Baseline design of the filters for the LAD detector on board LOFT

被引：3

作者：

Barbera, M. ^{[1
,2
]}

Winter, B. ^{[3
]}

Coker, J. ^{[3
]}

Feroci, M. ^{[4
,5
]}

Kennedy, T. ^{[3
]}

Walton, D. ^{[3
]}

Zane, S. ^{[3
]}

机构：

[1] Univ Palermo, Dipartimento Fis & Chim, I-90123 Palermo, Italy

[2] Osserv Astron Palermo, Ist Nazl Astrofis, I-90134 Palermo, Italy

[3] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England

[4] Ist Astrofis & Planetol Spaziale Roma, Ist Nazl Astrofis, I-00133 Rome, Italy

[5] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy

来源：

SPACE TELESCOPES AND INSTRUMENTATION 2014: ULTRAVIOLET TO GAMMA RAY | 2014年 / 9144卷

关键词：

X-ray; mission; LOFT; LAD; silicon drift detector; optical blocking filters; OPTICAL-CONSTANTS; FILMS;

D O I：

10.1117/12.2057408

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Large Observatory for X-ray Timing (LOFT) was one of the M3 missions selected for the phase A study in the ESA's Cosmic Vision program. LOFT is designed to perform high-time-resolution X-ray observations of black holes and neutron stars. The main instrument on the LOFT payload is the Large Area Detector (LAD), a collimated experiment with a nominal effective area of similar to 10 m(2) @ 8 keV, and a spectral resolution of similar to 240 eV in the energy band 2-30 keV. These performances are achieved covering a large collecting area with more than 2000 large-area Silicon Drift Detectors (SDDs) each one coupled to a collimator based on lead-glass micro-channel plates. In order to reduce the thermal load onto the detectors, which are open to Sky, and to protect them from out of band radiation, optical-thermal filter will be mounted in front of the SDDs. Different options have been considered for the LAD filters for best compromise between high quantum efficiency and high mechanical robustness. We present the baseline design of the optical-thermal filters, show the nominal performances, and present preliminary test results performed during the phase A study.

引用

页数：11

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