Studies with carbon coatings in the SPS - MD run, week 25

Studies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansStudies with carbon coatings in the SPS- MD run, week 25Christina Yin VallgrenTE-VSC30 June 2009SPSU-team (G.Arduini, F.Caspers, S. Calatroni, P. Chiggiato,K. Cornelis, B. Henrist, E. Mahner, E. Metral, G. Rumolo, E.Shaposhnikova, M. Taborelli, F. Zimmermann), P. Costa Pinto,E. BenedettoChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

Studies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand Futureplans1 Overview of SPS MD runs2 Overview of carbon coated liners inserted in SPS3 Overview of carbon coated magnets inserted in SPS4 Conclusions and Future plansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

SPS scrubbing runStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansMonday 15/6 (18:00) - Tuesday 16/6 (05:00) : 1-3batches with 48 bunchesTuesday 16/6 (19:00) - Wednesday 17/6 (10:00): 2-3batches with 72 bunchesThursday 17/6 (00:00) - Thursday 18/6 (08:30): 2-3batches with 72 bunches, with accelerationThe nominal LHC cycle of 21.6 s.Christina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

Liners used for E-cloud monitoringStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand Futureplans1 Stainless Steel (ref): SEMCLOUD1, channel 1-48, XSD12 a-C stripe (width: 40mm): SEMCLOUD1, channel 49-96,SDneg3 a-C on Zr (rough surface): SEMCLOUD2, channel 1-48,EcEx4 a-C (CNe13, been in SPS since last year): SEMCLOUD2,channel 49-96, XSD2All the tests were done in the magnets at a field of 1.2kGauss.The beam energy in the scrubbing run was 450 GeV/cChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

Carbon CoatingsStudies withcarboncoatings inthe SPS- MD run,week 25a-C stripe/CNe32 - width 40 mmChristina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

Carbon CoatingsStudies withcarboncoatings inthe SPS- MD run,week 25a-C/Zr: CNeZr run 10 Rough surface.a-C: CNe13, been in SPS since last year.Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

Results from FBCTStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

Results from the E-cloud monitorsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

Schematic drawing of the magnetsStudies withcarboncoatings inthe SPS- MD run,week 25Pressure reading before the MD run (Background pressure).The pressure between the two coated magnet is twice higherthan the one between the uncoated magnets.Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

Pressure reading - Before the scrubbing runStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

Pressure reading - Maximum of the pressuresStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

Pressure reading - Maximum of the pressuresStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSScrubbing Run: StStδ max = 2.25, higher than δ threshold = 1.3Normalized E-Cloud Current/FBCT started at -0.35, thesame as from the previous run.After 3 nights scrubbing, E-Cloud has been reduced bynearly 30%.Overview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSScrubbing Run: StStδ max = 2.25, higher than δ threshold = 1.3Normalized E-Cloud Current/FBCT started at -0.35, thesame as from the previous run.After 3 nights scrubbing, E-Cloud has been reduced bynearly 30%.Overview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSScrubbing Run: StStδ max = 2.25, higher than δ threshold = 1.3Normalized E-Cloud Current/FBCT started at -0.35, thesame as from the previous run.After 3 nights scrubbing, E-Cloud has been reduced bynearly 30%.Overview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSScrubbing Run: a-C stripδ max = 0.92, lower than δ threshold = 1.3IT WORKS! BUT, the width of 40mm is a bit too low.It gives 350 times lower E-Cloud compared to StSt.After 3 nights scrubbing, E-Cloud has been reduced bynearly a factor of 2.Overview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSScrubbing Run: a-C stripδ max = 0.92, lower than δ threshold = 1.3IT WORKS! BUT, the width of 40mm is a bit too low.It gives 350 times lower E-Cloud compared to StSt.After 3 nights scrubbing, E-Cloud has been reduced bynearly a factor of 2.Overview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSScrubbing Run: a-C stripδ max = 0.92, lower than δ threshold = 1.3IT WORKS! BUT, the width of 40mm is a bit too low.It gives 350 times lower E-Cloud compared to StSt.After 3 nights scrubbing, E-Cloud has been reduced bynearly a factor of 2.Overview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSScrubbing Run: a-C stripδ max = 0.92, lower than δ threshold = 1.3IT WORKS! BUT, the width of 40mm is a bit too low.It gives 350 times lower E-Cloud compared to StSt.After 3 nights scrubbing, E-Cloud has been reduced bynearly a factor of 2.Overview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSScrubbing Run: a-C on Zrδ max = 0.96, lower than δ threshold = 1.3It started at the same level as a-C strip.After 3 nights scrubbing, E-Cloud has been reduced bynearly a factor of 10.Overview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSScrubbing Run: a-C on Zrδ max = 0.96, lower than δ threshold = 1.3It started at the same level as a-C strip.After 3 nights scrubbing, E-Cloud has been reduced bynearly a factor of 10.Overview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSScrubbing Run: a-C on Zrδ max = 0.96, lower than δ threshold = 1.3It started at the same level as a-C strip.After 3 nights scrubbing, E-Cloud has been reduced bynearly a factor of 10.Overview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSScrubbing Run: a-C CNe13Initial δ max = 1.0Has been in the SPS since last year. It gives 4 times lowere-cloud from the start than the new carbon coatings.After 3 nights scrubbing, almost no E-Cloud effect can bedetected.Overview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSScrubbing Run: a-C CNe13Initial δ max = 1.0Has been in the SPS since last year. It gives 4 times lowere-cloud from the start than the new carbon coatings.After 3 nights scrubbing, almost no E-Cloud effect can bedetected.Overview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSScrubbing Run: a-C CNe13Initial δ max = 1.0Has been in the SPS since last year. It gives 4 times lowere-cloud from the start than the new carbon coatings.After 3 nights scrubbing, almost no E-Cloud effect can bedetected.Overview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansPressure reading in the magnetsBefore the injection of the beam, the background pressurebetween the coated magnets was 2 times higher than thepressure between uncoated magnets. ⇒ Due to the higheroutgassing in the carbon film and shorter pumping time.With acceleration, the pressure between the coatedmagnets became as high as the pressure between theuncoated magnets.The gauges for measuring the pressure between twocoated magnets are close to a quadrupole. ⇐ Highdegassing in the quadrupole? Not really comparable withthe gauge we took between the two uncoated magnets.Christina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansPressure reading in the magnetsBefore the injection of the beam, the background pressurebetween the coated magnets was 2 times higher than thepressure between uncoated magnets. ⇒ Due to the higheroutgassing in the carbon film and shorter pumping time.With acceleration, the pressure between the coatedmagnets became as high as the pressure between theuncoated magnets.The gauges for measuring the pressure between twocoated magnets are close to a quadrupole. ⇐ Highdegassing in the quadrupole? Not really comparable withthe gauge we took between the two uncoated magnets.Christina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ConclusionsStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansPressure reading in the magnetsBefore the injection of the beam, the background pressurebetween the coated magnets was 2 times higher than thepressure between uncoated magnets. ⇒ Due to the higheroutgassing in the carbon film and shorter pumping time.With acceleration, the pressure between the coatedmagnets became as high as the pressure between theuncoated magnets.The gauges for measuring the pressure between twocoated magnets are close to a quadrupole. ⇐ Highdegassing in the quadrupole? Not really comparable withthe gauge we took between the two uncoated magnets.Christina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

Studies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsOverview ofcarbon coatedliners insertedin SPSPlans for the next MD1 Read the pressure close to liners2 Find a gauge between two uncoated magnets close to aquadrupole.Overview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25

ThanksStudies withcarboncoatings inthe SPS- MD run,week 25Christina YinVallgrenTE-VSCOutlineOverview ofSPS MD runsThanks a lot for your attention!Questions???Overview ofcarbon coatedliners insertedin SPSOverview ofcarbon coatedmagnetsinserted inSPSConclusionsand FutureplansChristina Yin VallgrenTE-VSC Studies with carbon coatings in the SPS - MD run, week 25