The FOCAL spectrometer for accurate X-ray spectroscopy of fast heavy ions

S. Chatterjee , Heinrich F. Beyer (1) , D. Liesen (1) , Thomas Stöhlker (1) , Alexander Gumberidze (1) , Christophor Kozhuharov (1) , D. Banas (2) , D. Protic , K. Beckert , P. Beller , Th. Krings , F. Bosch (1) , B. Franzke , S. Hagmann (1) , J. Hoszowska (3) , P. Indelicate , H.-J. Kluge (1) , X. Ma (4) , B. Manil (5) , I. Mohos , F. Nolden , U. Popp , Alexandre Simionovici (6) , D. Sierpowski , M. Steck , U. Spillmann , C. Brandau , E. Forster , Z. Stachura , S. Tashenov (1) , Martino Trassinelli (7) , A. Warczak , O. Wehrhan , E. Ziegler , Sergiy Trotsenko (1) , Regina Reuschl (1)

1 GSI - Helmholtz zentrum für Schwerionenforschung GmbH
2 ESE - Ecologie Systématique et Evolution
3 SIMaP - Science et Ingénierie des Matériaux et Procédés
4 CCCma - Canadian Centre for Climate Modelling and Analysis
5 CIMAP - UMR 6252 - Centre de recherche sur les Ions, les MAtériaux et la Photonique
6 LST - Laboratoire de Sciences de la Terre
7 LKB (Jussieu) - Laboratoire Kastler Brossel

A system of two crystal spectrometers for accurate wavelength measurements of hard X-rays emitted by heavy ions in flight is presently being completed. The configuration is working in the focusing compensated asymmetric laue (FOCAL) mode along with high performance two-dimensional position sensitive micro-strip Ge detectors. Recent tests of the spectrometer have been performed securing quantitatively spectral resolving power and efficiency predicted by numerical simulations. For the proposed application, nearly perfect Silicon single crystals need to be bent cylindrically using a precision crystal-bending device, close to the limit where they start to break.

Keywords: X-ray crystal optics; Fast beam spectroscopy; Position sensitive detector; Lamb-shift

Domains: Continental interfaces, environment; Global Changes

S. Chatterjee, Heinrich F. Beyer, D. Liesen, Thomas Stöhlker, Alexander Gumberidze, et al.. The FOCAL spectrometer for accurate X-ray spectroscopy of fast heavy ions. Nuclear Instruments and Methods in Physics Research, 2006, 245 (1), pp.67 à 71. ⟨insu-00403041⟩