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Collimator Wakefield Measurements

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.

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Collimator Wakefield Measurements

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  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 1

  2. Beam Parameters at SLAC ESA and ILC

  3. In this case, it lays in the long bunch regime • Formulae based on work of Gennady Stupakov, SLAC.

  4. CLIC Facility, CALIFES CALIFES linac inside CLEX room at CERN Initial simulation of bunch deflection at CALIFES • Further results needed to confirm simulations • Worth emphasing that it is not yet clear when CALIFES will be available to make such measurements Beam parameters Ref W. Farabolini, Proc. Linac 2010, Tsukuba, Japan

  5. Collimator Hardware T480 “wakefield box” ESA beamline

  6. ESA Wakefield measurements T480 “wakefield box” a = 166 mrad r = 1.4 mm Col. 12 Designed, modelled and tested collimators at SLAC ESA facility ESA beamline T480 2007 data E.M. predictions GdfidL vs. ECHO (ESA collims. 1- 8) Angular kick (V/pC) Kick factor (V/pC/mm) Collimator y (mm) Wakefields, survivability. Strong collaboration between SLAC and EUROTeV groups. Nigel Watson, 21 Oct 2010

  7. Summary, ESA T480 wakefield measurements Nigel Watson, 21 Oct 2010

  8. 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)

  9. 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.

  10. Parameters required for Beam Tests To the presenter at the ESTB 2011 Workshop: please, fill in the table (at best) with the important parameters needed for your tests

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