Present:

R. Catherall, A. Herlert, S. Meunier, H. Vestergaard, T. Giles, M. Eriksson, P. Fernier, J. Helene-Sarret, K. Hanke, A. Dorsival, G-J. Focker, E. Siesling, P. Delahaye and H. Frånberg.

 

The RFQ will be moved out from the section the 10 of January into the extension of 170.

 

Machining (early January):

DN100: for the two multi-pin and four SHV cables. Drawings exist by S. Marzari.

Adaptation work on the bellow connected after the RFQ.

2 x DN200: eight feed through for BNC connectors (after vacuum tests of the existing).

New DN 200 flange with DN 40 (ISO-K).

 

Orders, to be checked for delays:

DN100

3 x DN200

Bellow

3x SHV connectors

16 connectors for the triplets

Multi-pin connectors (ordered)

 

Vacuum:

S. Meunier will leak test to identify the leaks on the two DN200 for the triplets: December.

After re-production of the DN100 with multi-pin and SHV connectors the flinch should be given to S. Meunier for leak tests.

Leak tests of the DN 200 with the DN 40.

Pirani valves will be installed.

H. Vestergaard will provide information on the upgrade to standard of the RFQCB vacuum system. Although for 2008 the system will not be changed.

 

Power

Connection of the emergency buttons to the …. network

New power supplies for the extraction triplets (are these existing???)

 

Electronics (Instructions for this work will be provided in a separate document)

When the new DN 100 flanch is ready:

Demount the RFQ trolley.

Redo the connections of the RFQ electrodes (this work is very delicate).

 

Faraday cups and scanners

Calibration of positioning will be performed by G-J. Focker and J. Helen-Sarret in January when the RFQ is taken out.

 

Alignment

Positioning of the benders in the switchyard will be verified

Positioning of the RFQ extraction electrodes will be verified.

 

RF

K. Rudolf will be contacted to repair and make the RF reliable for the start-up.

P. Fernier is working on a stable upgrade design of the current version.

The possibility to purchase a industrial version is looked into.

 

Controls

E. Piselli is working on the voltage visualization of the RFQ electrodes.

Discussions with the AB-CO group on the front-end application of the integration of the RF and the gas injection. A possibility to couple this with the mass settings of the magnets will be verified.

Integration of the extraction triplets controls into the RFQCB controls. E. Piselli

 

Points to be discussed during the meeting:

VACUUM

  • Redo DN100 with the two multi-pin and four SHV connectors –  was leaking at 10-3 mbar l/s

Ø      Book the soldering at AP of the connectors onto the DN100

§         Test for vacuum if possible before redoing connections

Ø      Undo all inner connections and redo the soldering of the 23 electrodes. Instructions in a separate document. RFQ needs to be moved into the extension.

  • Redo the two DN200 for the quadrupole triplets. Each one with eight connectors. One feedthrough at least leaking on each of these.

§         Test for vacuum before remounting.

 

CONTROLS VACUUM

  • Please define what is necessary – AT-VAC

 

RF

  • Repair the RF amplifier, and make reliable! (Klaus Rudolf)
  • Continue work on a spare RF amplifier. Pascal Fernier to be checked/followed also by the RF group.

 

ALIGNMENT

  • Re-align the RFQ after all mechanical work.
    • Verify position of the HRS.FC680 and HRS.FC748.
  • Align with stable beam onto the scanner (April).
    • Verify calibration of the HRS.sc680 and HRS.SC746 wire scanner.

 

CONTROLS

  • Emiliano’s voltage visualization
  • Integration of the RF and gas in the ISOLDE CS (LINUX) if possible; new application AB-CO

 

HV MEASUREMENT

  • COLLAPS needs a precise measurement of the HV of the RFQ with accuracy better than 1V (10-5 accuracy). This already exists for the front ends.

 

 

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Tests to be done in April (one week eventually parallel with other tests we do not need CA0 beam line.)

  • 1 week before the tests: Verification of the RFQ components: vacuum, power supplies, controls, RF
  • Preferably plasma source to finish off the tests that couldn’t be done this year because of broken RF
    • trapping time for noble gas ions (losses due to chemical processes in the cooler)
    • tuning of the plasma source with respect to transmission efficiency in the RFQ (the most difficult source with the RFQ, the most interesting!)
    • operation at 60 kV.

 

Training AB/OP (1/2 a day during startup tests preferably in April)

  • Verification of transmission/RF/gas.
  • Continuous mode settings.
  • Bunched mode settings.
  • Vacuum system operation (non-standard!)

 

MD (even after start-up if necessary)

  • 4-6 hours setting up standard settings (QP array for RFQCB) for each new type of TIS unit.
  • 1 shift injection into REX trap.
  • ½-1 shift injection into ISOLTRAP.