所属 神奈川大学 工学部 物理学教室
神奈川大学大学院 工学研究科 工学専攻（応用物理学領域）
|標題||Development of a High Dynamic Range Front-End Electronics for the Total Absorption Calorimeter of CALET|
|掲載誌名||PROCEEDINGS OF THE 31st ICRC, LODZ 2009|
|著者・共著者||Yusaku Katayose, Makio Shibata, Takayuki Asai, Masaki Go, Shoji Torii, Shunsuke Oazwa, Tadahisa Tamura, Kinya Hibino, Shoji Okuno, Hiroyuki Murakami,|
Yukio Uchihori, Hisashi Kitamura, Kenji Yoshidak and Shin Kubo
Read-out systems using Si photodiodes and front-end circuits(FEC) were studied in order
to measure the energy deposit with a dynamic range from 1MIP(minimum ionization particle) to 106 MIPs in a crystal scintillator bar of the total absorption calorimeter (TASC) of the CALET (CALorimetric Electron Telescope) instrument. Four types of FEC were investigated for the photodiode read out. Two of them were A225(AMP-TEK), which onsisted of a hybrid charge sensitive preamplifier and a shaping amplifier, and MPX-08 (NOVA), which is a charge-integrating chip. It was confirmed that the A225 had a resolution of approximately 0.31 fC and a maximum range of approximately 2 pC. A new hybrid integrated circuit(IC) is being developed to measure the light yield of a scintillator with a dynamic range of seven orders by using two photodiodes. This FEC consists of two preamplifiers that have a different gain. The performance of a high-gain preamplifier was evaluated. The resolution is approximately 0.5 fC and the maximum range is more than 25 pC. A new application specified integrated circuit(ASIC), which has a high dynamic range of four orders, is being developed. This ASIC consists of one preamplifier circuit and two shaping circuits that have a different gain. The prototype IC was designed using the 0.5-μm BiCMOS process. The outline of read-out systems using each type of FEC and the state of the development of each system are described.