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Changes in CR-39 proton sensitivity due to prolonged exposure to high vacuums relevant to the National Ignition Facility and OMEGA.
- Source :
- Review of Scientific Instruments; Sep2011, Vol. 82 Issue 9, p095110, 8p
- Publication Year :
- 2011
-
Abstract
- When used at facilities like OMEGA and the NIF, CR-39 is exposed to high vacuum environments before and after irradiation by charged particles and neutrons. Using an electrostatic linear accelerator at MIT, studies have been conducted to investigate the effects of high vacuum exposure on the sensitivity of CR-39 to fusion protons in the ∼1-9 MeV energy range. High vacuum conditions, of order 10-5 Torr, experienced by CR-39 samples at these facilities were emulated. It is shown that vacuum exposure times longer than ∼16 h before proton irradiation result in a decrease in proton sensitivity, whereas no effect was observed for up to 67 h of vacuum exposure after proton irradiation. CR-39 sensitivity curves are presented for samples with prolonged exposure to high vacuum before and after proton irradiation. [ABSTRACT FROM AUTHOR]
- Subjects :
- PROTONS
SENSITIVITY analysis
VACUUM
IRRADIATION
PARTICLES
NEUTRONS
ELECTROSTATICS
Subjects
Details
- Language :
- English
- ISSN :
- 00346748
- Volume :
- 82
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Review of Scientific Instruments
- Publication Type :
- Academic Journal
- Accession number :
- 66185163
- Full Text :
- https://doi.org/10.1063/1.3635537