Slide 1UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE UCSB 4-Hybrid Thermal Test System Status 13 October 2003 Sam Burke Lance Simms UCSB HEP Group

Slide 2UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE Progress Pulser sync problem resolved à No LVDS Trigger pulse from ARC VME Controller board à Discovered ARC VME Controller board assembly error Complete 4 Hybrid-PA Test time of 42 min

Slide 3UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE Progress Complete testing of newly bonded Hybrid/PA’s à Hybrid Introduced intentional open wire-bonds in one Hybrid/PA which were detected during testing.

Slide 4UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE Pulser Troubleshooting Pulser had been triggering on noise. Needs to be synchronized with ARC Clock. à Twisted cable from ARC Controller card used à Eliminated noise in UCSB LVDS/CMOS Converter No LVDS signals from ARC Controller Card

Slide 5UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE 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

Slide 6UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE ARC Controller Problem ARC Controller Boards with functioning External Buss à Ser 29 à Ser 31 U32 and U33 Switched on these boards causing inoperative External Buss function. à Ser 56 à Ser 57 à Ser 59

Slide 7UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE Cold Box in Clean Room

Slide 8UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE

Slide 9UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE 3 Open H/PA wire bonds

Slide 10UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE Installing Hybrid/PA’s

Slide 11UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE UCSB Cold Box

Slide 12UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE Recent Test Sequence

Slide 13UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE 4Hybrid Temp Test Report

Slide 14UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE New ARC Ground Straps

Slide 15UCSB CMS Weekly Status MeetingCMS 4-Hybrid Test System Sam Burke EE Future Plans Install copper grounding bars at each hybrid test position to reduce noise levels à this method has been tested and verified Reduce mass of aluminum hybrid test position base plate à Reduce thermal mass of chamber to reduce test time