Modeling of neutron induced backgrounds in x-ray framing cameras

被引：15

作者：

Hagmann, C. ^{[1
]}

Izumi, N. ^{[1
]}

Bell, P. ^{[1
]}

Bradley, D. ^{[1
]}

Conder, A. ^{[1
]}

Eckart, M. ^{[1
]}

Khater, H. ^{[1
]}

Koch, J. ^{[1
]}

Moody, J. ^{[1
]}

Stone, G. ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2010年 / 81卷 / 10期

关键词：

D O I：

10.1063/1.3460454

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Fast neutrons from inertial confinement fusion implosions pose a severe background to conventional multichannel plate (MCP)-based x-ray framing cameras for deuterium-tritium yields > 10(13). Nuclear reactions of neutrons in photosensitive elements (charge coupled device or film) cause some of the image noise. In addition, inelastic neutron collisions in the detector and nearby components create a large gamma pulse. The background from the resulting secondary charged particles is twofold: (1) production of light through the Cherenkov effect in optical components and by excitation of the MCP phosphor and (2) direct excitation of the photosensitive elements. We give theoretical estimates of the various contributions to the overall noise and present mitigation strategies for operating in high yield environments. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3460454]

引用

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