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BPM System Status P. Cameron 13 Aug 07

BPM System Status P. Cameron 13 Aug 07. Outline Notes from NSLS-II Design Review (last Thursday) System Block Diagram Process Variables DAQ status PUE status Meeting plans. Notes from NSLS-II Design Review

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BPM System Status P. Cameron 13 Aug 07

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  1. BPM System StatusP. Cameron13 Aug 07

  2. Outline • Notes from NSLS-II Design Review(last Thursday) • System Block Diagram • Process Variables • DAQ status • PUE status • Meeting plans

  3. Notes from NSLS-II Design Review Committee members: Marc Ross (FNAL), B.X. Yang (APS), Om Singh (APS/NSLS-II), Gunther Rehm (Diamond), Bob Hettel (SLAC) • Bergoz in-flange transformers have epoxy vacuum breaks, they leak, use BPM sum signal instead • Button design looks good, may be concern with trapped modes with high current (>100mA) and short bunches (<15psec rms) • Considerable discussion of Libera - presently this is NSLS-II baseline, driven by manpower, crossbar and feedbacks • Libera has required extensive local support from existing users (several man years at Diamond), ‘plug and play’ perception may not be realistic • DESY is exploring Xilinx demo board approach as Libera alternative, we are contacting them • At Diamond all orbit feedbacks, both slow (~0.1Hz) and fast (~100Hz) are implemented with reflected memory, no real-time EPICS involve

  4. Suggestions for upcoming meeting agendas • July 30th – AP presentation/discussion on beam and machine modes, global naming convention, MPS reqt’s for commissioning • Aug 6th – joint AP/Diagnostics discussion on Process Variables, Diagnostics Prioritization (AP shifted emphasis to ‘system status’ discussions) • Aug 13th - Scraper/Collimator • Aug 20th – presentation and discussion of BPM status • Aug 27th – presentation and discussion of BLM status • Sep 10th – presentation and discussion of DCCT and differential current status • Sep 17th– presentation and discussion of Profile status • Sep 24th, Oct 1st – ???? • Oct 8th – Preparation for Design Review • Oct 15th – Design Review • Committee members – at least 2 from NSLSII, maybe more? • Promote collaboration with those guys • Igor Pinayev, Om Singh, Bob Dalesio, else??? Sequence???

  5. BPM (also FCT, DCCT, BLM,…) Block Diagram

  6. threshold?

  7. BPM DAQ Status Two approaches under consideration: • COTS Xilinx demo board • We understand how to interface this board to timing and controls systems, and provide for 1 sec and abort PVs • Presently available hardware requires design and fab of digitizer mezzanine (not an issue, but…) • Negotiating with vendors regarding design and release of complete BPM board as demo board • As suggested by review committee, discussing with DESY • Presently running for Differential Current • Libera • Not clear how to interface this box to timing and controls systems, and provide for 1 sec and abort PVs. Hopefully this will be clarified by demo box • Demo box due in at the end of the month • FPGA source code (~1GB!!!) downloaded, uses old (>2 years) Xilinx tools and Linux

  8. BPM PUE Status Buttons are in house (qty 70, 64 required presently) • 4 installed on BPM block, leak-checked, measured (S-parameters, DC resistance, capacitance,…), baked to 150C (cert to 200C, known problems with all vendors at 250C), re-measured • Remainder are awaiting tech time for testing and sorting • Cables – RG-223 order soon? HOM probes • Installed in 5 cell cavity transitions ‘soon’ (plating problem) • Cables? LMR-195? BTF – use buttons (buy broadband ~5W RF amplifier?)

  9. Suggestions for upcoming meeting agendas • July 30th – AP presentation/discussion on beam and machine modes, global naming convention, MPS reqt’s for commissioning • Aug 6th – joint AP/Diagnostics discussion on Process Variables, Diagnostics Prioritization (AP shifted emphasis to ‘system status’ discussions) • Aug 13th - Scraper/Collimator • Aug 20th – presentation and discussion of BPM status • Aug 27th – presentation and discussion of BLM status • Sep 10th – presentation and discussion of DCCT and differential current status • Sep 17th– presentation and discussion of Profile status • Sep 24th, Oct 1st – ???? • Oct 8th – Preparation for Design Review • Oct 15th – Design Review • Committee members – at least 2 from NSLSII, maybe more? • Promote collaboration with those guys • Igor Pinayev, Om Singh, Bob Dalesio, else??? Sequence???

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