Research and Development of Imaging Calorimeter for Space Experiment Using CERN-SPS

我们研制了一种能在气球和空间站上携带的宇宙射线观测成像量热计。这一发展是与意大利和法国的研究人员合作进行的，用于使用欧洲核子研究中心- sps光束。作为用于量热计的多阳极PMT读出系统，我们尝试开发一个模拟ASIC和一个带有16位ADC和FPGA的前端电路（FEC）。该系统每年使用CERN-SPS的不同能量的电子和质子束进行三次测试。1.2002采用传统的ASC和FEC技术制作了64个阳极pmt的读出系统。该系统由6个pmt组成，用于读取来自闪烁光纤的512ch信号。通过在CERN的束流测试，我们发现FEC中的噪声太大，无法实现动态范围，读出速度也不快。2.2003我们通过改进FEC的设计，开发了低噪声ASIC和高速FEC。采用FPGA实现了灵活的触发逻辑系统。开发了VME系统的接口板，实现了高速率的数据采集。最后，研制成功了高速大动态范围成像量热仪系统。欧洲核子研究中心对其性能进行了研究。通过在CERN-SPS中使用最高能量束的测试，证明了探测器中改进的系统具有空间应用所需的性能。

We have developed an imaging calorimeter for cosmic-ray observation, which is able to be borne on balloon and space station. The development was carried out in collaboration with researchers in Italy and France for using the CERN-SPS beams. As a read out system of multi-anode PMT used in the calorimeter, we tried to develop an analog ASIC and a front-end circuit(FEC) with 16bit ADC and FPGA. The system was tested three times in each year by using CERN-SPS beams with various energies of electrons and protons. The research results in each test are summarize in the following.1.2002 We made a read-out system using conventional ASC and FEC for 64 anode-PMT. The system is composed of 6 PMTs to read the 512ch signals from scintillating fibers. By the beam tests at CERN, we found that the noise in FEC is to large to achieve the dynamic range and the read-out speed is not fast.2.2003 We developed a low noise ASIC and a high speed FEC by improving the design of FEC. FPGA is adopted to realize a flexible system for trigger logic. The interface board of VME system was also developed to achieve the high rate data taking. Finally, we have succeeded in the high speed and large dynamic range system for imaging calorimeter. The performance was studied by the CERN.-SPS beams.3.2004 The system modified in the detector was proved to have a required performance for space application by tests using the highest energy beams in CERN-SPS.