Transcript 130409_tune_review_marek_PSB - Indico

PSB tune system after LS1
 Now:
• Four BBQ front-ends for each ring.
• One H+V BBQ acquisition with 16-bit ADCs.
• Signal selection though an analogue NIM multiplexer, the only NIM module in the system;
control with obsolete ICV196.
• Excitation: kick with one revolution pulse, strength adjusted manually on the high voltage power supply.
Same excitation for each ring by design (kickers connected together).
 PSB OP request for “after LS1”:
1. Chirp excitation with the transverse damper, as for the PS.
Excitation parameters can be common for each ring, with the possibility to turn the chirp
on/off for particular rings.
Motivation: resonant beam excitation to high amplitudes for machine studies.
2. Remote control for the high voltage power supply.
Motivation: kick adjustment according to actual requirements.
3. Acquisition per ring to measure four rings in parallel.
Each ring acquired with its own revolution frequency.
Motivation: ring matching for fine machine tuning.
 Required hardware modifications:
1. Use the DAC DAB mezzanines developed and used at the PS.
This would make the PSB and PS acquisition systems the same.
2. The HV power supply can be already controlled with an analogue signal.
The DAC mezzanine has already a slow DAC foreseen to control the kicker power supply.
3. Use four DABs with the ADC and DAC mezzanines.
The ring revolution frequencies are already in the tune rack.
M.Gasior, CERN-BE-BI
Tune systems after LS1
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