7–11 Jul 2014
Europe/Amsterdam timezone

Cool-down Experiences with the SST-1 Helium Cryo System Before and after Current Feeder System Modifications

9 Jul 2014, 14:15
1h 45m
Poster presentation (105min) C-01: Large scale refrigeration, liquefaction Wed-Af-Posters Session 2.1

Speaker

Mr Rakeshkumar Patel (Institute For Plasma Research)

Description

The SST-1 machine comprises of superconducting magnets system (SCMS) which includes TF and PF magnets. In order to charge the SCMS, we need superconducting current feeder system consisting of sc feeders and vapor cooled current leads (VCCLs). We have installed all (+/-) 10 pairs of vapor cooled current leads for the TF and PF systems. While conducting initial engineering validation of SST-1 machine, our prime objective was to produce circular plasma using only the TF system. During SST-1 campaign I to VI, We have to close the PF magnets cooling in order to get the cryo stable conditions for current charging of the TF magnet system. In that case, the cooling of the PF current leads is not essential. It has been also observed that after closing of the PF system cooling, there was a limited experimental window of TF operation. Therefore, in recent SST-1 campaign-VII, we removed the PF current leads (9 pairs) and kept only one (+/-) pair of the 10 kA rated VCCLs to realize the charging of the TF system for extended window of operation. We have observed better cryogenic stability in TF magnets after modifications in CFS. In this paper, we report the comparison of the cool down performance for SST-1 machine operation before and after modifications of the current feeder system.

Primary author

Mr Rakeshkumar Patel (Institute For Plasma Research)

Co-authors

Mr Atul Garg (Institute For Plasma Research) Mr Dasarath Sonara (Institute for plasma research) Mr Dikens Christian (Institute For Plasma Research) Mr Gaurang Mahesuriya (Institue For Plasma Research) Mr Hiren Nimavat (Institute For Plasma Research) Mr Jayant Patel (Institute for plasma research) Mr Jignesh Tank (Institute For Plasma Research) Mr Ketan Patel (Institute For Plasma Research) Mr Nitin Bairagi (Institute For Plasma Research) Mr Pankil Shah (Institute For Plasma Research) Mr Pradip Panchal (Institute For Plasma Research) Mr Rajiv Sharma (Institute For Plasma Research) Mr Rohikumar Panchal (INSTITUTE FOR PLASMA RESEARCH) Mr Srikanth G.L.N (Institute for Plasma research) Dr Subrata Pradhan (Institute for plasma research) Dr Vipul Tanna (Institute for plasma research)

Presentation materials