Speaker
Description
The High Pressure Neutron Diffractometer (HPND) is designed to explore new phases and physical properties of materials under high pressure at the China Spallation Neutron Source (CSNS). A large-area 3He tube array detector has been adopted as position sensitive neutron detector. The 3He tube array contains 116 detection unit, each unit consist of eight 3He tubes. A dedicated readout electronics system is developed to acquire the neutron hit events, calculate the position and flight time information of the scattered neutrons. For each 8-3He-tube detection unit, the readout electronics consists of two 8-channel front-end boards (FEB) and one 16-channel digital acquisition (DAQ) board. The FEB converts the charge signal into a voltage pulse signal and pre-process the analog signals; The DAQ board performs analog-to-digital conversion, event processing and data communication. Test results shows that the readout electronics system could work well, and the position resolution of the detection unit is better than 8mm.
