ucsb 4-hybrid thermal test system status
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UCSB CMS Weekly Status Meeting CMS 4-Hybrid Test System Sam Burke EE Slide 1
UCSB 4-Hybrid Thermal Test System Status
13 October 2003
Sam Burke
Lance Simms
UCSB HEP Group
UCSB CMS Weekly Status Meeting CMS 4-Hybrid Test System Sam Burke EE Slide 2
Progress
• Pulser sync problem resolved No LVDS Trigger pulse from ARC VME Controller
board Discovered ARC VME Controller board assembly error
• Complete 4 Hybrid-PA Test time of 42 min
UCSB CMS Weekly Status Meeting CMS 4-Hybrid Test System Sam Burke EE Slide 3
Progress
• Complete testing of newly bonded Hybrid/PA’s Hybrid 30216711500708
• Introduced intentional open wire-bonds in one Hybrid/PA which were detected during testing.
UCSB CMS Weekly Status Meeting CMS 4-Hybrid Test System Sam Burke EE Slide 4
Pulser Troubleshooting
• Pulser had been triggering on noise. Needs to be synchronized with ARC Clock . Twisted cable from ARC
Controller card used Eliminated noise in UCSB
LVDS/CMOS Converter
• No LVDS signals from ARC Controller Card
UCSB CMS Weekly Status Meeting CMS 4-Hybrid Test System Sam Burke EE Slide 5
ARC Controller Problem
• LVDS Driver and LVDS Receiver U32 and U33 were switched during board assembly. Problem was never discovered.
• External Buss connector and associated IC’s on lower left of photo.
U32
UCSB CMS Weekly Status Meeting CMS 4-Hybrid Test System Sam Burke EE Slide 6
ARC Controller Problem
• ARC Controller Boards with functioning External Buss Ser 29 Ser 31
• U32 and U33 Switched on these boards causing inoperative External Buss function. Ser 56 Ser 57 Ser 59
UCSB CMS Weekly Status Meeting CMS 4-Hybrid Test System Sam Burke EE Slide 7
Cold Box in Clean Room
UCSB CMS Weekly Status Meeting CMS 4-Hybrid Test System Sam Burke EE Slide 8
UCSB CMS Weekly Status Meeting CMS 4-Hybrid Test System Sam Burke EE Slide 9
3 Open H/PA wire bonds
UCSB CMS Weekly Status Meeting CMS 4-Hybrid Test System Sam Burke EE Slide 10
Installing Hybrid/PA’s
UCSB CMS Weekly Status Meeting CMS 4-Hybrid Test System Sam Burke EE Slide 11
UCSB Cold Box
UCSB CMS Weekly Status Meeting CMS 4-Hybrid Test System Sam Burke EE Slide 12
Recent Test Sequence
UCSB CMS Weekly Status Meeting CMS 4-Hybrid Test System Sam Burke EE Slide 13
4Hybrid Temp Test Report
UCSB CMS Weekly Status Meeting CMS 4-Hybrid Test System Sam Burke EE Slide 14
New ARC Ground Straps
UCSB CMS Weekly Status Meeting CMS 4-Hybrid Test System Sam Burke EE Slide 15
Future Plans
• Install copper grounding bars at each hybrid test position to reduce noise levels this method has been tested and verified
• Reduce mass of aluminum hybrid test position base plate Reduce thermal mass of chamber to reduce test time
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