Use of GafChromic film to diagnose laser generated proton beams

Journal Article · Thu May 15 04:00:00 EDT 2008 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.2901603· OSTI ID:21123921

Hey, D S; Key, M H; Mackinnon, A J; MacPhee, A G; Patel, P K ^[1]; Freeman, R R; Van Woerkom, L D ^[2]; Castaneda, C M ^[3]

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1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
2. Ohio State University, Columbia, Ohio 43210 (United States)
3. University of California, Davis, Davis, California 95616 (United States)

A calibration of three types of GafChromic radiochromic film (HS, MD-55, and HD-810) was carried out on the Crocker Nuclear Laboratory's 76 in. cyclotron at UC Davis over doses ranging from 0.001 to 15 kGy. The film was digitized with a scanning microdensitometer with which it was scanned twice with two different filters to increase the film's effective dynamic range. We demonstrate how this calibrated film can be used to measure the spectrum and total energy of a laser generated proton beam. This technique was applied to an experiment on the 10 J, 100 fs Callisto laser at Lawrence Livermore National Laboratory. The resulting proton spectrum was compared to that obtained by simultaneous measurement of Ti nuclear activation; the two methods give the same proton beam slope temperature and agree in number of protons to within 27%.

• OSTI ID: 21123921
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 5 Vol. 79; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BIOLOGICAL EFFECTS
CALIBRATION
CYCLOTRONS
FILMS
FILTERS
LASERS
LAWRENCE LIVERMORE NATIONAL LABORATORY
PROTON BEAMS
PROTON SPECTRA
PROTONS
RADIATION DOSES