• Report from meetings
  • SLM -> MG

• Discussion of the injection test -> MG et al.

  • Nice summaries can be found here.

  • The first data from the FBCT can be seen here.

• Polarity checks in sector 7-8 -> RC (pdf)

  • Polarity problems (not to mention closed orbit correctors):

    • Trim Quad: QT13.78

    • Skew Sextupoles: RSS.A78

  • Doubtful cases: SD1.78, SD2.78, KOD.A78

  • Polarities OK:

    • Trim & Skew Quads: QT11.78, QT12.78 & MQS.78

    • Sextupoles: SF1.A78 (?), SD[1,2].A78

    • B3 Spool Pieces: RCS.A78

    • Octupoles: KOF.A78

• Geometry of beam separation and possible move of TCTV and y-chamber in IR2 -> JJ (pdf)

  • To avoid intercepting the spectator neutron with the TCTV in IR2, the y-shaped vacuum chamber should be displaced by about 2 m towards the IP.

  • The TCTV could then be installed downstream of the ZDC.

  • The preliminary analysis indicates that the clearance in the horizontal plane (distance between the beam envelope and the wall of the vacuum chamber is reduced by 3 mm).

  • Further checks are needed.

• Recent e-cloud heat-load simulation results (LHC and LHC upgrade) -> H. Maury (pdf)

  • No difference in terms of heat load is found for the first and second batch.

  • No issue with heat load is found for 50 ns spacing and nominal beam parameters (intensity can be even pushed up to 2×10¹¹ p/b).

  • For 25 ns spacing the dependence of the maximum SEY vs. bunch intensity is evaluated.

  •  High-luminosity upgrade requires separate cooling for IRs.

• AOB

Last update: 25-Sep-08
MG

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