Development of the soft x-ray imager (SXI) for ASTRO-H
Development of the soft x-ray imager (SXI) for ASTRO-H
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开发用于 ASTRO-H 的软 X 射线成像仪 (SXI)
DOI：
10.1117/12.893400
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
K.Hayashida
中科院分区：
文献类型：
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作者：
佐川友佳子;金子博;K.Hayashida
软x射线成像仪（SXI）是ASTRO-H卫星上的CCD相机，计划于2014年发射。SXI相机包含4个CCD芯片，每个CCD芯片的成像面积为31mmx31mm，以马赛克方式排列，覆盖整个38‘x38’的视场区域。型号为HPK Pch-NeXT4的SXI CCD是一种p通道型背照全耗尽器件，厚度为200μm。我们已经开发了SXI相机机身的工程模型，其中包括冷却器和模拟电子设备。结合面包板数字电子学，我们成功地运行了整个SXI系统。该系统将ccd冷却至-120°C，并检测到来自55fe源的x射线。虽然系统仍在进行优化，但在5.9 keV处获得了典型的200 eV和最佳156 eV （FWHM）的能量分辨率。读出噪声为10e - 15e -，待改进的目标值为5e -。正在进行的功能测试和环境测试揭示了在2012年SXI飞行模型生产之前需要解决的一些问题。
Soft X-ray Imager (SXI) is a CCD camera onboard the ASTRO-H satellite which is scheduled to be launched in 2014. The SXI camera contains four CCD chips, each with an imaing aread of 31mmx31 mm, arrayed in mosaic, which cover the whole FOV area of 38'x38'. The SXI CCD of which model name is HPK Pch-NeXT4 is a P-channel type, back-illuminated, fully depleted device with a thickness of 200μm. We have developed an engineering model of the SXI camera body with coolers, and analog electronics for them. Combined with the bread board digital electronics, we succeeded in operation the whole the SXI system. The CCDs are cooled down to -120°C with this system, and X-rays from55Fe sources are detected. Although optimization of the system is in progress, the energy resolution of typical 200 eV and best 156 eV (FWHM) at 5.9 keV are obtained. The readout noise is 10 e-to 15 e-, and to be improved its goal value of 5 e-. On-going function tests and environment tests reveal some issues to be solved until the producntion of the SXI flight model in 2012.