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Preparation for Cool Down sec78 - Dec 7

RAT_20061207.pdf:
https://twiki.cern.ch/twiki/pub/HCC/BlogEntryPoint8x2006x12x07x12x29/RAT_20061207.pdf

Open Issues:

AC non-conformity

• 13.11.06 Non-conformity of the crates of cryo instrumentation (inrush current) (A.Suraci: ready next year)
• 13.11.06 Non-conformity of the AC cabling of the crates under the magnets. This concerns ACR, MEL, orbit corrector power converters & VAC.

DC cabling

• 30.11.06 Non conformity: 4 temperature sensor cables need repair (D.Bozzini, A.Suraci)
• 25.11.06 Functional test on the leads heaters: DFBAO, DFBMA, DFBMC, DFBXG
• 22.11.06 Pre-connection of 120A cables in LSSR7 (TS/EL)
• 20.11.06 Galvanic insulation installation on all DFBs (AT/MEL)
• 13.11.06 6 kA and 13 kA cables positioning at DFBAO, DFBMA, DFBMC (Flohe)

Vacuum - Cryogenics

• 22.11.06 Cryo-valves remote control in CCC by AB/CO
• 22.11.06 Control of quench valve

DFB Commissioning

• 04.12.06 Re-positioning collars used to fix the WRL to the CLs (all DFBs) (A.Perin-D.Bozzini-F.Millet)
• 29.11.06 Pumping of Current Leads insulation vacuum for DFBX
• 13.11.06 ElQA-TP4-A for all DFBs between 7 and 8 (D.Bozzini: next(w48): DFBAO HC module, DFBMA, DFBMC, DFBX))

Safety General remark: written communication in advance to announce operations!!!

• 25.11.06 ElQA-TP4B safety procedure (1900 volts tests!).
• 23.11.06 Wooden structure for UA access restriction (that will allow transport).
• 23.11.06 Preparation of a prototype insulating protection (derived from a plastic tube) of the monorail by J-C.Guillaume and approval by J.Etheridge.
• 23.11.06 Water leak on the tunnel concrete wall to be fixed (C33L8).
• 16.11.06 Cool down safety procedure & access conditions

Preparation of powering test

• 30.11.06 El_QA performed on C16L8. ICC test showed reversed sequence of V-taps on circuit RCBV16.L8B1. To be discussed on next RAT.
• 22.11.06 Installation of flexible cables by CV (UA83)
• 16.11.06 Water circulating in UA83 for the Powering Procedure Test: filters need to be checked.

AOB

• 13.11.06 BPM connection in Q2, Q3, Q4, Q5, Q6, Q7–wk49 (J-C.Guillaume & R.Jones)

MircoCoccoli - 07 Dec 2006 - 12:36