Performance of 1 Meter Straw Detector for High Rate Neutron Imaging

被引：22

作者：

Lacy, Jeffrey L. ^{[1
]}

Athanasiades, Athanasios ^{[1
]}

Shehad, Nader N. ^{[1
]}

Martin, Christopher S. ^{[1
]}

Sun, Liang ^{[1
]}

机构：

[1] Proport Technol Inc, Houston, TX 77054 USA

来源：

2006 IEEE NUCLEAR SCIENCE SYMPOSIUM CONFERENCE RECORD, VOL 1-6 | 2006年

关键词：

D O I：

10.1109/NSSMIC.2006.356101

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Instrument requirements at the newly commissioned Spallation Neutron Source call for large area detectors that can sustain rates up to 10(7) neutrons/s and millimeter-level spatial resolution. Although He-3 pressurized area detectors can provide good spatial resolution, sensitivity and gamma ray discrimination, this technology cannot support the required rates without further development. We propose a detector technology based on thin-walled straws, lined with enriched boron carbide ((B4C)-B-10). A panel detector consisting of several thousand close-packed individual straws, which are read out independently, can easily support high event rates. We present test results for a sub-scale 100x4 cm(2) prototype detector, consisting of three 50-straw array modules. Each straw in the array has a diameter of 4 mm and a length of 1 m. Tests conducted in a thermal neutron beam focused on the count rate capability of the detector and the effect of high neutron rates and a high gamma ray flux on spatial resolution. Results showed that the detector can maintain a 7x4 mm(2) resolution up to an integral rate of 40,000 cps, and a gamma ray flux of 1000 mrem/hr.

引用

页码：20 / 26

页数：7