Frank Gerigk, Jean-Michel Giguet, Mohammad Reza Khalvati, Tomoko Muranaka, Suitbert Ramberger, Karl-Martin Schirm, Rolf Wegner

CCDTL (F. Gerigk)

  • First 2 CCDTL cavites arrived at CERN, The Russian team doing the installation will arrive this Sunday in Geneva. From the CERN side we will need to prepare:
  • assembly procedure ready by 15.9 ( Benoit ), -> received draft from Benoit
  • laser tracker ready on 2.10, various survey measurements during the visit ( Jean-Frederic ), ok
  • vacuum equipment (pump, RGA) ready on 1.10 ( Jan ), ok
  • vacuum connection pieces (2x half-cell, 6x beam pipe), instrument-cross exists, ( Jean-Michel, Yves ) * (being cleaned),*
  • minimum vacuum support during their stay ( Jan ), ok
  • SM18 test stand ready for high-power tests from 15.10 onwards ( Jose ), in prepration.
  • water hoses and connectors ready on 1.10 ( Jean-Michel ), ordered
  • nuts and bolts and tools ready on 1.10 ( Jean-Michel ), nuts and bolts ok, tools in prepration,
  • Helicoflex joints ready on 1.10, (Jean-Michel) , ok
  • visa invitation Alexandr, ( Frank) , ok
  • subsistence + travel costs Alexandr (Frank), ok
  • GSM for Alexey ( Frank ), ok
  • admin, office, transport, etc, ( Frank ), ok
  • visual inspection of half tank gaskets at Alexandre Gerardin (Jean-Michel) , in progress
  • lifting arm will be put into the assembly area (chèvre) to be able to move tanks on the support but not to lift them (Jean-Michel, Yves) , ok
  • put some cabinets into the assembly area for material storage (Jean-Michel, Yves) , ok
  • provide blocks onto which the support frames can be put ( Jean-Michel, Yves) , ok
  • prepare coupler with movable tuner for measurements ( Jean-Michel, Rolf) , ok PIMS coupler works for CCDTL, piston tuner in bunker and movable short in assembly area,
  • are the counter olives for the welded SERTO fittings delivered by Alexey ( Frank) , ok
  • re-machining of assembly table (Jean-Michel, Yves ), under construction, Monday survey,

SM18 – Linac4 test stand (T. Muranaka, R. Wegner)

  • PIMS cavity re-tested for testing beam instrumentation (BPM and FCWT). Max RF power from the klystron-modulator system of ~ 700 kW peak, 0.8 ms, 2 Hz was quickly accepted by the cavity. Only a very few breakdowns could be seen.
  • Development of Labview control programme for the high power cavity tests have been in progress. Communication problem between Labview and automat will be fixed this afternoon.
  • Basic format for data taking, storage and filing for whole cavity test series will be discussed with Jose.

PIMS (R. Wegner)

  • Brazing test fully analysed (visual, vacuum, ultrasound). All test confirm excellent quality of brazing. Green light given to NCBJ for machine and braze the waveguide ring of cavity M for qualification.
  • Short module status: discs M_1 and G_2-3 at CERN. Discs M_14 and M_6-7 at CPL for repair (0.03 mm overlength at assembly diameter). No news. Ring M_13-14 being finished in CPL.
  • Ring M_1-2: X-ray analysis showed welding defect. Further analysis to verify defect.
  • Instruments purchased by NCBJ to do X-ray analysis of welds at NCBJ; reports will still be made at outside company (certification + experience)
  • Alternative for short module: Ring G_13-14 can be used instead of M-1_2 for short module (outside diameter is a bit too small)
  • Rings N,M,L will be sent to Julich for welding, is defect of ring M_1-2 is confirmed, repair will be arranged with Julich
  • Public tendering for new turning/milling machine started this week. In last offers, Chiron promised 24 weeks for delivery, DMG 28 to 32 weeks.
  • Support spacers: decision taken to finish support spacers of old design (splhapms0003-vAA) as initially foreseen and to stock/use them for something else at CERN. Support spacers and shims of old design (splhapms0003-vAC, splhapms0022-v0, splhapms0023-v0) are not urgent, delivery mid 2014 sufficient. Waiting for offer.

-- RolfWegner - 27-Sep-2012

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