Overview of pre cycling 08
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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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Agenda
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 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
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
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
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
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
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
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
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
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 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
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 20081
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
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.














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