NDLI: Step-wedge spectrometer for pulsed X-ray sources

Content Provider	IEEE Xplore Digital Library
Author	Goldin, F.J. Aufderheide, M.
Copyright Year	2004
Description	Author affiliation: Bechtel Nevada, Livermore, CA, USA (Goldin, F.J.)
Abstract	Summary form only given. High-current (/spl sim/10 kA), pulsed (/spl sim/25 ns), bremsstrahlung X-ray sources in the 100 keV to 2 MeV regime are commonly used to radiograph hydrodynamic physics experiments. Knowledge of the spectrum is useful both in improving source performance and image analysis. Consequently, we are developing a spectrometer for such sources. X-rays are detected in 25 channels, each comprising an X-ray filter, an LYSO scintillator and lead (side) shielding. A Monte Carlo calculation gives the spectral responses of the channels, which then allows unfolding the X-ray spectrum from the relative light outputs. Greatly complicating the application of such a scheme is the sensitive dependence of the unfolding to errors in both the data and in the frequency-response calculations. This is mitigated by tailoring the channel responses to be as far from linear dependence as possible. As in an earlier version of this system, filter thickness and material is varied to maximize the distinction of the low-end acceptance of the channels, with thicker, higher-Z filters giving a higher low-end "cutoff" similar that done by Carlson and Gorbics. The earlier spectrometer employed the same scintillator (sheet of LANEX Fast B) for all channels, but varying the thicknesses of the LYSO scintillators now adds some control of the high-end cut-off, along lines similar to Priedhorsky. Optimizing filter/scintillator thickness combinations to separate the spectral responses of the various channels are shown. Experimental data with a 1.5 MeV endpoint energy pulsed bremstrahlung source and the backing out an X-ray spectrum is also presented.
Sponsorship	Plasma Sci. and Applications Committee of the IEEE Nuclear and Plasma Sci. Soc
File Size	72751
File Format	PDF
ISBN	0780383346
ISSN	07309244
DOI	10.1109/PLASMA.2004.1340007
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-07-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Spectroscopy X-ray imaging Filters Radiography Hydrodynamics Physics Image analysis X-ray detection X-ray detectors Monte Carlo methods
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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