Development and calibration of the tracking Compton/Pair telescope MEGA
Development and calibration of the tracking Compton/Pair telescope MEGA
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DOI：
10.1016/j.nima.2005.01.071
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发表时间：
2005-04
影响因子：
1.4
通讯作者：
G. Kanbach;R. Andritschke;A. Zoglauer;M. Ajello;M. McConnell;J. Macri;J. Ryan;P. Bloser;S. Hunter;G. Dicocco;J. Kurfess;V. Reglero
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文献类型：
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作者：
G. Kanbach;R. Andritschke;A. Zoglauer;M. Ajello;M. McConnell;J. Macri;J. Ryan;P. Bloser;S. Hunter;G. Dicocco;J. Kurfess;V. Reglero
本文介绍了0.4- 50 MeV中能γ射线天文望远镜样机的研制和试验情况。作为COMPTEL和EGRET（低能量）的后继者，MEGA旨在将天文源的灵敏度提高至少一个数量级。因此，它可以填补计划或操作的硬X射线和高能伽马射线任务之间的严重灵敏度差距，并为未来的高级康普顿望远镜开辟道路。MEGA通过在一堆双面硅带轨道探测器中完全跟踪康普顿和对的产生事件来记录和成像γ射线，这些探测器被像素化的CsI量热计包围。一个按比例缩小的原型已经建成，我们描述其设计和性能的技术细节。给出了用放射源校准和用加速器产生的全极化γ射线束测量的结果，并展望了MEGA的未来计划。
We describe the development and tests of the prototype for a new telescope for Medium Energy Gamma-ray Astronomy (MEGA) in the energy band 0.4–50MeV. As a successor to COMPTEL and EGRET (at low energies), MEGA aims to improve the sensitivity for astronomical sources by at least an order of magnitude. It could thus fill the severe sensitivity gap between scheduled or operating hard-X-ray and high-energy gamma-ray missions and open the way for a future Advanced Compton Telescope. MEGA records and images γ-rays by completely tracking Compton and Pair creation events in a stack of double-sided Si-strip track detectors surrounded by a pixelated CsI calorimeter. A scaled down prototype has been built and we describe technical details of its design and properties. Results from calibrations using radioactive sources and from measurements with an accelerator generated, fully polarized, γ-ray beam are presented and an outlook to future plans with MEGA is given.