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The ALICE TPC

A04. A08. A00. A17. The ALICE TPC. A13. Number of MIPs to trip an Inner Chamber. Trip limit: 50 m A (or 0.3 m C ) Particle shower likely to trigger the experiment, i.e , effective track length in TPC is 2.5 m Therefore, at least 20000 MIP/chamber 15 MIP/cm 2.

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The ALICE TPC

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  1. A04 A08 A00 A17 The ALICE TPC A13

  2. Number of MIPs to trip an Inner Chamber • Trip limit: 50 mA (or 0.3 mC) • Particle shower likely to trigger the experiment, i.e, effective track length in TPC is 2.5 m • Therefore, at least • 20000 MIP/chamber • 15 MIP/cm2 ALICE TPC - Recent chamber trips

  3. Recent Inner TPC chamber trips.Note: only one chamber at a time 14.05.2010 IROC-A17 20:31:58.079 Measuringemittance? IROC-C13 21:10:56.149 Measuringemittance 15.05.2010 IROC A08 19:12:23.994 - IROC A12 19:24:24.258 - IROC A07 20:24:12.458 Measuringemittance 23.05.2010 IROC C17 06:40:08:914 Lumi scan in P1 24.05.2010 IROC A10 16:45:11:570 Beam dumped at ~17:30 (BLM) IROC A16 16:45:49:237 Beam dumped at ~17:30 (BLM) 25.05.2010 IROC C07 03:34:36:900 Between lumi scan in IP2 and lumi scan in IP8 IROC A07 03:52:22:798 ‘MICADO to compensate the lost of the H corrector’ IROC C01 04:28:34:465 ‘Lost corrector RCBH34.L7B1 correcting orbit’ (04:28) IROC C06 06:52:33:260 ‘trimmed Q'H on beam 1 by -0.5 unit’ (06:43) IROC A08 10:31:05:243 ‘LHCb reported that BPMs ( BPMSW) indicate a horizontal orbit drift of 400um over the course of the shift. However this seems to be unphysical, and may be related to temperature drifts of the BPMs... this needs to be looked at, as LHCb have a warning to move out their VELO if the orbit drift is >350 um’ (10:49) ALICE TPC - Recent chamber trips

  4. IROC C17 23.05.201006:40:08:914 • Lumi scan in P1 V0 ALICE TPC - Recent chamber trips

  5. IROC A10 24.05.201016:45:11:570 Beam dumped at ~17:30 (BLM) • IROC A16 24.05.201016:45:49:237 Beam dumped at ~17:30 (BLM) V0 Fill 1121 ALICE TPC - Recent chamber trips

  6. IROC C07 25.05.201003:34:36:900 • Fill 1122. Between lumi scan in P2 and lumi scan in P8 ALICE TPC - Recent chamber trips

  7. IROC C07 25.05.201003:34:36:900 • Fill 1122. Between lumi scan in P2 and lumi scan in P8 Same trip, other BLMs ALICE TPC - Recent chamber trips

  8. IROC C07 25.05.201003:34:36:900 • Fill 1122. Between lumi scan in P2 and lumi scan in P8 Same trip, V0 ALICE TPC - Recent chamber trips

  9. IROC A07 25.05.201003:52:22:798 • Fill 1122: ‘MICADO to compensate the lost of the H corrector.MCBH.30R6B1 (9.081 urad)’ ALICE TPC - Recent chamber trips

  10. IROC A07 25.05.201003:52:22:798 • Fill 1122: ‘MICADO to compensate the lost of the H corrector.MCBH.30R6B1 (9.081 urad)’ Same trip, V0 ALICE TPC - Recent chamber trips

  11. IROC C01 25.05.2010 04:28:34:465 • Fill 1122: ‘Lost corrector RCBH34.L7B1correcting orbit’ ALICE TPC - Recent chamber trips

  12. IROC C01 25.05.2010 04:28:34:465 • Fill 1122: ‘Lost corrector RCBH34.L7B1correcting orbit’ Same trip, V0 ALICE TPC - Recent chamber trips

  13. IROC C06 25.05.2010 06:52:33:260 • Fill 1122‘trimmed Q'H on beam 1 by -0.5 unit’ (06:43) ALICE TPC - Recent chamber trips

  14. Luminous region Fill 1121 Beam 2 bunches Beam 1 bunches ALICE TPC - Recent chamber trips

  15. Beam position Fill 1121 Beam 2 bunches Beam 1 bunches ALICE TPC - Recent chamber trips

  16. HMPID trips on 25.05.2010 at 07:34:38 and 11:18:26 ALICE TPC - Recent chamber trips

  17. ALICE muon trigger(72 Resistive Plate Chambers operated in avalanche mode) MT12 MT21 47/72 RPCs tripped at 17:28:43 05-06-2010 Fill 1134 MT11 MT22 View from the IP ATLAS IP2 CMS MT11 16 m 17 m MT12 ~ 6.5 m MT21 MT22 IP2 ~ 5.5 m

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