth graded) W/Si multilayer can be used in the broad photon energy range from 2 key to 22 key, A third flat mirror can be added for the spectral selection of the microscope. This mirror is coated with a Mo/Si multilayer for which the d-spacing varies in the longitudinal direction to satisfy the Bragg condition within the angular acceptance of the microscope and also to compensate the angular dispersion clue to the field of the microscope. We present a study of such a so-called Gael mirror which was optimized for photon energy of 10.35 key, The three mirrors were coated using magnetron sputtering technology by Xenocs SA. The reflectance in the entire photon energy range was determined in the laboratory of the Physikalisch-Technische Bundesanstalt (PTB) at the synchrotron radiation facility BESSY II in Berlin. (C) 2014 Elsevier B.V. All rights reserved.
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页码：1 / 4
页数：4
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