Unbiased Channels, CFT Axial, 1-Dec-03

1
Unbiased Channels, CFT Axial, 1-Dec-03

• Location No of unbiased Layer Fibers
  Phi Board
• VLPCs
• 6B6 SVX7 8 cftx2
  2560-2620 4.5 456
• 7A2 SVX6 7 cftx6
  4760 476
• 7A3 SVX5 6 cftx6
  5350
• 4B1 SVX0 8 cftx7
  2240-2305 1.6
• 9A3 SVX7 8 cftx7
  2625-2689 1.95
• 9A5 SVX7 7 cftx8
  
• Looked at above boards with archiver damage
  appeared after 0ctober 13 power outage.
• 7A2 SVX4 1 (1) cftx6
  5040
• 7A3 SVX4 1 (1) cftx6
  5240
• 7A2 SVX1 2 cftx6
  5400
• 7A0 SVX7 3 (1,2,8) cftx6
  5650
• 6A2 SVX7 1 (1) cftx7
  920
• 4B0 SVX1 3 (2,3,6) cftx7
  1450
• 4B6 SVX7 2 cftx8
  2350
• 5A6 SVX4 3
• Total 480 VLPC pixels

2
6B6 current versus time
3
7A2 current versus time
4
3A7 current versus time
5
Other problems in CFT axialSome SVXs need odd
thresholds

• 8A3 SVX1 board 609 does not rspond to vref
• 8A5 SVX0 board 461 readout errors
• 6B7 SVX0 board 451 readout errors
• 6A6 SVX0 board 518 readout errors
• 3A1 SVX0 board 489 needs odd SVX threshold
• 6B1 SVX0 board 581 needs odd SVX threshold

6
Unbiased Channels, CFT Stereo CPS 1-Dec-03

• Location No of unbiased Layer Fibers
  Phi
• VLPCs
• 1B0 SVX4 8
• 1B1 SVX0 8
• 2A0 SVX7 8
• 2A5 SVX2 5
• 2B4 SVX0 4
• 3A0 SVX7 5
• 3A4 SVX7 8
• 3A7 SVX3 6 cps
  cps
• 3A7 SVX7 8 cftu1
  641-704
• 3B0 SVX0 5
• 3B1 SVX7 4
• 3B3 SVX3 7
  cps
• 3B4 SVX2 7
• 3B6 SVX3 7
• Looked at above boards with archiver damage
  appeared after 0ctober 13 power outage.
• 1B0 SVX7 3

7
Dead cft channels

• 6-May-03
  15-August-03
• Layer Total Dead Dead VLPC Total Dead
  Dead VLPC
• cftx1 3 0 2560 5
• cftx2 17 8 3200 17 8
• cftx3 23 8 3840 15 0
• cftx4 6 0 4480 6
• cftx5 16 0 5120 16
• cftx6 29 16 5760 21 8
• cftx7 22 8 6400 36 16
• cftx8 24 8 7040 33 16
• cftu1 13 0 2560 13
• cftu2 13 0 3840 14
• cftu3 33 16 5120 33 16
• cftu4 19 0 6400 21
• cftv1 2 0 3200 1
• cftv2 9 0 4480 13
• cftv3 27 0 5760 36 8
• cftv4 19 0 7040 31
• Total 275 64 76800 311 72 (9 chips)