Proton radiation damage experiment on P-Channel CCD for an X-ray CCD camera onboard the ASTRO-H satellite

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• 作者：Koji Mori ; Yusuke Nishioka ; Satoshi Ohura ; Yoshiaki Koura ; Makoto Yamauchi ; Hiroshi Nakajima ; Shutaro Ueda ; Hiroaki Kan ; Naohisa Anabuki ; Ryo Nagino ; Kiyoshi Hayashida ; Hiroshi Tsunemi ; Takayoshi Kohmura ; Shoma Ikeda ; Hiroshi Murakami ; Masanobu Ozaki ; Tadayasu Dotani ; Yukie Maeda ; Kenshi Sagara
• 关键词：P-channel CCD ; Proton radiation damage ; Charge-injection
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：11 December, 2013
• 年：2013
• 卷：731
• 期：Complete
• 页码：160-165
• 全文大小：691 K

文摘

We report on a proton radiation damage experiment on P-channel CCD newly developed for an X-ray CCD camera onboard the ASTRO-H satellite. The device was exposed up to 10⁹ protons cm^鈭? at 6.7 MeV. The charge transfer inefficiency (CTI) was measured as a function of radiation dose. In comparison with the CTI currently measured in the CCD camera onboard the Suzaku satellite for 6 years, we confirmed that the new type of P-channel CCD is radiation tolerant enough for space use. We also confirmed that a charge-injection technique and lowering the operating temperature efficiently work to reduce the CTI for our device. A comparison with other P-channel CCD experiments is also discussed.