Go to the Indico Home Page Oldest event Older event Up to category Newer event Newest event Printable version
 
Focus on:  Hide Contributions
  • Compact style
  • Indico style
  • Indico style - inline minutes
  • Indico style - numbered
  • Indico style - numbered + minutes
  • Indico Weeks View
    • Switch to the management area of this event
    Login

    SPS-BGI RF discussion

    → Europe/Zurich
    Hide

    Ocultar   

    Minutes

     

    Present: Hikmet (RF), William, Teresa, Wilfred (BI)

     

    Latest Impedance Updates of Vacuum Chamber

     

    CST simulations of 8 x different configurations:

     

    1. BGI Model (Stainless Steel Cathode)

    • Chamber 84 mm
    • Chamber 120 mm
    • Chamber 84/120 mm

    2. BGI Model (Ceramic Cathode – assumed as resistively coated)

    • Chamber 84 mm
    • Chamber 120 mm
    • Chamber 84/120 mm

    3. Ceramic Rod Location Comparison (update)

    Conclusions:

    • BGI Chamber with 120 mm and 84mm & 120 mm has similar longitudinal impedance response
    • BGI model with rod (located ~9 mm above the corner) is more effective on the mitigation of the peaks below 1.3 GHz

    Discussion

    • For the instrument, it is going to be used a Ø 12 mm rod placed ~9 mm above the corner. Hikmet will provide Frantisek the exact location of the rod.
    • The aperture and total length of the vacuum chambers for the vertical and horizontal instruments are fixed to Ø120 mm aperture and the original length. Integration studies will be performed, considering the beam line modifications agreed with survey and vacuum groups
    • Next Monday 15th BI and MME will meet to discuss the manufacturing deadlines. Depending on the outcome, work will be reorganised

     

    Next steps:

    • Meeting with AP to define the calendar
    • Teresa will design
      • Horizontal instrument:
        • Vacuum chamber Ø120 mm aperture 
        • Transition from BSRT flat aperture to Ø120 mm circular aperture
      • Vertical instrument: 
        • Vacuum chamber Ø120 mm aperture 
        • New transitions
        • New beam line Ø86 mm aperture 
    • Hikmet will simulate 
      1. 120 mm aperture + transparent cathode + Ø 12 mm rod at ~9 mm above the corner
      2. 1 + rod coating surface resistivity optimisation
      3. Beam line modifications for the horizontal and vertical instruments (Teresa will provide all the models), with and without instrument
    There are minutes attached to this event. Show them.