Target Tracker

1
Target Tracker
2
Rate tests SM1
Sensor (1,3,4) no signal Plane 6
absent Sensor (1,2,7) no signal Sensor
(1,2,12) ch60 171 light leak low count
Sensor (3,1,12) no signal Sensor
(1,0,16) ch1 107 light leak Sensor
(1,2,16) ch64 304 masked (light leak) Sensor
(3,0,16) ch1 308 masked (light leak) Sensor
(3,2,16) ch64 295 masked (light leak) Sensor
(1,0,18) ch1 134 light leak Sensor
(1,3,20) ch64 226 masked (light leak) Sensor
(3,2,22) ch64 173 masked (light leak) Sensor
(1,0,23) ch1 3045 masked (light leak) Sensor
(3,0,23) ch1- 32 strange noise Sensor (3,3,25)
no signal Sensor (1,1,27) ch1 1653 masked
(light leak) Sensor (3,1,27) ch1 3733 masked
(light leak) Sensor (1,3,28) ch64 849 masked
(light leak) Sensor (3,1,28) ch1 251 masked
(light leak) Sensor (3,3,28) ch64 123 light
leak Sensor (1,2,29) ch1 328 masked (light
leak) Sensor (1,0,30) ch1 235 masked (light
leak)

• 1 TT wall absent
• 4 sensors absent
• 1 problematic chip or flat cable (32 ch.)
• "electronic" problem on ½ sensor
• Real light leaks 5 ch.
• Masked ch.12 (gt200 Hz)

3
Rate tests SM2
Sensor (3,0,1) no signal Sensor (0,0,4)
no signal Sensor (1,3,4) no signal
Sensor (1,3,11) low count Sensor (2,3,12)
absent Plane 13 absent Sensor (1,2,14)
no signal Sensor (3,2,14) no signal Sensor
(3,1,17) ch1 125 light leak Sensor
(1,1,18) absent Sensor (1,0,20) ch1 288
masked (light leak) Sensor (3,0,21) no
signal Sensor (1,2,23) ch64 2138 masked
(light leak) Sensor (3,2,23) ch64 1359
masked (light leak) Sensor (1,0,24) ch44 510
masked (light leak) wrong correction
factor Sensor (1,2,26) no signal Sensor
(3,1,26) no signal Sensor (1,0,27) no
signal Sensor (3,1,27) ch4 106 light leak
low count Sensor (0,1,28) no signal Sensor
(1,0,28) no signal Sensor (1,2,28) ch1
126 light leak Sensor (2,1,28) low count
Plane 29 absent

• 2 TT wall absent
• 13 sensors absent
• 2 problematic chips or flat cables (32 ch.)
• Real light leaks 2 ch.
• Masked ch.4 (gt200 Hz)

4
Light pulsers SM1
Sensor (0,0,1) pulse generator? Sensor (3,3,2)
pulse generator? Sensor (0,0,3) pulse
generator? Sensor (0,1,3) pulse
generator? Sensor (0,2,3) pulse
generator? Sensor (3,3,5) pulse
generator? Sensor (2,1,8) one LED does not
work Sensor (3,3,9) one LED does not
work Sensor (0,1,11) one LED does not
work Sensor (1,2,12) check the cable
connections Sensor (3,1,12) pulse
generator? Sensor (3,2,15) pulse
generator? Sensor (3,1,21) pulse
generator? Sensor (3,2,25) one LED does not
work? Sensor (3,3,25) pulse generator? Sensor
(3,0,27) pulse generator? Sensor (3,1,27) pulse
generator? Sensor (3,3,28) pulse generator?

• 13 l.i. absent
• 4 LED's or cables disconnected?
• 1 cable disconnected?

5
Light pulsers SM2
Sensor (1,1,2) one LED does not work Sensor
(0,0,4) pulse generator? Sensor (1,3,4) pulse
generator absent/broken Sensor (0,1,5) onle LED
does not work Sensor (3,0,10) only LED does not
work Sensor (1,3,11) check the cable
connections Sensor (1,1,16) pulse generator
absent/broken Sensor (1,1,19) pulse generator
absent/broken Sensor (3,1,26) pulse generator
absent Sensor (1,0,27) pulse generator
absent/broken Sensor (3,1,27) check the cable
connections Sensor (1,0,28) pulse generator
absent/broken Sensor (0,1,28) pulse generator?

• 8 l.i. absent
• 3 LED's or cables disconnected?
• 2 cables disconnected?

6
To do by TT group

• Replace the front-end cards where chip problems
• Investigate about "missing" light injectors
• magnetic field tests (ON/OFF) but after
• all sensors present
• all light injectors working properly
• all PMT numbers and correction factors checked

7
TT running modes
clear document under preparation in order all TT
shifters to be able to run all modes without
"experts" around"

• TT "Functions"
• pedestals
• rate/channel (few minutes)
• output channel distribution
• light injectors
• pulsing on one side and reading on the same side
• pulsing on one side and reading on the other side
• radioactivity (during long shutdowns)
• left/right correlations in order to remove DC
• cosmic rays (during long shutdowns)
• x/y correlations (how many, ideally 1 x/y
  correlation and read all TT walls)
• normal data taking mode

8
For this year(after discussion with DAQ group)

• Threshold 1 p.e (nominal value0.3 p.e)
• Mask all channels with rategt200 Hz, go lower if
  DAQ still gets stuck (PMT spec. lt300 Hz/channel
  for DC)

• For a common run with other detectors next week,
  TT is running since this morning in the following
  conditions
• all channels with rate gt 200 Hz masked,
• thresholds at 2 p.e,
• 2 x-y correlations (à la "Jacques"),
• every day stop and restart by hand the DAQ (Loic
  will do that, agreement with Artem) to
  re-activate possibly deactivated sensors and
  avoid problems with data-base.

9
Rate tests versus threshold
mean values for both SM
1 p.e
2 p.e
ch.
ch.
11.0 Hz(2 p.e)/18.5 Hz(1 p.e)
ch.
ch.
10
Super-covers and scotch problems?

• same pieces of scotch used after intervention to
  glue back the super-covers!!!
• nothing written in the TT logbook about these
  interventions!
• once more, nobody is allowed to make any
  intervention on TT without reporting in the
  logbook.