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Readiness for 450 GeV/c

Readiness for 450 GeV/c. G.Arduini for the Machine Check-Out Team (Mike, Reyes, Rossano) Special thanks to: E. Ciapala, B. Goddard, J.J. Gras, W. Höfle, S. Redaelli, J. Wenninger. 450 GeV/c. 450 GeV/c: All “Day-1” circuits available Precycle and injection plateau Safe Beam intensity

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Readiness for 450 GeV/c

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  1. Readiness for 450 GeV/c G.Arduini for the Machine Check-Out Team (Mike, Reyes, Rossano) Special thanks to: E. Ciapala, B. Goddard, J.J. Gras, W. Höfle, S. Redaelli, J. Wenninger LHCPerC

  2. 450 GeV/c • 450 GeV/c: • All “Day-1” circuits available • Precycle and injection plateau • Safe Beam intensity • RF for beam capture and radial steering • Instrumentation for optics characterization

  3. Magnet circuits & Power Converters • Available Sectors: • Sector 56 • Sector 67 • Sector 23 • Sector 78 • IT not fully HW Commissioned  tested only at injection (Pts. 2 & 8) • Warm magnets in: LSS 2/3/5/6/7/8

  4. Magnet circuits & Power Converters • Tested: • Alarms • SW interlocks (PC state)  procedures in place • Loaded settings for pre-cycle, injection and ramp • Control SW debugging • Preliminary tests for the squeeze, decay and snapback for sector 56 and verification of the specifications for ramp and acceleration rates vs. squeeze time, snap back,, etc.  feedback to HWC and revision of the parameters for the tests in the following sectors • Tracking verification for RB/RQD/RQF for two adjacent sectors • To be done: • Points 1 to 3 for the other sectors: typically 4-5 shifts once a sector is available

  5. Magnet circuits & Power Converters M. Strzelczyk, M. Lamont D. Nisbet

  6. Beam Instrumentation • Tested extensively during synchronization tests: • BPMs - OK • BTVs – OK • BST – OK (expts profited of it as well) • BLMs: • still issues for the logging of the full machine • test with radioactive source being completed this week (during nights) • Threshold controls still being investigated

  7. Beam Instrumentation • To be tested: • BCT/FBCT: • Application and fixed display available and tested • HW and front-end available • XPOC and capture acquisitions to be tested with beam during next injection test as well as EMC • Wire Scanners: • application and individual system tests completed • Test planned for next Monday 1/9 • BSRT (synch light monitor): • application available and individual system test completed • video transmission tested • Undulators to be HWC • BRSA (abort gap monitor)

  8. Beam Instrumentation • To be tested: • Tune measurement: • application available and tested in the injectors. Kicker controls to be tested (pending availability of MKQA) • BGI: • no gas injection system installed • To be verified whether the signal from residual gas ionization is sufficient (possibility to switch off ionization pumps if needed) • Video signal transmission not yet available due to missing SW for the remote control of the camera

  9. Collimators • Not available yet: • Alarms  FESA classes to be defined • Interlocks to be tested: • Position interlocks including TCDQ, TDI, TCLIA/B, TCDD • Temperature • Preparing for a test at the end of this week • IST completed • Control SW, logging and fixed displays available and tested • Movement and synchronization tested • TCDQ controls (movement and intlk. Functions) to be tested (ongoing) S. Redaelli

  10. Controls • All the main application SW is there and tested (at least in its main functionalities) • Settings generated and loaded in the HW as soon as sectors become available • Major issues: • Central Timing • BLM logging (concentrator stability)

  11. Injection system • Injection system thoroughly tested during past two injection tests: • Injection sequences • MKI controls • Slow and fast timings • Injection tuning tools • Verification of injection protection functionality to be completed: • during or in the preparation for the next injection test (few hours required) with beam permit available.

  12. LBDS • All HW and controls available • PM/XPOC prototype versions available • LBDS connected to access system and functionality verified • Energy tracking partly tested (3 out of 4 bends sectors + Q4 + Magnetic Septum connected) with nominal ramps to 5 TeV/c. Run with energy provided by one sector during the last 2 injection tests. • Detailed test plan available (c/o Brennan) to complete most of the tests by the middle/end of next week in view of an injection/dump test for beam 2. In particular: • Connection to BIC and BIC-LBDS test • TCDQ synchronized movement and interlocks • Links to injection system

  13. Interlocks • 50 % already enabled & a good fraction of them tested: • BTVs (all channels) • PIC (only the sectors affected by the test in a “soft” configuration, i.e. most of the entries maskable)  automatic test program allows rapid verification of the interlocks (~ 2 hours/sector) • WIC (all channels) – 1 WIC crate to be tested (need machine closed) • Collimators (to be tested thoroughly) • BLM (maskable input): to be tested at least for a few BLMs • Vacuum (LSS 2/3/6/7/8) enabled • ALICE and LHCb channels • FMCM connected but not tested (1 FMCM card likely not available before the start-up)  implications to be evaluated

  14. Interlocks • continued: • Most of them can be tested in parallel to HWC in the next 10 days (remaining experiments and FMCM at the beginning of next week) • Final verification of a few channels when beam dump connected and beam permits available • SW Interlocks: • Thorough checking ongoing as soon as sectors become available. • BTVs done

  15. Post-Mortem & Safe Beam Parameters • Post-mortem enabled during the last Synch. Test: • 20 events observed: all sent data been recorded correctly. Link between BIS and Timing system OK.  Left connected. • BLM PM data. Not reliable sending of data yet • Further client discussions to send PM data (not yet integrated in all BI systems, RF, etc…) • Received data can be browsed with the latest version of the PMDataViewer. • Beam PM framework ongoing, first vertical slice is planned to be ready for 10th of September. • Safe Beam Parameters: • Energy from LBDS-Beam Energy Meter available • Intensity with simulated values • Should be in place end of the week/beginning of next for tests

  16. RF • Synchronization: • SPS re-phasing operational • Pre-pulses, revolution frequency to BI, BT, Expts., control of the injection settings distributed for beam 1 and 2 • Injection bucket number selection tested • ACS Power: • All 16 cavities conditioned to 2 MV. • Remote control of power systems available in CCC • Reliability tests ongoing in parallel • ACS Low level: • RF feedbacks set-up in 10/16 cavities. Cavity phasing to be done. • Cavity voltage setting and function execution tested (LSA)

  17. RF • Low level controls (frequency program, phase loop, synchro loop, radial loop): • HW & front-end SW in test  Install in SR4 next week • Frequency setting and frequency program control from CCC by the end of next week (tbc) • Transverse feedback: • Power part HW commissioned • Available for excitation of the beam for tune measurement • Low level HW available by mid/end of September • Remote controls power part (Labview expert application for now) • Abort gap cleaning function to be developed • OASIS signals: • APW longitudinal pick-up acquisition installed and being tested • Damper signals in SR4 but not yet available in CCC ICC

  18. Vacuum • Beam Interlocks from vacuum valves in the available vacuum sectors (in strict collaboration with AT/VAC): • LSS 1-2-3-4-6-7-8, end of TI2/8 • Vacuum gauges, vacuum valve logging • Alarms • Need to test Accelerator Safety Block, presently disconnected after problem identified in the connection  Need closed machine • Need to test LSS5  Need CMS closed • Need to verify fine delays between interlock and vacuum valve closure for a few valves once the beam dump is connected to BIC (a few hours with closed machine)

  19. Issues • Frequent accesses for activities still ongoing • Lack of discipline resulting in frequent loss of searches and needs for patrols • Access system reliability: improved but still not satisfactory • Frequent loss of communication with QPS controllers requiring access (almost daily)  QPS team working on a solution for that • Timing & controls aspects • RF signals and controls availability from CCC on day 1 • Need machine closed, beam permits available and LBDS connected for final verification of the full chain of machine protection at least for a small subset of elements after systematic verification

  20. Summary and Conclusions • Try to progress with cold check-out in parallel with HWC as much as possible • Aim at preparing the machine for circulating low intensity beams for 10/9 with • Circuits made available from the HWC • minimum but well-tested machine protection in place for 450 GeV/c with low intensity • Instrumentation for qualifying the machine • RF equipment to allow capture and radial steering of the beam • 5 PM meetings in the CCC glass-box to review the status of the preparation, issues and next steps. We will • Follow-up of tests progress and procedures at: • https://espace.cern.ch/LHCMachineCheckout/default.aspx

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