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Single bunch injection

Single bunch injection. Bunch intensity was between 2 to 5*10 9 . SPD HV was set to have 1/5 the nominal gain. PS HV set to PHYSICS (1MIP ~10 ADC) ‏ Gain ECAL : outer 2.5 K, medium 10K inner 20k Gaind HCAL outer 5k,  inner 20 K Run analyzed 50472.

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Single bunch injection

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  1. TED run June 6-7, 09 Single bunch injection Bunch intensity was between 2 to 5*109. SPD HV was set to have 1/5 the nominal gain. PS HV set to PHYSICS (1MIP ~10 ADC)‏ Gain ECAL : outer 2.5 K, medium 10K inner 20k Gaind HCAL outer 5k,  inner 20 K Run analyzed 50472. Cuts in the number of ADC counts to avoid represent noise. PS > 60, ECAL > 60, HCAL > 30.

  2. TED run June 6-7, 09 Single bunch injection (all events)‏ SPD PS HCAL ECAL

  3. TED run June 6-7, 09 Multi bunch injection Trains of 12 bunches with an intensity of 1.2*1010 protons per bunch. Same HV configuration for calorimeter as for single bunch injection. Run analyzed 50477. Same cuts in the ADC counts as before.

  4. TED run June 6-7, 09 Multi bunch injection (all events)‏ PS SPD ECAL HCAL

  5. TED run June 6-7, 09 SPD multiplicity vs BCID (1/5 nominal gain)‏ SPD mult 12 bunches in a train Time alignment problem Signal tails Low intensity beam before the train BCID

  6. TED run June 6-7, 09 SPD multiplicity vs BCID (1/25 nominal gain)‏ 12 bunches in a train with less multiplicity (factor ~2.5)‏ Signal tails TFC clock shifted by +7ns → nothing seen in BCID = 2686 Due to the reduced gain → the low intensity bunches are not seen.

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