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