The CAST time projection chamber

被引：28

作者：

Autiero, D.

Beltran, B.

Carmona, J. M.

Cebrian, S.

Chesi, E.

Davenport, M.

Delattre, M.

Di Lella, L.

Formenti, F.

Irastorza, I. G.

Gomez, H.

Hasinoff, M.

Lakic, B.

Luzon, G.

Morales, J.

Musa, L.

Ortiz, A.

Placci, A.

Rodrigurez, A.

Ruz, J. ^{[1
]}

Villar, J. A.

Zioutas, K.

机构：

[1] Univ Zaragoza, Lab Fis Nucl & Altas Energias, Zaragoza, Spain

[2] CERN, European Org Nucl Res, CH-1211 Geneva 23, Switzerland

[3] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada

[4] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V5Z 1M9, Canada

[5] Rudjer Boskovic Inst, Zagreb, Croatia

[6] Univ Patras, Patras, Greece

来源：

NEW JOURNAL OF PHYSICS | 2007年 / 9卷

关键词：

D O I：

10.1088/1367-2630/9/6/171

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

One of the three x- ray detectors of the CERN Axion Solar Telescope ( CAST) experiment searching for solar axions is a time projection chamber ( TPC) with a multi-wire proportional counter ( MWPC) as a readout structure. Its design has been optimized to provide high sensitivity to the detection of the low intensity x- ray signal expected in the CAST experiment. A low hardware threshold of 0.8 keV is set to a safe level during normal data taking periods, and the overall efficiency for the detection of photons coming from conversion of solar axions is 62%. Shielding has been installed around the detector, lowering the background level to 4.10 x 10(-5) counts cm(-2) s(-1) keV- between 1 and 10 keV. During phase I of the CAST experiment the TPC has provided robust and stable operation, thus contributing with a competitive result to the overall CAST limit on axion- photon coupling and mass.

引用

页数：16

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