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Wire Scanner and BSRT status

Wire Scanner and BSRT status. F.Roncarolo , E. Bravin , A. Rabiller S. Bart Pedersen, A. Guerrero J.Emery , M. Sapinsky LHC BOC, 15-March-2011. Wire Scanners. Quite some work done on software and hardware Standard mode (40 MHz bunch-to-bunch)

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Wire Scanner and BSRT status

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  1. Wire Scanner and BSRT status • F.Roncarolo, E. Bravin, A. Rabiller • S. Bart Pedersen, A. Guerrero • J.Emery, M. Sapinsky • LHC BOC, 15-March-2011

  2. Wire Scanners • Quite some work done on software and hardware • Standard mode (40 MHz bunch-to-bunch) • Electronics installed on all devices and commissioned (J.Emery) • FE setup for synchronizing bunch selection (A.Guerrero) • OP GUI: few bugs corrected, new PRO version released (E.McCrory, T.Lahey) • Beam1: 200 Hz baseline noise on PM signal to be cured (J.Emery, TechStop) • Turn Mode (~ 10us Averaging) • B1 needs new delay w.r.t. turn clock to be adjusted in order to open gate at bucket 1 • B2 OK • General • FE fits (sent to Logging DB) to be checked (anyhow all profiles logged, Offline fit always possible) • Need MD to study absolute accuracy

  3. WS B1

  4. WS B2

  5. BSRT Hardware • During shut-down (A.Rabiller et al.) • Optical path re-alignment • Slow camera translation stage for additional remote focusing degree of freedom • Intensified Fast Camera installed • Alignment to be further improved (especially B1) as soon as new external lasers delivered • Fast Camera Ethernet connection not stable yet

  6. BSRT Software/Control • Front End (A.Guerrero) • Automatic optical filters and camera gain settings based on image acquisition feedback • DONE  get rid of theoretical tables vs beam energy&intensity • Automatic entrance mirror steering based on image acquisition feedback • Almost DONE can automatically look for best focus vs beam energy • BI Expert GUI (S.Bart Pedersen, E.Bravin) • subscription to FBCT  bunch lists • on demand bunch scans • Scan dies as GUI closed • OP Fixed Display (L.Ponce) • OP GUI (LAFS: Dennis Nicklaus) designed at early BSRT stage • Nobody using it • LAFS personnel (McCrory, Nicklaus, et al) are ready to modify/upgrade

  7. BSRT software NEXT • Front End • Fully commission and test stability of automatisms based on feed-back • Major upgrade: move profile fits from FE to daemon process on US45 PC (already used for automatic controls) • Bunch Scans (Front End and/or GUIs) • Short termEquip FE with FBCT subscription and automatically initiate scans ? • Upgrade OP Gui for bunch scans? Who?

  8. BSRT calibration • Preliminary results of cross-calibration w.r.t. WS • Camera translation allows to find a better focusing than last year • We will compute best correction factors vs energy and publish to logging • Many studies still needed to understand absolute accuracy • Focusing • Aberration (geometric,chromatic) • Diffraction Corr Factors 2010 2011 (prelim.)

  9. BSRT vs WS (preliminary)

  10. BSRT vs WS (preliminary)

  11. CONCLUSIONS • WS • 40 MHz operational • Absolute calibration to be studied • Need TS to investigate noise on B1 WS H and V • BSRT • automatisms for gain, focusing, steering almost all done, stability to be tested • absolute calibration to be studied • Bunch-to-bunch scans not automatic, need some more effort BI and OP • FAST camera (bunch-to-bunch, turn-by-turn) commissioning hopefully after TS • MD requests • ramp 1.38TeV (includes AGAP and LDM) • WS-BSRT cross-calibration • WS response to PM gain/ filters • Emittance preservation • General • Check beam optics at monitors

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