Author/Authors :
Mori، نويسنده , , Koji and Nishioka، نويسنده , , Yusuke and Ohura، نويسنده , , Satoshi and Koura، نويسنده , , Yoshiaki and Yamauchi، نويسنده , , Makoto and Nakajima، نويسنده , , Hiroshi and Ueda، نويسنده , , Shutaro and Kan، نويسنده , , Hiroaki and Anabuki، نويسنده , , Naohisa and Nagino، نويسنده , , Ryo and Hayashida، نويسنده , , Kiyoshi and Tsunemi، نويسنده , , Hiroshi and Kohmura، نويسنده , , Takayoshi and Ikeda، نويسنده , , Shoma and Murakami، نويسنده , , Hiroshi and Ozaki، نويسنده , , Masanobu and Dotani، نويسنده , , Tadayasu and Maeda، نويسنده , , Yukie and Sagara، نويسنده , , Kenshi، نويسنده ,
Abstract :
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−2 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.
