ACHIP Meeting

Monday 19 Sept 2016, 14:30 → 15:00 Europe/Zurich

Agenda: The plan is to check with you the advance towards the Milestones of SINDI chamber (injector) and the laser milestones. We will also report from the collaboration meeting in Erlangen.

ACHIP Meeting (19 Sep 2016)
Present: Marco Calvi; Eugenio Ferrari; Nicole Hiller; Rasmus Ischebeck; Eduard Prat Costa; Sven Reiche; Marie Silvia Siegler; Yelong Wei

 

 

1.) Recap from the collaboration meeting in Erlangen: 

 

• Collaboration partners present.
• Universities reported on progress modelling the electric fields over 100s of periods (mainly Darmstadt and industrial partners)
• Progress on coupling (how to get beam into structures via fibers or free-space)
• Source development: building laser triggered electron sources with a few keV electrons. Experiments on how to build the tips and coat them
• DESY: On track for building SINBAD (tunnel is cleared and installation can start)
• SLAC: NLCTA …. Lia Merminga (head of science at SLAC) recommends that we push for doing experiments there next year
• Eugenio reported on progress at PSI: First chamber available for damage tests (SINDI02-DLAC055), still awaiting permission to operate the chamber
• Advisory board: Reinhold Brinkmann, Lia Merminga, 3rd person
• Next Meeting big collaboration meeting to take place at PSI 1-3 March 2017 (Day 1: individual sup-groups meet, Day 2: plenary collaboration overview talks, Day 3: more discussions) -> still need to find a suitable room for about 50 people

 

2.) Going over the Milestone Poster

• Ready for beam 15-Sep 2016
  • Permits
    • WG Safety -> cabinet installation
    • WG Steering -> design change request accepted
  • CCD Functionality
    • Currently not possible to find electron beam on screen
    • Might be necessary to buy a new camera and cover larger field of view
  • GUI for controlling the setup
  • Beam loss monitor -> Need to check with Cigdem
  • Network and local control
• Ready for Experiments
  • Shifts (number and allocation)
    • Will allocate that when ready
  • Coordination with commissioning
• Experiments
  • Beam size
    • Eduard: Calculate optics for minimum beam size
    • Confirm calculations with measurements
  • Transmission through holed target
    • Waiting for BAG permission
  • Damage threshold
    • WG E-Beam: model of the beam
    • WG-Struct: model of field
    • WG-Exp:
      • laser data for the damage -> get collaboration partners from Erlangen to give a talk? 
      • acquire samples -> a few samples are in-house
      • invite colleagues for the experiment
      • measurement procedure -> can we get a trigger for a certain amount of shots?
  • Effects on beam
    • WG-Struct: scaled structure studies
  • Wire scanner
    • Master student will start next year
  • OTR/Cherenkov screen
    • Marie is working on a very compact OTR-screen version that could be used for the ATHOS chamber later on

 

3.) Updates from Marco concerning the quadrupoles

• Do we really need to be so precise with the actual gradient (0.2%) of the magnets or is it rather the integrated gradient that counts? -> Sven & Eduard: Rematching or changing of position of quadrupole could be done according to actual gradient if that is well known. 
• If you just want to move the quadrupole out without additional screening/shielding, then you do need to move it quite far out (like 50 cm), so this should be considered.
• In 2 weeks, we should have a prototype (without the magnet) that has the correct dimensions and weight for testing.