量热器阵列探测器

A CALORIMETER WITH ARRAY DETECTORS

本工作研制出 5×25=125量热器阵列探测器。每个量热器单元是由石墨块与镍铬——镍铝热电偶构成。解决了热电偶丝与石墨块的粘接问题和上百条热电丝从真空室引出问题。创立了以液氮沸点温度为温度基点的新“0”点装置,它既具有温度稳定性能好又能解决各路之间的绝缘问题。为多路量热器mV级小讯号的物理测量奠定了基础。 采用Fy-1微机数据采集系统测量探测器的讯号。它性能稳定、采集速度快。测量了大面积二极管产生的电子束的均匀性,数据经过模拟处理,给出电子束空间分布的立体图像,从图可以清楚地看出电子束能量空间分布的非均匀性和轴向箍缩效应。

A 5×25=125 detector array has been designed for a calorimeter .Each element is consisted with a graphite block and a chromel ~alumel. Conglutination between the thermocouple wire and the graphite block and to extract the hundreds of the wires of the thermocouples from the vacuum cell. A new ' 0'-point set up was designed first of all using the critical temperature of the liquid nitrogen as the '0'-point of the temperature. A FY- 1 data acquisition system was used for the detector array. The energy distribution of the electron beam has been measured on large-area diode with the system.