29th Symposium on Fusion Technology (SOFT 2016)

P3.068 Data acquisition system for LN2 cool down experiment for 6 nos. of cryogenics pumps

7 Sep 2016, 11:00

1h 20m

Foyer 2A (2nd floor), 3A (3rd floor) (Prague Congress Centre)

Board: 68

Poster D. Diagnostics, Data Acquisition and Remote Participation P3 Poster session

Speaker

Karishma Qureshi (Institute for Plasma Research)

Description

Cryogenic Instrumentation is a unique and vast field and requires an in-depth understanding of the process and instrumentation. 26 channels Data Acquisition System is required for the 6 nos. of Cryogenics Pumps LN2 cool down experiment. The data acquisition system measures 22 nos. of temperature signals, 2 nos. of level signals of the buffers and 2 nos. of Nitrogen Dewar Signals (Pressure and Level signals). The data for all the 26 channels is required to be monitored and acquired in the data acquisition system. This data will be helpful in analysis and understanding of the 6 pumps configuration along with many other issues. The channels sampling rate is kept 1Hz (1 sample/sec/channel). Slow acquisition is done for all the 26 channels. On the first day, the filing of Dewar was kept in series with the cool down of all the 6 pumps. So the cool down for the pumps took more time in comparison with the second day experiment. On second day the configuration was changed and cool down experiment was done which Dewar already filled upto 60%. The temperature signals and pressure and level signals (LN2 Dewar) acquired from the data acquisition system were needed in understanding the cool down rates for the pumps, to know the Dewar capability for 6 pumps and many other issues. The instrumentation, powering, data logger and the software for the 26 measurement channels will be discussed in details.