Monte-Carlo simulation of noise in hard X-ray Transmission Crystal Spectrometers: Identification of contributors to the background noise and shielding optimization
Journal Article
·
· Review of Scientific Instruments
- CEA, Centre de Saclay, IRFU, F-91191 Gif-sur-Yvette (France)
- CELIA, Université de Bordeaux-CNRS-CEA, F-33405 Talence (France)
- Laboratoire Kastler Brossel, ENS, CNRS, UPMC, 75005 Paris Cedex (France)
- LULI Ecole Polytechnique, CNRS, CEA, UPMC, 91128 Palaiseau (France)
- University of Milano, via Celoria 16, 20133 Milano (Italy)
Transmission crystal spectrometers (TCS) are used on many laser facilities to record hard X-ray spectra. During experiments, signal recorded on imaging plates is often degraded by a background noise. Monte-Carlo simulations made with the code GEANT4 show that this background noise is mainly generated by diffusion of MeV electrons and very hard X-rays. An experiment, carried out at LULI2000, confirmed that the use of magnets in front of the diagnostic, that bent the electron trajectories, reduces significantly this background. The new spectrometer SPECTIX (Spectromètre PETAL à Cristal en TransmIssion X), built for the LMJ/PETAL facility, will include this optimized shielding.
- OSTI ID:
- 22308598
- Journal Information:
- Review of Scientific Instruments, Vol. 85, Issue 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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