Progress Towards Data Synchronisation

FONT IPBPM shift plan for early first week February 2016 Neven Blaskovic & Talitha Bromwich

Baseline noise floor  Jitter run with 70dB attenuation 5 m

Symmetric mode study

 Access to replace hybrids with power splitters on IPA, IPB and IPC (ZX10R-14-S+ DC to 10,000 MHz). 15 minutes  Centre beam as best as possible in all three BPMs. 5 minutes 1 h  Take simultaneous waveforms on all BPMs at different charges. 0.05 to 0.7 x 1010 in steps of 0.05 at 0dB. Jitter runs of 100 triggers. 15 minutes  Jitter run with 70dB attenuation at a charge of ~ 0.4 x 1010. 5 minutes

Single port study (2 ports on separate electronics) – IPA  Access to send 2 ports of IPAY through IPA and IPB electronics. 15 minutes  Beam waist on IPA (144A at QD0FF). Roughly centre the beam in IPA. Charge ~ 0.4 x 1010. Operate at 30dB attenuation. 5 minutes  Jitter run. 5 minutes  Wide-range (±4V) calibration scan (11 mover steps, 25 triggers per step) x 4. 16 minutes 2 h  Access to switch electronics. 10 minutes  Calibrate x 4. 16 minutes  Access to switch electronics. 10 minutes  Calibrate x 4. 16 minutes  Access to switch electronics1. 10 minutes  Calibrate1 x 4. 16 minutes

Single port study (2 ports on separate electronics) – IPB  Repeat for 2 ports of IPBY through IPA and IPB electronics. 2 h  Beam waist on IPB (137A at QD0FF).

Single port study (2 ports on separate electronics) – IPC  Repeat for 2 ports of IPCY through IPA and IPB electronics. 2 h  Beam waist on IPC (123A at QD0FF). Roughly centre the beam in IPC.

Access for hardware changes and set-up for next shift  Access to return to normal IP BPM set-up.  Swap FONT5 to FONT5A board (instrumenting P2, P3 & MFB1FF). 1 h  Remove ZPULs.  Remove 6dB attenuation from MFB1FF. 1 Optional FONT upstream feedback shift plan for late first week February 2016 Glenn Christian, Neven Blaskovic & Talitha Bromwich

1 bunch mode  Set trim DACs  Set scan delays  Set bunch strobes  Set LO phase shifter  Centre BPMs 2 h  Check scan delays  Check bunch strobes  ±10° phase scan  BPM mover scan  Jitter run – resolution?

2 bunch mode  Jitter run – bunch-to-bunch correlation? 1 h  If poor, consider extraction kicker timing scan and/or bunch separation scan  Check kicker timing  K1 kicker scan  K2 kicker scan2 2 h  K1-P2 latency scan (constant DAC mode) – K1 bunch strobe select off?  K1 & K2 coupled loop latency scan (constant DAC mode)1  K1-P2 single-loop feedback run using nominal gain (including long run)  K1-P2 single-loop feedback run scans: o Incoming beam orbit scan (‘T-shirt plot’) 3 h o BPM mover scan o Feedback gain scan

2 Optional as it involves coupled-loop feedback Other items

Progress towards data synchronisation

 Add upstream FONT5 board and SIS digitiser EPICS timestamps to data file

SIS digitiser sample jumps

 Monitor SIS digitiser sample jumps

 Discuss issues with ATF staff

IP BPM mover system

 Address issues with LAL and ATF colleagues:

o Discontinuities in I and Q signals during mover scans that make it difficult to calibrate at low attenuations

o Variable numbers of triggers per mover step in the AB mover

o Noise on the C mover voltage read backs