Slide 1UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE UCSB 4-Hybrid Thermal Test System Status 28 July 2003 Sam Burke UCSB HEP Group

Slide 2UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE Progress Dry Air Bubbler arrived Ordered replacement low air flow sensor Work on 4Hybrid Test Procedure à Test Time estimated at 57 minutes

Slide 3UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE Cold Box System

Slide 4UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE Progress Cooling Rate Study à Chiller water temperature –Room Temp / Dew Point / 5 deg C Communications with CERN à LVDS-TTL Converter à Safety Switch feature in acdc.vi

Slide 5UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE Test Procedure 1. Install 4 hybrids 3 min 2. Close cover and purge4 min ARC Test 3. Seal box when RH<20%5 min 4. Reduce air flow to 0.2 L/m1 min 5. Start Cold Cycle 32 min 6. Stable Temperature5 min ARC Test 7. Start Heat Cycle4 min 8. Stable Temperature & RH3 min ARC Test TOTAL 57 min

Slide 6UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE Cold Box System Test Runs

Slide 7UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE Cooling Rates TEST 2: T=50 min à 3.0 L/m air, min, 14g/hr 11deg C Water TEST3: T=32 min à 0.2 L/m air, 16g/hr 11 deg C Water\ CERN Rate: T=20 min

Slide 8UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE Future Plans Seal up air leaks in Cold Box Continue write-up of Test Procedures Verify Air Flow sensor calibration à New FR1005 Air 0.40 L/min*volt +-3%

Slide 9UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE Future Plans Calibrate UCSB Hybrid Cold Box after sealing à CERN Box is (18+20)/25min on cooling à CERN Box is (20+18)/3min on heating Test 4 Hybrid ARC Stand System move into clean room