Dead Channels, CFT Axial, 1Dec03

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

• Location No of unbiased Layer Fibers
  Phi
• VLPCs
• 6B6 SVX7 8
  cftx2 2561-2624 4.40-4.52 6 live
  chls
• 7A2 SVX6 7
  cftx6 4737-4800 4.54-4.61
• 7A3 SVX5 5(4-8 8 pixels) cftx6
  5313-5376 5.16-5.23
• 4B1 SVX0 8
  cftx7 2241-2304 1.57-1.63
• 9A3 SVX7 8
  cftx7 2625-2688 1.95-2.01
• 9A5 SVX7 4(1,3,6,817 pixels) cftx8
  3905-3968 2.86-2.91
• Looked at above boards with archiver damage
  appeared after 0ctober 13 power outage.
• 5A6 SVX4 2(6,7) cftx1,
  385-448 0.32--.47
• 6A0 SVX7 1(1)
  cftx3, 1-64
• 6A1 SVX0 1(1)
  cftx3, 65-128
• 5B3 SVX3 1(6)
  cftx4, 577-640
• 5A3 SVX5 1(8)
  cftx4, 1217-1280
• 5B6 SVX6 4(1,2,7,8) cftx5,
  129-192 in hit map, not in bias study 5.81-5.89
• 8B6 SVX7 1(17 pixels) cftx5,
  2049-2112
• 7A2 SVX4 1 (1)
  cftx6, 4993-5056
• 7A3 SVX4 1 (1)
  cftx6, 5185-5248

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

• 
  Layer Fibers
  phi
• 6B7 SVX0 board 451 readout errors
  cftx2 2625-2688 4.52-4.65
• 8A3 SVX1 board 609 does not rspond to vref
  cftx3 2497-2560 3.45-3.56
• 7A3 SVX0 readout errors
  cftx6 4673-4737 4.47-4.54 new
• 8A5 SVX0 board 461 readout errors
  cftx7 4801-4864 4.08-4.14
• 6A6 SVX0 board 518 readout errors
  cftx7 5121-5184 4.40-4.46
• BB1 resets itself
• 3A1 SVX0 board 489 needs odd SVX threshold
• 6B1 SVX0 board 581 needs odd SVX threshold

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Dead Channels and Readout Problems

• DEAD CHANNELS
  READOUT PROBLEMS
• 6A2 4B0 4B1 9A3
  8A5 6A6
• SVX7 SVX1 SVX0 SVX7
  SVX0 SVX0

7
Testing Readout Problems

• Vref increased by 15 so now pedestals above
  threshold.
• Global threshold set to 0x56, triggering on led
  crossing

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Testing Readout Problems

• Triggering on all crossings

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Testing Readout Problems
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Dead Channels, CFT Stereo 1-Dec-03

• Location No of unbiased
  Layer,Fibers Phi Alive pixels
• VLPCs
• 3A7 SVX7 8
  cftu1, 641-704 3
• 3B2 SVX6 4(1,2,3,85 pixels)
  cftu2, 1217-1280
• 2A5 SVX2 4(1,5,6,713 pixels)
  cftu3, 513-576
• 2A0 SVX7 8
  cftu4, 1217-1280 6 in
  VLPC 5
• 3B4 SVX2 7(1-5,7,8)
  cftv1, 833-896 2 in
  VLPC 8
• 3A0 SVX7 5 (1-4,86 pixels)
  cftv2, 193-256
• 3B1 SVX7 5(1,2,6,7,8)
  cftv3, 2049-2112
• 3B0 SVX0 4(1,6,7,87pixels)
  cftv3, 2113-2176
• 3A4 SVX7 6(1,3-5,7,8)
  cftv3, 2241-2304
• 1B1 SVX0 8
  cftv4, 129-192 7
• 1B0 SVX4 6(1,4,5,6,7,8)
  cftv4, 321-384
• Looked at above boards with archiver damage
  appeared after 0ctober 13 power outage.
• 4A4 SVX7 2(1,25 pixels)
  cftu3, 1857-1920
• BA6 SVX6 1(8)
  cftu3, 4033-4096
• 4A6 SVX7 2(1,810pixels) cps
  cftu4, 1473-1536
• 4A7 SVX7 3(1,2,63pixels) cps
  cftu4, 1537-1600

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• 3A7 SVX3 6 cps
  cps
• 3B3 SVX3 7
  cps
• 3B6 SVX3 7
• 3B7 SVX3 1
  cps

13

• 3A7 SVX7 3 pixels alive pixels, VLPC channels
  32, 37, 38

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6B6 SVX 7Red standard bias1V
15
6B6 SVX 7Black standard bias1V
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6B6 SVX 7Red standard bias1V
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6B6 SVX 7Red standard bias1V
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6B6 SVX7

• Alive channels
• Channel VLPC fiber
• 3,13 35 2619
• 7,21 34 2620
• 10,26 22 2590
• 11,27 21 2563
• 25,52 32 2588
• 26,53 36 2598
• Hit Map during store

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6B6 SVX7VRB 15 hdi 0 chip 7

• 110 overflows, 6 alive channels
• 110/6641173 overflows if all alive, compare
  this with 1100 overflows in neighboring chip 6

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CFTX6 26-Nov-03
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CFTX6 26-Nov-03
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CFTX6 26-Nov-03
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CFTX6 26-Nov-03
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CFTX6 26-Nov-03
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CFTX6 26-Nov-03
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CFTX6 26-Nov-03
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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)