Collimators alignment in LSS7

D. Missiaen – 13/06/2014

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Agenda• Measurements of main magnets

• Deviation to theoretical position• Concept of smooth curve

• Measurements and alignment of collimators• Results

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Measurements of main magnets• First step in a survey : the measurements of

the main magnets• They constitute the SU measurements Network• In LSS7, typically :

• Cold ones : MQ, MB, MQTLH• Warms : MQWA, MQWB, MBW

• From measurements we determine in V and H:• Deviations to the theoretical position (in db)• Deviations to a smooth curve ( not in db)

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Deviations (in Vertical)

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Deviations (in Horizontal)

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Measurements of collimateurs• From the real position of the main magnets

• We measure and realign the collimators• In V :

• A global survey of all collimators• Realignment of the collimators «not declared by RP as very

radioactive» when necessary• Discussion with collimators experts and RP to decide which

ones are still to realign

• In H : • Measurement and Realignment of the collimators «not declared

by RP as very radioactive»• Measurement of the collimators «declared by RP as very

radioactive»• Discussion with collimators experts and RP to decide which

ones are still to realign

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Collimators (in V)

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Collimators (in V)

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Collimators (in V)

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Collimators (in H)

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Collimators (in H)

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Radioactive CollimatorsDéplacement ALTI [mm] Déplacement PLANI [mm]

"Hot RP" Aligné par SU E S E SLHC.TCP.D6L7 YES 0.24 0.04 -0.10 0.02LHC.TCP.C6L7 NO 0.20 0.23 -0.40 -0.40LHC.TCP.B6L7 YES 0.17 0.34 -0.07 0.34LHC.B2.TCLA.B6L7 NO 0.30 0.14 -0.11 -0.10LHC.TCAPA.6L7 YES 0.22 0.16 -1.00 -0.53LHC.TCAPB.6L7 NO -0.12 -0.10 0.28 0.23LHC.TCSG.A6L7 NO 0.10 0.13 -0.15 -0.27LHC.B2.TCLA.A6L7 YES -0.08 -0.09 0.16 0.49LHC.TCAPC.6L7 YES 0.23 0.06 0.64 0.18LHC.TCSG.B5L7 NO -0.21 0.02 0.16 0.33LHC.TCSG.A5L7 NO 0.01 -0.23 -0.12 0.10LHC.B2.TCSG.A5R7 YES 0.27 0.20 -0.30 -0.02LHC.B2.TCAPC.6R7 YES -0.11 0.20 -0.26 -0.04LHC.TCSG.6R7 YES 0.02 0.02 -0.23 -0.55LHC.TCLA.A6R7 NO -0.02 -0.02 -0.38 -0.37LHC.B2.TCSG.A6R7 YES -0.06 -0.08 0.21 0.45LHC.B2.TCAPB.6R7 YES 0.00 -0.01 -0.38 -0.53LHC.B2.TCAPA.6R7 NO -0.10 -0.02 -0.23 -0.02LHC.TCLA.B6R7 YES -0.16 -0.25 -0.49 -0.56LHC.B2.TCP.B6R7 YES -0.20 -0.11 -0.25 -0.34LHC.B2.TCP.C6R7 YES -0.10 -0.24 -0.53 -0.19

21 elements 13 elements

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Conclusions• All collimators in LSS7 measured• All colimators «non radioactive» realigned• Among the 21 «radioactive»

• 13 were realigned• 8 were not realigned

• The deviations to the theoretical position in in the GEODE database

• The deviation to the smooth curve is NOT (work is on going to have it)