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UCSB 4-Hybrid Thermal Test System Status. 13 October 2003 Sam Burke Lance Simms UCSB HEP Group. 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. - PowerPoint PPT Presentation
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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