RAKESH KUMAR, A J MALYADRI, S MURALITHAR, RUBY SHANTI, S K SAINI, KUSUM RANI, B P AJITH KUMAR, RAJESH KUMAR and R K BHOWMIK

Nuclear Science Centre, Aruna Asaf Ali Marg, Post Box No 10502, New Delhi 110 067, India

Abstract.

An indigenously developed automatic liquid nitrogen (LN2) filling system has been installed in gamma detector array (GDA) facility at Nuclear Science Centre. Electro-pneumatic valves are used for filling the liquid nitrogen into the high purity germanium detector cryostat. The temperature of the out-flowing gas/liquid from the cryostat is monitored using platinum resistor thermometer. The program allows for automatic filling at regular intervals with temperature monitoring from a remote terminal.

Keywords:  Automation; liquid nitrogen; high purity germanium; electro-pneumatic.

Pacs Nos.  29.90.+r