Development of medium and high energy electron instrument with active collimated shield

当我们知道高能粒子加速过程中的微小机制时，需要对从几十keV到几MeV的电子观测进行高分辨率的时间、俯仰角和能量测量。然而，日本的电子观测装置的能量在10千电子伏特到几兆电子伏特之间，精度还不够好。通过应用本研究中常用的伽玛射线等测量技术井式有源柯利仪，研制了高能粒子在高计数率辐射环境下也能正确运动的电子测量系统。为了提高中能量范围的能量测量精度，设计了双面硅条探测器（DSSD）及其专用读取电路。通过将井式CsI闪烁与DSSD相结合，我们能够在数度内确定高能电子的入射方向。在高辐射环境下，由于粒子的堆积，航天器上使用的仪器无法正确测量电子的能量或通量。我们成功地开发了由本研究开发的dssd和读取芯片组成的新型仪器，能够准确地测量高辐射环境下的电子能量和通量。

When we know the minute mechanism in the acceleration process of a high-energy particle the electron observation from a few ten keV to several MeV needs to be measured with high resolution about time, pitch angle and energy. However, the observation devices of the electron that had the energy of several 10 keV -several MeV, there is not the good thing of accuracy sufficiently in Japan.By applying the well style active collie meter that has been used as the measurement technology such as gamma ray in this research, we did the development of the electron measuring system that a high-energy particle acts correctly, even in the high-count rate radiation environment. Also, both a double-sided Si strip detector (DSSD) and an exclusive reading circuit of the DSSD were developed to improve energy measurement accuracy for the middle energy range. By combining the well style CsI scintillater and DSSD, we were able to decide the incidence direction of a high-energy electron within several degrees. The instrument that had been used in spacecraft was unable to measure energy or flux of electrons correctly under the high radiation environment because of pile-up of particles. We successes the development of the new instrument that were consisted of DSSDs and reading chips developed in this study had been able to measure both the energy and the flux of electrons exactly under the high radiation environment.