P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 Philip Burrows John Adams Institute Oxford University FONT4 tests at KEK/ATF EM background.

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Presentation transcript:

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 Philip Burrows John Adams Institute Oxford University FONT4 tests at KEK/ATF EM background tests at SLAC/ESA (T-488) Status of IP Fast Feedback Prototype

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 FONT: Feedback On Nanosecond Timescales Oxford + Daresbury: Philip Burrows Glenn Christian Hamid Dabiri Khah Tony Hartin Alexander Kalinin Colin Perry Vice Glen White Graduate students: Christine Clarke Christina Swinson Ben Constance SLAC, KEK, DESY, CERN

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 IP Intra-train Feedback Concept e- e+ Vibrations/noise cause beams to miss one another Measure beam position Kick beam back into collision Feedback circuit Outgoing beams deflected ‘Intra-train’ FB

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 warm smaller detector larger detector smaller L* larger L* common cryostat QD0 QF1 vacuum connection & feedback kicker Seryi

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 ILC digital feedback prototype (FONT4) KickerBPM 1 Digital feedback Analogue BPM processor Drive amplifier BPM 2 BPM 3 e-

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 FONT4: latency budget Time of flight kicker – BPM: 7ns Signal return time BPM – kicker: 15ns Irreducible latency: 22ns BPM processor: 7ns ADC/DAC ( MHz cycles) 40ns Signal processing (8 357 MHz cycles) 25ns FPGA i/o3ns Amplifier 40ns Kicker fill time3ns Electronics latency: 118ns Total latency budget: 140ns

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 FONT4 hardware KickerBPM 1 Digital feedback Analogue BPM processor Drive amplifier BPM 2 BPM 3 e- In fabrication by TMD

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 FONT beamline at KEK ATF (1.3 GeV 3-bunch train w. spacing c.150ns) BPM processor board Amplifier/FB board FEATHER kicker

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 FONT4 initial beam tests (June 2006) KickerBPM 1 Digital feedback Analogue BPM processor Drive amplifier BPM 2 BPM 3 e- 154ns

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 June 2006: 1 st test of PCB version of analogue BPM processor 2 nd tests of digital FB: timing, synchronisation, triggering, gain adjustment in FPGA (ADC 714/10 = 71 MHz) November 2006: 3 rd tests of digital FB: ADC 357/4 = 90 MHz 2 nd tests of (modified) PCB BPM processor January – March 2007: 1 st test of FONT4 amplifier Closed-loop FB : Develop into ‘turnkey’ system : Deploy x, x’, y, y’ system at ATF2 FONT4 test plan

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 Oxford test bench setup

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 Oxford test bench setup

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 ILC interaction region Engineering details TBD!

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 Nominal IP feedback hardware locations Engineering details TBD!

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 Nominal IP feedback hardware locations Engineering details TBD!

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 Pair-induced EM backgrounds BPM e+e- pairs Low Z mask

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 Pair-induced EM backgrounds BPM e+e- pairs Low Z mask

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 FONT Test Module for ESA low Z mask beamcal BPM QFEX1 Material model of ILC outgoing beamline

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 FONT Test Module (T-488) Installation at ESA Beam

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 Beam scan across module (12 Jul 06) Noticeable degradation of signals 10**7 beam Modelling in progress

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 Modelling of ESA data Primary beam simulation and transport (MAD) Generate showering in module (GEANT3); track shower particles to BPM Simulate response of BPM to noise hits Beam scan across module

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 Modelling of noise on BPM strips

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 Simple time-of-flight analysis Primary beam signal Example of noise (for illustration only) Time (ns)

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 Simulated signal + noise results (work in progress)

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 Example showing beam scan vs. data data at x=1.75

P.N. Burrows ECFA/GDE Meeting, BDIR session, Valencia, 9/11/06 Details seem to matter Study of copper vs steel striplines (5000 input electrons) Watch this space for further developments… Particle Studio code being used for better signal modelling