Recent progress and development of Cryogenics system towards refurbishment of SST-1 Tanna Vipul1, Tank Jignesh1, Panchal Rohit1, Patel Rakesh1, Mahesuriya Gaurang1, Sonara Dashrath1, Patel Jayant1, Gupta Naresh Chand1, Gupta Manoj Kumar1, Christian Dikens1, Srikanth GLN1, Bairagi Nitin1, Garg Atul1, Singh Manoj1, Patel Ketan1, Sharma Rajiv1, Nimavat Hiren1, Shah Pankil1, Panchal Pradip1, Pradhan Subrata1 1Institute for Plasma Research, Bhat, Gandhinagar, India Abstract Under the SST-1 mission mandate, several cryogenics sub-systems have been enhanced and updated for cool-down of SST-1. Upgradation and new developments followed by stringent test procedures have increased the reliability of operation. After preventive maintenance of the helium plant, the facility has been extensively used for the TF/PF coils campaign in excess of 25 cycles. The tests have been carried out with and without using cold circulator in supercritical helium mode. New developments include, 80 K thermal shields along with its booster system, in-house development of vapor cooled current leads rated at 10 kA and their current feeders system, enhanced capacity of Helium recovery system, pneumatic services and 12 kA/16 V DC Switch Mode Power Supply system. Other significant test programs include Octant cold test at 80 K, electrical isolators test for helium and nitrogen and testing of current leads. The above aspects will be briefly discussed in this paper. Top Keywords SST-1, Embossed shields, Booster pumps, Current leads, Supercritical Helium. Top |