BPM for Spectromety development status A. Lyapin

WP 4.2 meeting, 13 September Summary  BPM design more or less finalized  Al prototype ≥50% done, need ~2 weeks  Need to test the model and fix the tolerances ~2 weeks, may need to modify the design – got nicer feedthroughs  Test bench is operational  Cu (vacuum) prototype – design ≥50% done  Planning to start cutting copper in October  Material (OFC) purchased  Reference cavity – just started with the electrical design so far  Signal processing electronics – overall layout finalized, looking for components, putting together spreadsheets  Calibration scheme – overall layout finalized, key components found, quotes received (~£2-3k project)

WP 4.2 meeting, 13 September Prototype Al model  MSSL finished working on the waveguides (spark erosion)  UCL workshop to continue this week  Slots, holes for the feedthroughs to be put in, beam pipe to be cut to the dimension, other bits and pieces to be put in

WP 4.2 meeting, 13 September Prototype Al model

WP 4.2 meeting, 13 September Cavity BPM test bench  Test bench is up and running  2.8 GHz oscillator is on its way to UCL  VNA is on its way to RHUL

WP 4.2 meeting, 13 September Cu vacuum prototype  Most of the problems cleared, brazing seems to be ok  DN63 flanges to fit the rest of the ESA beamline, 8 through holes for support  Need to modify the feedthroughs  Reduced the length for easier machining, monopole rejection should be sufficient  Need some input from KEK on tuners

WP 4.2 meeting, 13 September Reference cavity

WP 4.2 meeting, 13 September Electronics

9 Electronics

10 Electronics

WP 4.2 meeting, 13 September Calibration scheme  Probably a final scheme now  Can actually use the drive line power, but want to use it for the LO  Still need to find suitable (high conversion gain) detectors  Passive elements are not a problem

WP 4.2 meeting, 13 September Calibration scheme