15 July 2010 Hyper Suprime-Cam: development of the CCD readout electronics
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Abstract
Hyper Suprime-Cam (HSC) employs 116 of 2k×4k CCDs with 464 signal outputs in total. The image size exceeds 2 GBytes, and the data can be readout every 10 seconds which results in the data rate of 210 Mbytes / sec. The data is digitized to 16-bit. The readout noise of the electronics at the readout time of 20 seconds is ~0.9 ADU, and the one with CCD is ~1.5 ADU which corresponds to ~4.5 e. The linearity error fits within ± 0.5 % up to 150,000 e. The CCD readout electronics for HSC was newly developed based on the electronics for Suprime-Cam. The frontend electronics (FEE) is placed in the vacuum dewar, and the backend electronics (BEE) is mounted on the outside of the dewar on the prime focus unit. The FEE boards were designed to minimize the outgas and to maximize the heat transfer efficiency to keep the vacuum of the dewar. The BEE boards were designed to be simple and small as long as to achieve the readout time within 10 seconds. The production of the system has been finished, and the full set of the boards are being tested with several CCDs installed in the HSC dewar. We will show the system design, performance, and the current status of the development.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hidehiko Nakaya, Tomohisa Uchida, Hironao Miyatake, Hiroki Fujimori, Sogo Mineo, Hiroaki Aihara, Hisanori Furusawa, Yukiko Kamata, Hiroshi Karoji, Satoshi Kawanomoto, Yutaka Komiyama, Satoshi Miyazaki, Tomoki Morokuma, Yoshiyuki Obuchi, Yuki Okura, Manobu Tanaka, Yoko Tanaka, Fumihiro Uraguchi, Yosuke Utsumi, "Hyper Suprime-Cam: development of the CCD readout electronics", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77352P (15 July 2010); doi: 10.1117/12.856853; https://doi.org/10.1117/12.856853
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