Status of Inner Triplet Correctors

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Status of Inner Triplet Correctors

• For Corrector Team(
• M. Karppinen, AT-MEL-MC

) C. Fernandes, C. Giloux, V. Granata, H. Lopes,
J. Mazet, D. Rodrigues, W. Venturini
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Status of Inner Triplet Correctors

• MCBX Horizontal and Vertical Dipole-corrector
• MCSTX Sextupole-dodecapole Insert of the MCBXA
• MQSX Skew quadrupole
• MCSOX Skew octupole octupole skew sextupole
• Summary

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Inner Triplet Correctors
Q3
Q2
Q1
MQXA
MQXB
MQXB
MCBX
MQXA
MCBXA
MQ S X
MCS OX
MCBX
B PM
B PM
LMQXC
LMQXA
LMQXB
A1 / B1
A1 / B1
A1 / B1 B6 / B3
B4 A4 A3
A2
To IP ?
FNAL supplied
KEK supplied
CERN supplied
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MCBX(A), Inner Triplet Dipole Corrector
27 3 off single-aperture assemblies supplied
by Sigmaphi (F)
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MCBX Status

• In production delivery rate 2 MCBX/month
• 21 magnets delivered to CERN (3 failed)
• 10 magnets delivered to FNAL (incl. 1 MCBXA)
• Last magnet to Fermilab by the end of 2004
• Warm and cold tests at CERN (bottle neck, 2
  tests/month)
• Starting-up took more time than expected
• Short (520 mm) prototypes (MCBXS, MCBXT) adapted
  and shipped to FNAL for the first two Q2s
• First pre-series (720 mm) delivered Aug -02
• Magnet destroyed during cold test at CERN Dec -02
• Coil assembly Pre-preg ? Vacuum impregnation
• Assembly tooling modification and trials made in
  Jan-Feb -03

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MCBX Deliveries
Block 4 shutdown
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MCBX Quench performanceIndividual powering of
MCBXV (inner dipole)
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MCBX Quench performanceIndividual powering of
MCBXH (outer dipole)
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MCBX Quench performanceCombined powering
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MCBX(A)
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MCBX Transfer function at 1.9 K
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MCBX Hysteresis of B1/A1
Outer dB1 3.8 E-03 Tm, ?k 2.5 / 0.16 µrad _at_
450 GeV / 7 TeV
Inner dA1 6.1 E-03 Tm, ?k 4.1 / 0.26 µrad _at_
450 GeV / 7 TeV
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MCBXV (Inner dipole) Field Quality at 550 A
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MCBXH (Outer dipole) Field Quality at 550 A
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MCBX 12 Warm Cold Field Quality
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MCSTX (of MCBXA) Status

• 9 off production of B3-B6 inserts at CERN
• 6 completed
• 1 destroyed in MCBX 2 test
• 2 tested in MCBX 4, problems with data
  acquisition and power supplies
• 4 successfully tested in MCBX 8
• 3 being tested in MCBX 7
• 7-10 completed by May -04
• Request for more sextupole strength
• Short (520 mm) prototype reached 150 A in
  rotating 3.3 T dipole field
• 4 reached 120 A during combined powering.
• Inom 50 A ? 100 A

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MCSTX Parameters
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CD1000630 - MQSXA
9 single-aperture assemblies supplied by Ansaldo
(Ormet)
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MQSX MCSOX
Skew octupole (MCSOX)
Skew sextupole (MCSSX)
Skew quadrupole (MQSX)
Octupole (MCOX)
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MQSXA Status

• 1 model, 1 pre-series MQSXA (combined design)
  tested by March -03
• Design change due to modified Q3 lay-out
• 8 MQSX and 8 MCOSX at CERN. Last MCSOX 1 spare
  MQSX-MCSOX pair by March 04.
• 3 MQSX and 3 MCSOX- assemblies of the new design
  successfully cold tested at CERN and shipped to
  Fermilab
• Warm and cold tests at CERN
• Delays
• In shadow of MQT/S-contract (shared resources)
• Delays in G11-items (central posts/end spacers)
• Tooling development required close follow-up by
  CERN staff

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MQSXA Parameters
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MQSXA Quench Performance
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MQSX Skew quadrupole Transfer function at 1.9K
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MQSX Field quality at 1.9 K and 550 A
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MCSSX Skew Sextupole Magnetic performance at 1.9K
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Summary

• MCBX
• In production 2/month, 17 of 27 delivered to
  CERN,
• 10 tested at CERN
• 10 delivered to FNAL, last delivery expected by
  Dec -04
• Field quality seems ok
• MCSTX
• 6 completed at CERN. MCSTX 10 complete by May
  -04.
• 2 tested, 1 MCBXA shipped to FNAL
• MCSX 100 A seems feasible
• MQSX / MCSOX
• 1 MQSXA, 8 MQSX and 8 MCSOX assemblies delivered
• MCSOX 9 and spare MQSX/MCSOX expected in March
• 3 pairs tested and shipped to FNAL