Elena TL: Status of studies and HW

Wednesday 19 Aug 2015, 09:30 → 12:30 Europe/Zurich

866 (CERN)

Present: R. Ostojic, M. Fraser, J. Jentzsch, W. Bartmann

 

Elena TL status:

 

• Optics layout being finalized, document being prepared

 

• LNS commissioning: diff pumping stage available at end of the year, SEM not known when, would need some money for dummy chambers, detectors, supports, cables
  • Need clear statement from Christian and Tommy if LNS commissioning prior to machine commissioning is of interest

 

• Quadrupole NEG coating not performing as expected; first bakeout below NEG activation temp OK, but NEG activation requires higher temperature than expected and does not pump as expected; chemical cleaning seems OK; all done within VSC;
  • One quad assembly will be dissassembled to check pumping of only the chamber (Sept-15?, VSC)

 

• Discussions about TL vacuum requirements ongoing
  • Add to discussion with experiments (1-October)
  • Prepare TL vacuum specification document (1-October)

 

• Prepare baseline of experiment handover positions, optical and physical (1-Oct)

 

• Status of deflectors:
  • First unit 33 deg (2 subfamilies) finished (little modifs this pm)
  • Second unit will be a lot of copy of first unit; relatively straightforward
  • Third unit (vertical bend of 80 deg) to be started

 

• Status of quads:
  • Batch of 12 units ready for NEG coating, but wait for results of opened assembly
  • Rest will be delivered at end of month

 

• Magnetic shielding
  • Incorporate stray field measurements in beam optics; simulate solenoid field acc to measurements and translate into multipole kicks on beam; time varying; take into account all possible errors (field, misalignment)
  • Prepare correction procedure as operational tool for commissioning (March-16)

 

• Phase 2/3 installation: timing not clear, manpower planning