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Overview of Pre-cycling ‘08. M ário Pereira. Agenda. Precycle generation principles Generators Database scheme Currents LSA setting Pre-cycling 2008 Example of pre-cycling in 2008 Q&A. Precycle generation principles. Precycle generator
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Overview of Pre-cycling ‘08 Mário Pereira
Agenda • Precycle generation principles • Generators • Database scheme • Currents LSA setting • Pre-cycling 2008 • Example of pre-cycling in 2008 • Q&A
Precycle generation principles • Precycle generator • Dedicated generator for each precycling prescription type • Precycle definition in LSA DB • Precycling mode • Precycling type • Precycling prescription attributes • Precycling prescription defined per magnet type
MB STANDARD MAGNET_TYPE PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_MODE MB MB_50A 50A MB MB_RAMPDOWN RAMPDOWN MB MB_STANDARD STANDARD PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_TYPE MB_STANDARD FUNCTION_PRECYCLING PRECYCLING_PRESCRIPTION_NAME ATTRIBUTE_NAME ATTRIBUTE_VALUE MB_STANDARD FLAT_TOP_CURRENT 8000 MB_STANDARD FLAT_TOP_LENGTH 1000 MB_STANDARD INJECTION_CURRENT 757.5903 MB_STANDARD RAMP_RATE_DOWN 10 MB_STANDARD RAMP_RATE_UP 10
MQ STANDARD MAGNET_TYPE PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_MODE MQ MQ_RAMPDOWN RAMPDOWN MQ MQ_STANDARD STANDARD PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_TYPE MQ_STANDARD FUNCTION_TIMECONSTDOWN PRECYCLING_PRESCRIPTION_NAME ATTRIBUTE_NAME ATTRIBUTE_VALUE MQ_STANDARD FLAT_TOP_CURRENT 5000 MQ_STANDARD FLAT_TOP_LENGTH 1000 MQ_STANDARD RAMP_RATE_DOWN 10 MQ_STANDARD RAMP_RATE_UP 10
MQT STANDARD MAGNET_TYPE PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_MODE MQT DEGAUSS STANDARD PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_TYPE DEGAUSS FUNCTION_BIPOLAR_DEMAGNETIZE_V2 PRECYCLING_PRESCRIPTION_NAME ATTRIBUTE_NAME ATTRIBUTE_VALUE DEGAUSS CYCLES 4 DEGAUSS DIMINISH 1 DEGAUSS FLAT_BOTTOM_LENGTH 100 DEGAUSS FLAT_TOP_LENGTH 100
MQM STANDARD MAGNET_TYPE PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_MODE MQM 1Q_STANDARD STANDARD MQM MQM_RAMPDOWN RAMPDOWN PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_TYPE 1Q_STANDARD FUNCTION_TIMECONSTDOWN PRECYCLING_PRESCRIPTION_NAME ATTRIBUTE_NAME ATTRIBUTE_VALUE 1Q_STANDARD FLAT_TOP_CURRENT 5000 1Q_STANDARD FLAT_TOP_LENGTH 1000 1Q_STANDARD RAMP_RATE_DOWN 10 1Q_STANDARD RAMP_RATE_UP 10
MCO, MCS STANDARD MAGNET_TYPE PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_MODE MCO MS_DEMAGNETIZE STANDARD MCS MS_DEMAGNETIZE STANDARD MCS MS_RAMPDOWN RAMPDOWN PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_TYPE MS_DEMAGNETIZE FUNCTION_BIPOLAR_DEMAGNETIZE PRECYCLING_PRESCRIPTION_NAME ATTRIBUTE_NAME ATTRIBUTE_VALUE MS_DEMAGNETIZE CYCLES 1 MS_DEMAGNETIZE DIMINISH 0 MS_DEMAGNETIZE FLAT_BOTTOM_LENGTH 100 MS_DEMAGNETIZE FLAT_TOP_LENGTH 100
MCD STANDARD MAGNET_TYPE PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_MODE MCD MCD_50A 50A MCD MCD_DEMAGNETIZE STANDARD PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_TYPE MCD_DEMAGNETIZE FUNCTION_BIPOLAR_DEMAGNETIZE PRECYCLING_PRESCRIPTION_NAME ATTRIBUTE_NAME ATTRIBUTE_VALUE MS_DEMAGNETIZE CYCLES 1 MS_DEMAGNETIZE DIMINISH 0 MS_DEMAGNETIZE FLAT_BOTTOM_LENGTH 100 MS_DEMAGNETIZE FLAT_TOP_LENGTH 100
MCBCH, MCBCV STANDARD MAGNET_TYPE PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_MODE MCBCH MCBCH_STANDARD STANDARD MCBCV MCBCV_STANDARD STANDARD PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_TYPE MCBCH_STANDARD FUNCTION_CORRECTOR_PRECYCLING MCBCV_STANDARD FUNCTION_CORRECTOR_PRECYCLING PRECYCLING_PRESCRIPTION_NAME ATTRIBUTE_NAME ATTRIBUTE_VALUE MCBCH_STANDARD FLAT_TOP_CURRENT 50 MCBCH_STANDARD FLAT_TOP_LENGTH 1000 MCBCH_STANDARD RAMP_RATE_DOWN 10 MCBCH_STANDARD RAMP_RATE_UP 10 MCBCV_STANDARD FLAT_TOP_CURRENT 50 MCBCV_STANDARD FLAT_TOP_LENGTH 1000 MCBCV_STANDARD RAMP_RATE_DOWN 10 MCBCV_STANDARD RAMP_RATE_UP 10
MQXA, MQXB STANDARD MAGNET_TYPE PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_MODE MQXA MQXA_RAMPDOWN RAMPDOWN MQXA MQXA_STANDARD STANDARD PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_TYPE MQXA_STANDARD FUNCTION_TRIPLET_PRECYCLING MQXB_STANDARD FUNCTION_TRIPLET_PRECYCLING PRECYCLING_PRESCRIPTION_NAME ATTRIBUTE_NAME ATTRIBUTE_VALUE MQXA_STANDARD FLAT_TOP_CURRENT 4000 MQXA_STANDARD FLAT_TOP_LENGTH 600 MQXB_STANDARD FLAT_TOP_CURRENT 6000 MQXB_STANDARD FLAT_TOP_LENGTH 200
Magnet types using 4Q_STANDARD MAGNET_TYPE PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_MODE MCBH 4Q_STANDARD STANDARD MCBV 4Q_STANDARD STANDARD MCBXH 4Q_STANDARD STANDARD MCBXV 4Q_STANDARD STANDARD MCBYH 4Q_STANDARD STANDARD MCBYV 4Q_STANDARD STANDARD MCOSX 4Q_STANDARD STANDARD MCOX 4Q_STANDARD STANDARD MCSSX 4Q_STANDARD STANDARD MCSX 4Q_STANDARD STANDARD MCTX 4Q_STANDARD STANDARD MQS 4Q_STANDARD STANDARD MQSX 4Q_STANDARD STANDARD MQTLH 4Q_STANDARD STANDARD MQTLI 4Q_STANDARD STANDARD MS 4Q_STANDARD STANDARD MSS 4Q_STANDARD STANDARD PRECYCLING_PRESCRIPTION_NAME PRECYCLING_PRESCRIPTION_TYPE 4Q_STANDARD FUNCTION_BIPOLAR_DEMAGNETIZE PRECYCLING_PRESCRIPTION_NAME ATTRIBUTE_NAME ATTRIBUTE_VALUE 4Q_STANDARD CYCLES 1 4Q_STANDARD DIMINISH 0 4Q_STANDARD FLAT_BOTTOM_LENGTH 100 4Q_STANDARD FLAT_TOP_LENGTH 100
Pre-cycling in 2008 • During the first days of commissioning: • Poor pre-cycling discipline • MBs cycled to different flat top currents: • HWC constraints • Pre-cycle not generated with correct current • MQ: • Due to good machine behavior pre-cycle was skipped.
Pre-cycling in 2008 • During the first days of commissioning: • Other Circuits: • in general only separators and IPQs were pre-cycled • correctors sometimes skipped • Some correctors, orbit correctors and octupoles were missed. • Warm magnets • Triplets were done by hand (fixed now). • Software was still being debugged
Pre-cycling in LSA • Flat top currents can be explicitly defined as an attribute • PNO current can also be used from LSA database as a fraction of the defined FT current. • Different magnets of the same class can have different FT currents.
