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Field errors correction strategies

Field errors correction strategies. Marek Strzelczyk Mike Lamont. Agenda. Sources of errors Correction methods Implemented Planned Questions & discussion. Sources of errors. MB Static b2, b3 , b4, b5 a1, a2, a3 Dynamic (b1) , b3 , b5 MQ Static ( b6) Dynamic b2

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Field errors correction strategies

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  1. Field errors correction strategies Marek Strzelczyk Mike Lamont

  2. Agenda • Sources of errors • Correction methods • Implemented • Planned • Questions & discussion

  3. Sources of errors • MB • Static • b2, b3, b4, b5 • a1, a2, a3 • Dynamic • (b1), b3, b5 • MQ • Static • (b6) • Dynamic • b2 http://lhc-commissioning.web.cern.ch/lhc-commissioning/operations/magnets/fidel-requirements.htm

  4. Implemented correction methods • MB b3 → MCS (per sector) • MB b4 (static) → MCO (per sector) • MB b5 → MCD (per sector) • MB b1 (dynamic) → orbit correctors (per sector)

  5. Planned correction methods • MB b2 → MQTF, MQTD (per sector) • Does not change the tune, but introduces phase advance errors which could be corrected sector by sector if required • MB a2 → MQS (per sector) • MB a3 → MSS (per sector)

  6. What remains • MB a1 → no feed-forward correction • No model • MQ b2 → MQTF, MQTD (as MB b2) • Decay amplitude of ~ 1.3 ± 0.4 units (individual magnet) • No decay parameters given (yet) • MQ b6

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