October, 2009 Internal Review Beam Instrumentation David Gassner

October, Beam Instrumentation Measure –Position –Current –Profiles –Emittance –Loss –Halo –Polarization –Path Length –Arrival Time (phase) versus Beam Energy, M 56 Also Included –Ion Clearing Electrodes –Scrapers –SRF Cavity HOM Power Monitors –Wien Filter (spin rotator) Estimates based on: - BNL Energy Recovery Linac - Colleagues at JLAB CEBAF

October, 2009 Position & Current 3 Position & Phase Button pick-up electrodes, 3 apertures sizes: 1cm, 2.5cm, 10cm 231 dual plane BPM’s Libera Brilliance Electronics High accuracy, low drift, built in processor, GB Ethernet, beam inhibit, etc.. Average orbit, mA, Single bunch, 0.1-5nC Multi-pass regions; 6 beams, each different energy, 3 accelerating, 3 decelerating. Path Length, Arrival Time versus Beam Energy, M 56 Strip-line BPM’s (8), and thermally stabilized copper 1-cell cavities (6) Current - Average beam current monitoring, DCCT (10) Bergoz NPCT (New Parametric Current Transformer) Resolution ~ 1uA/sqrt(Hz), DC-10kHz Differential configuration, monitor current recovery %, beam inhibit input. Reduce thermal drift effects by common null current through calibration windings - Single bunches or bunch trains Bergoz Integrating Current Transformer (10) - Faraday Cups: biased, impedance matched (4)

October, Loss & Polarization Beam Loss Monitors – Primary Machine Protection Hamamatsu PMT 931B (JLAB) 64 detectors 100nA sensitivity, self test <1us response <10us fast beam turn-off Long Ion chambers (heliax cables), 36 detectors Calibrated, continuous coverage Polarimeters Low Energy - Mott Thin foil target, destructive, low current only, rapid, precise measurements High Energy - Compton Laser, continuous, non-destructive, detect scattered electrons & photons Wien Filter Low energy spin rotator (E & B field) to orient polarization

October, 2009 Profile Monitors 5 Profiles (transverse & longitudinal) Screens, YAG & OTR (plunging, FireWire CCD cameras) 64 Synch light (Injector 2, Arcs 7 X 2 = 14) total 16 Halo Monitors (wires, high resolution, but slow) before Linac & each arc (8) Pepper Pot, low energy H & V emittance, using mask & screen Streak Cameras (2) - Hamamatsu C5680 Cherenkov viewer, bunch length, ps resolution Also Included: Ion clearing electrodes, 30 locations, 300V Scrapers at injector, (4) dual jaw, localize halo losses Schottky Diodes (SC Cavity HOM power monitor) 2/cavity Thermal imaging cameras, monitor beam pipe heating at injection (hard to measure losses) JLAB Ion Clearing Electrode

October, 2009 Beam Instrumentation Quantities items

October, Estimate by phase with contingency

October, 2009 Labor hours, FTEs, $

October, 2009 Estimated Material $