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LHC Status Tue Morning 10 - July Bernhard Holzer, Jan Uythoven

LHC Status Tue Morning 10 - July Bernhard Holzer, Jan Uythoven. Mon Late 16:00h cryo back 17:00h LHC “on”, no QPS hick ups, start precycle 17 :40h injection probe beam 17:40h Q20 pilot in ... RF phase error. Mon Late. 20:34h. First high intensity Q20 bunch in. 3.26e+11.

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LHC Status Tue Morning 10 - July Bernhard Holzer, Jan Uythoven

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  1. LHC StatusTue Morning 10-July Bernhard Holzer, JanUythoven LHC 8:30 meeting

  2. MonLate 16:00h cryo back 17:00h LHC “on”, no QPS hick ups, start precycle • 17:40h injection probe beam • 17:40h Q20 pilot in ... RF phase error ... LHC 8:30 meeting

  3. MonLate 20:34h First high intensity Q20 bunch in. 3.26e+11 εn ≈ 2.0 22:14h ramp ... with problems ... emittances after Squeeze: B1H = 4.2 B1V = 1.5 B2H = 2.8 B2V = 4.2

  4. MonLate / Night 23:00h stable beams preliminary pile-up number from CMS at start of SB: 45 from ATLAS at start of SB: 30 23:58h beam dump & cycle 01:25h new injection, ramp, squeeze ... 02:15h beam dump: High losses on B1, we decided to dump since the pile-up wouldn't be better than before. 03:19h new injection B1 heavily unstable during the squeeze  dumped by operator 05:35h new injection LHC 8:30 meeting

  5. Tue Morning 07:00h... finally stable beams

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