Japanese Activity on CCD developments Hiroshi Tsunemi Osaka

Japanese Activity on CCD developments Hiroshi Tsunemi, Osaka university International Workshop High Energy Astrophysics in the Next Decade --- Ne. XT and Future Missions --14: 40— 15: 00 June 23, 2006 International House, Tokyo Metropolitan University, Tokyo, Japan

Major member in Japan Osaka university H. Tsunemi, K. Hayashida, E. Miyata, K. Torii, H. Ozawa, N. Anabuki, D. Matsuura, M. Nomachi Kyoto university K. Koyama, T. Tsuru, H. Matsumoto, T. Inui, M. Ozawa JAXA/ISAS T. Dotani, M. Ozaki, H. Murakami, H. Ikeda Hamamatsu photonics corp. K. Yamamoto, K. Miyaguchi, M. Muramatsu, H. Suzuki, H. Kouno, S. Takagi National Astronomical Observatory of Japan (Subaru) S. Miyazaki, Y. Kamata

Topics Development of our X-ray CCDs n MAXI-SSC for all sky survey, Hayabusa for small asteroid study Pursue a large format : CREST-CCD, Ne. XT 1, Ne. XT 2 Ne. XT 1, Thick depletion layer : Pch CCD instead of conventional Nch n Development of P-channel CCDs for Ne. XT (Ozawa, Poster 8) Thin absorption feature : BI CCD then Ne. XT_SXI n n Development of fully depleted and BI CCD for Ne. XT (Takagi, Poster 9) (Takagi, 9) Soft X-ray Imager, SXI, for the Ne. XT mission (Ne. XT team, Poster 5) (Ne. XT 5) High efficiency at high energy: SDCCD quite a novel concept n Hi resolution wide band photon-counting SDCCD (Miyata, Poster 10) (Miyata, 10) Balloon experiment, Sumit, and 2 k x 4 k CCD, Working temperature of the CCD : CCD degradation Low power and high speed : ASIC M 01 MD 01

Summary Position resolution : biggest advantage of the CCD n We can have a sub-pixel resolution Effective area : one inch square chip is well established n Large format reduces yield Buttable device Wide energy range : SDCCD (BI) can cover 0. 1~100 ke. V n n n Low energy BI chips covers down to 0. 1 ke. V High energy Thick depletion layer (Pch) SD CCD (up to 100 ke. V) Time resolution : biggest disadvantage of the CCD n n Multiple readout nodes ASIC (100 times faster? ) High time resolution can avoid pileup and may eliminate the OBF Radiation damage : we need a beam test n Novel cooling system is required for Ne. XT (-90 C is not enough)

Topics Development of our X-ray CCDs n MAXI-SSC for all sky survey, Hayabusa for small asteroid study Pursue a large format : CREST-CCD, Ne. XT 1, Ne. XT 2 Ne. XT 1, Thick depletion layer : Pch CCD instead of conventional Nch n Development of P-channel CCDs for Ne. XT (Ozawa, Poster 8) Thin absorption feature : BI CCD then Ne. XT_SXI n n Development of fully depleted and BI CCD for Ne. XT (Takagi, Poster 9) (Takagi, 9) Soft X-ray Imager, SXI, for the Ne. XT mission (Ne. XT team, Poster 5) (Ne. XT 5) High efficiency at high energy: SDCCD quite a novel concept n Hi resolution wide band photon-counting SDCCD (Miyata, Poster 10) (Miyata, 10) Balloon experiment, Sumit, and 2 k x 4 k CCD, Working temperature of the CCD : CCD degradation Low power and high speed : ASIC M 01 MD 01