Proton recoil detector of fusion neutrons using natural diamond
| Autor: | R. J. Maqueda, S. S. Han, R. S. Wagner, P. A. Staples, Cris W. Barnes |
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| Rok vydání: | 1997 |
| Předmět: | |
| Zdroj: | Review of Scientific Instruments. 68:624-627 |
| ISSN: | 1089-7623 0034-6748 |
| DOI: | 10.1063/1.1147668 |
| Popis: | Diamond, with its high radiation damage resistance, is an attractive alternative to silicon for neutron measurements in next step fusion experiments. A 200-μm-thick type IIa natural diamond with Ti/Au contacts was tested at the LAMPF-WNR facility by time-of-flight neutron energy identification. The crystal, having a carrier lifetime of up to 1 ns, was arranged in a low-energy-resolution, high-sensitivity proton recoil telescope consisting of a polyethylene radiator and a low-energy-proton Teflon filter. This arrangement is similar to the triton burnup monitor of Croft et al. [Rev. Sci. Instrum. 64, 1418 (1993)], where a silicon photodiode was used as a recoil proton detector. The observed sensitivity for 14 MeV neutrons (DT) is (1.25±0.15)×10−3 counts/neutron. However, a high contribution of neutron-induced events in the diamond, mainly carbon (A=12) recoils, was observed. A one-dimensional calculation for the detector response to carbon recoil and proton deposition is compared to the measurements. Poor e... |
| Databáze: | OpenAIRE |
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