Tests of Endcap capillary & Heat exchangers at CERN Richard Bates The University of Glasgow UK-V Meeting –16th October 2003

Overview Required work The test rig Time scales 16th Oct. 2003 Richard Bates

Required Work Require final design of heat exchangers and capillaries for SCT Endcap cooling circuit Capillaries inside heat exchangers so both tested at once Three different capillary lengths to be tested Measure cooling liquid mass flow as a function of liquid pressure Confirm design able to cool system with design mass flow (3g/s) Confirm ability of design to cope with rapid change in thermal load (0 to 100% module power) 16th Oct. 2003 Richard Bates

Test Rig C3F8 SCT cooling rig Spent last two weeks gaining experience with pixel sector 16th Oct. 2003 Richard Bates

Cooling circuit 16th Oct. 2003 Richard Bates

DCS control 16th Oct. 2003 Richard Bates

Time Scales Prototype Endcap capillaries installed @CERN: 20-23/10 Capillary tests : 24/10 – 6/11 Final tests of cooling loop filter: 7/11 – 11/11 New prototype constructed: 7/11 – 11/11 Test new prototype: 12/11 – 10/12 Final report: 11/12 – 18/12 Final design at RAL and external manufacture All going well Endcap heat exchangers delivered: 4/3 16th Oct. 2003 Richard Bates