R.M. Jones (University of Manchester/Cockcroft Inst.) on behalf of CLIC Collaboration., ESTB Workshop, SLAC, 17 th March 2011 1 Collimator Wakefield Measurements R.M. Jones, D. Schulte, R. Tomas, W. Wuensch for the CLIC team Thanks to J. Pfingster, A. Grudiev, A. Latina, G. Sterbini, D Angal-Kalinin, J. Barranco, L. Fernandez, C. Hast, S. Jamison, J. Resta, G. Rumolo, A. Seryi, N. Watson
Collimator Wakefield Measurements. R.M. Jones, D. Schulte, R. Tomas, W. Wuensch for the CLIC team Thanks to J. Pfingster, A. Grudiev, A. Latina, G. Sterbini, D Angal-Kalinin, J. Barranco, L. Fernandez, C. Hast, S. Jamison, J. Resta, G. Rumolo, A. Seryi, N. Watson. 1. - PowerPoint PPT Presentation
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R.M. Jones (University of Manchester/Cockcroft Inst.) on behalf of CLIC Collaboration., ESTB Workshop, SLAC, 17th March 20111
Collimator Wakefield Measurements
R.M. Jones, D. Schulte, R. Tomas, W. Wuensch for the CLIC teamThanks to
J. Pfingster, A. Grudiev, A. Latina, G. Sterbini, D Angal-Kalinin, J. Barranco, L. Fernandez, C. Hast, S. Jamison, J. Resta, G. Rumolo, A.
Seryi, N. Watson
R.M. Jones (University of Manchester/Cockcroft Inst.) on behalf of CLIC Collaboration., ESTB Workshop, SLAC, 17th March 20112
R.M. Jones (University of Manchester/Cockcroft Inst.) on behalf of CLIC Collaboration., ESTB Workshop, SLAC, 17th March 2011
Beam Parameters at SLAC ESA and ILCParameter SLAC ESA ILC-500Repetition Rate 10 Hz 5 HzEnergy 28.5 GeV 250 GeVBunch Charge 2.0 x 1010 2.0 x 1010
Bunch Length 300 mm 300 mmEnergy Spread 0.2% 0.1%Bunches per train 1 (2*) 2820Microbunch spacing
- (20-400ns*) 337 ns
R.M. Jones (University of Manchester/Cockcroft Inst.) on behalf of CLIC Collaboration., ESTB Workshop, SLAC, 17th March 20114
In this case, it lays in the long bunch regime Formulae based on work of Gennady Stupakov, SLAC.
R.M. Jones (University of Manchester/Cockcroft Inst.) on behalf of CLIC Collaboration., ESTB Workshop, SLAC, 17th March 20115
Ref W. Farabolini, Proc. Linac 2010, Tsukuba, Japan
CLIC Facility, CALIFES
CALIFES linac inside CLEX room at CERN
Beam parameters
Further results needed to confirm simulations
Worth emphasing that it is not yet clear when CALIFES will be available to make such measurements
Initial simulation of bunch deflection at CALIFES
R.M. Jones (University of Manchester/Cockcroft Inst.) on behalf of CLIC Collaboration., ESTB Workshop, SLAC, 17th March 20116
R.M. Jones (University of Manchester/Cockcroft Inst.) on behalf of CLIC Collaboration., ESTB Workshop, SLAC, 17th March 20117
T480“wakefield box”
ESA beamline
Collimator Hardware
R.M. Jones (University of Manchester/Cockcroft Inst.) on behalf of CLIC Collaboration., ESTB Workshop, SLAC, 17th March 2011Nigel Watson, 21 Oct 2010
ESA Wakefield measurements
Col. 12 a = 166 mradr = 1.4 mm
Ang
ular
kic
k (V
/pC
)
Collimator y (mm)
T4802007 data
Kic
k fa
ctor
(V/p
C/m
m)
E.M. predictionsGdfidL vs. ECHO(ESA collims. 1- 8)
Wakefields, survivability. Strong collaboration between SLAC and EUROTeV groups.
T480“wakefield box”
ESA beamline
Designed, modelled and tested collimators at SLAC ESA facility
R.M. Jones (University of Manchester/Cockcroft Inst.) on behalf of CLIC Collaboration., ESTB Workshop, SLAC, 17th March 2011Nigel Watson, 21 Oct 2010
0
1
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3
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5
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8
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Collimator number
Kick
fact
or [V
/pC/
mm
]
Experimental dataGdfidL 500 micronsGdfidL 1 mm
Summary, ESA T480 wakefield measurements
R.M. Jones (University of Manchester/Cockcroft Inst.) on behalf of CLIC Collaboration., ESTB Workshop, SLAC, 17th March 2011
Hardware Set-Up For ESTB
• At Least 25 of drift space between collimator and last BPM
• Collimators, support and sandwich already at SLAC• Collimators borrowed from STFC• Bunch length measurement is critical –Steve
Jamison (ASTeC/STFC) proposes electro-optic measurement (synergy with CLIC TDR)
• BPM resolution, hopefully in the 100 nm level (could be partially contributed by CERN)
R.M. Jones (University of Manchester/Cockcroft Inst.) on behalf of CLIC Collaboration., ESTB Workshop, SLAC, 17th March 201111
R.M. Jones (University of Manchester/Cockcroft Inst.) on behalf of CLIC Collaboration., ESTB Workshop, SLAC, 17th March 201112
People
• J. Barranco, L Fernandez, S. Jamison, J. Resta, G. Rumolo, H. Day (Univ of Manchester PhD student measuring LHC wakes), tbc (postdoc, Univ of Manchester), R.M. Jones, D. Shulte, A. Seryi
• Due to time constraints Univ. Birmingham (UK) will not take part.
• As in ESA, strong collaboration with one SLAC colleague will be important.
R.M. Jones (University of Manchester/Cockcroft Inst.) on behalf of CLIC Collaboration., ESTB Workshop, SLAC, 17th March 201113
R.M. Jones (University of Manchester/Cockcroft Inst.) on behalf of CLIC Collaboration., ESTB Workshop, SLAC, 17th March 2011
Logistics RequirementsSpace requirements (H x W x L) Existing wakefield box (already at SLAC)Duration of Test and Shift Utilization Previous experience indicates 2 weeks.
Desired Calendar Dates Winter/Fall 2011/2012
To the presenter at the ESTB 2011 Workshop: please, fill in the table (at best) with the important parameters needed for your tests