Dry Run Summary

1. Dry Run Summary Week 26: MKQA & AC Dipole Week 27: RF D. Jacquet, M. Gruwe, L. Ponce, E. Veyrunes, xxx, V. Kain, R. Alemany https://espace.cern.ch/mddb/Systems%20Dry%20Run%20Tests/Home.aspx LHC Beam Commissioning Meeting V. Kain & R. Alemany

2. Week 26: MKQA & AC dipoles B2 H B2 V LHC Beam Commissioning Meeting V. Kain & R. Alemany

3. Week 27: RF Beam Control • RF POWER • 4 RF modules composed of • A power converter to generate the High voltage • 4 HV lines • HV cables, klystron, circulators, RF load, wave guides and the high power couplers • 4 superconducting cavities • powered independently by the high power lines. • In the same cryostat • Total of 8 cavities per beam • RF LOW LEVEL • 1 Cavity controller per cavity (generate the voltage reference for the cavity) • 1 Beam control module per beam (generate the master RF) • 1 RF synchro module (ensure LHC/SPS synchronization, clocks and pre-pulses) Dry Run 28.05.2009 W27 LHC Beam Commissioning Meeting V. Kain & R. Alemany

4. cav1B1 cav2B1 cav3B1 cav4B1 cav4B2 cav3B2 cav2B2 cav1B2 IR4 cav8B2 cav7B2 cav6B2 cav5B2 cav5B1 cav6B1 cav7B1 cav8B1 tunnel High power line High power line High power line High power line High power line High power line High power line High power line High power line High power line High power line High power line High power line High power line High power line High power line Coupler pos Voltage Q High Voltage Cavity Controller Cavity Controller Voltage I Cavity Controller Cavity Controller Cavity Controller Power converter Cavity Controller Cavity Controller Cavity Controller Cavity Controller Cavity Controller Cavity Controller Cavity Controller Cavity Controller Cavity Controller Cavity Controller 400 MHz reference Cavity Controller UX451 FGC Beam Control B1 FGC Frev Pre-Pulses Clocks FGC Beam Control B2 RF Synchro SR4

5. *parameters we can trim BEAM CONTROL Simplified view (1 module per beam) Master RF (400Mhz ref) Cavity controllers VCXO (voltage control crystal oscillator) Frequency Program F SYNCHRO-LOOP  Measurement Loops gains/Tau/A RF RFG Radial steering BEAM CONTROL LOOPS MODULE -Phase loop -Radial loop -Synchro loop Coarse freq prog  (F/F prog)  (RF cavity/Beam phase) Radial pos PHASE-LOOP  Measurement RADIAL-LOOP Position Measurement Beam phase Cavity phase ….. Radial PU beam Phase PU Cavity Cavity

6. Week 27: RF Beam Control • Status of all the loops will be added to power application (For the time being only visible through expert application). • New FGC version not ready yet. Normal monitoring not working for the time being. Can use Delphine's application for FGC monitoring. Equipment Control -> RF LHC Beam Commissioning Meeting V. Kain & R. Alemany

7. Week 27: RF Beam Control • Sequence tasks for making sure that everything is set for synchronisation with the LHC in the SPS and re-phasing on are not ready yet. LHC Beam Commissioning Meeting V. Kain & R. Alemany

8. Week 27: RF Beam Control • The RF front-ends: cfv-sr4-allsync1,...always appear red in Diamon even though everything is fine with them. • Logging of errors of synchro, phase, radial is on_change right now; should be continuous logging. Otherwise logging of loops status and errors works!! VCXO control input logged. Frequency logged. LHC Beam Commissioning Meeting V. Kain & R. Alemany

9. Week 27: RF Beam Control • Sequence "prepare for filling": include checks whether everything was OK: • Warning OP Enable = True • Reset Synchro • Check Run Status for Synchro • Start Frev Master 1/2 • check Status s1Run = true • refresh Status • Disable all loops • Enable Synchro loop • Check whether synchro(radial) loop is locked -> This will have to be replaced eventually by task which checks every second whether the loops are locked for 10 seconds. • Wait 1s • Enable Phase loop • Reset Frev Master 1/2 • Check Status s1Run = true and s1FirstStart = true • Check property Status • wait 1s • start 40 MHz 1/2 + references • Check Status s1Run = true LHC Beam Commissioning Meeting V. Kain & R. Alemany

10. Week 27: RF Beam Control • Also saw some problems with trim: "cancel last trim" did not work anymore. If started from LHC CCM could not log in. • Loading settings (actual and functions) works for the current version of the FGC. We will retest with the new version in 2 weeks. Monitoring of the FGCs will only work properly then. • Last sequence: "re-phasing for collisions" will not be testable before beam. LHC Beam Commissioning Meeting V. Kain & R. Alemany

11. Week 27: RF Beam Control (Radial modulation + feedback) • How to monitor what is coming through the real-time input? • Need to have information whether real-time input is enabled. Needs to be shown somewhere: fixed display maybe... • The read-command for FGCs whether real-time input enabled needs to be added to equipState (runFGC+: mode.RT...this has to be in mode.RT=sum not mode.RT = direct). • Could not test radial modulation during dry run due to the problem with the RF beam control hardware. It will be repeated with the tests of the new version of the FGCs LHC Beam Commissioning Meeting V. Kain & R. Alemany

12. RF Status LHC Beam Commissioning Meeting V. Kain & R. Alemany

13. May 2009 April 2009 RBAC: OP mode & Piquet roles Mastership, pre-pulses for BT&BI, rephasing in SPS W14 DR RF Power & LSA incorporation MKI2 W19 W23 RF (SM18) XPOC, BLM online chk, FBCT W20 W24 Next Dry Run Schedule W21 W17 DR Coll Coll W25 PT Starts W22 W26 July 2009 June 2009 *) Follow-up of all sorts of things: BCTs, BLM (new critical setting), fixed display clean-up *) new RF FGC version, real time radial modulation, update of RF power fixed display *) Virtual critical settings test *) LBDS beam 2 RF Beam Ctrl Coll IST W27 TI8 DR TI8 Test LHC Interleave Ext (SPS MD) W28 TI2 DR TI2 Test W29 LHC Interleave Ext (SPS MD) Post Mort RF, VMCS, LBDS W30 MKQA ACD Nom InjFeedBack W31 RBAC Strict

14. Next Dry Run Schedule • Week 29 • *) No RBAC strict next week -> postponed to 29th of July • *) Postmortem dry run next week: M. Zerlauth will be in charge. Any requests directly to him. They will try for the first time automatic analysis after PM event; sort event building for beam based stuff. • Week 30: • *) Follow-up of all sorts of things: BCTs, BLM (new critical setting), fixed display clean-up • *) new RF FGC version, real time radial modulation, update of RF power fixed display • *) Virtual critical settings test • *) LBDS beam 2 • Week 31: • *) Nominal injection sequence: pulse injection kickers,.... • *) Injection sequencing: set BI, set RF, IQC • *) Feedbacks LHC Beam Commissioning Meeting V. Kain & R. Alemany

15. Backup • AC Dipoles (HB1, VB1, HB2, VB2): used on hadrons machine to measure the beam dynamics parameters in the linear and non-linear regimes. • The advantages of AC dipoles against single fast kick are: • it forces long lasting betatron oscillations without emittance growth ( the AC dipole is ramped up and down adiabatically) • Thanks to this slow increase of the oscillation amplitude the machine protection should be easier to guarantee. • Increased signal to noise ration of the coherent forced oscillations versus the damped free oscillations due to filamentation. • Can provide a fast measurement of the machine aperture since one beam can be used several times for increasing oscillation amplitudes before the aperture is reached. Using single kicks requires a fresh beam for every different oscillation amplitude. • There is no beam filamentation LHC Beam Commissioning Meeting V. Kain & R. Alemany