Dry Run Summary Week 26: MKQA & AC Dipole Week 27: RF D. Jacquet, M. Gruwe, L. Ponce, E. Veyrunes, xxx, V. Kain, R. Alemany 07.07.2009 1 LHC Beam Commissioning Meeting V. Kain & R. Alemany https://espace.cern.ch/mddb/ Systems%20Dry%20Run%20Tests/ Home.aspx
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. Week 26: MKQA & AC dipoles. B2 H. B2 V. Week 27: RF Beam Control. RF POWER - PowerPoint PPT Presentation
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
LHC Beam Commissioning Meeting V. Kain & R. Alemany
1
Dry Run Summary
Week 26: MKQA & AC DipoleWeek 27: RF
D. Jacquet, M. Gruwe, L. Ponce, E. Veyrunes, xxx, V. Kain, R. Alemany
LHC Beam Commissioning Meeting V. Kain & R. Alemany
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
07.07.2009
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.
07.07.2009
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.
07.07.2009
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
07.07.2009
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.
07.07.2009
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
07.07.2009
LHC Beam Commissioning Meeting V. Kain & R. Alemany
12
RF Status
07.07.2009
April 2009Mond
ayTuesday
Wednesday
Thursday
Friday
Saturday
Sunday
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30
W17 DR
W14 DR
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
1CERN HOLID
2 3
4 5 6 7 8 9 10
11 12 13 14 15
16 17
18TT40/TT60
19 20 21CERN HOLID
22 23 24
25DSO
26 27 28 29DSO
30LASS TEST
31
May 2009
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
1CERN HOLID
2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30
June 2009Mond
ayTuesday
Wednesday
Thursday
Friday
Saturday
Sunday
29 30 1 2 3 4 5
6 7 8 9 10 11 12
3 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31
July 2009
LHC Interleave Ext
(SPS MD)
TI8 Test
TI2 Test
RF (SM18)XPOC, BLM online chk, FBCT
PT Starts
W19
W20
W21
W22
W23
W24
W25
W26
W27
W28
W29
W30
W31
Coll Coll
Coll IST
RF Beam Ctrl
MKQA ACD
Post Mort
Nom Inj FeedBack
TI8 DR
TI2 DR
MKI2
RF, VMCS, LBDS
RBAC Strict
LHC Interleave Ext
(SPS MD)
Mastership, pre-pulses for BT&BI, rephasing in SPS
RBAC: OP mode & Piquet roles
RF Power & LSA incorporation
Next Dry Run Schedule*) 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
LHC Beam Commissioning Meeting V. Kain & R. Alemany
1407.07.2009
• 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
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:
1. it forces long lasting betatron oscillations without emittance growth ( the AC dipole is ramped up and down adiabatically)
2. Thanks to this slow increase of the oscillation amplitude the machine protection should be easier to guarantee.
3. Increased signal to noise ration of the coherent forced oscillations versus the damped free oscillations due to filamentation.
4. 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.