Status of CTF 3 Commissioning Operation R Corsini

Status of CTF 3 Commissioning & Operation R. Corsini - CTF 3 Committee 18 Sept 2008 Schedule PETS in TBTS CALIFES

Status of CTF 3 Commissioning & Operation R. Corsini - CTF 3 Committee 18 Sept 2008 Goals & milestones 2008 run • 1 st run (April - June) • Injector & Linac: establish stable & documented working point, automatic beam steering & steering algorithm studies, diagnostics consolidation, stability studies, EUROTe. V BPMs • Delay Loop: complete beam optics measurements (dispersion, orbit, kick measurements, matching), re-establish combination • TL 1 & combiner ring: complete optics studies (dispersion, closed orbit correction, matching, tunes, kick measurements, quad displacement evaluation, matching), tune and b function dependence of vertical instability, factor four combination with DL bypass (≥ 10 A) • DL, TL 1 & CR: factor 8 combination (≥ 15 A) • 2 nd run (July - September) • Complete DL + CR, new RF deflectors (20 A ? ) • TL 2 commissioning • First CALIFES commissioning • TBTS commissioning (no PETS) • 3 rd run (September - December) • Complete above program • Coherent Diffraction Radiation tests • TBTS, PETS running in

Status of CTF 3 Commissioning & Operation R. Corsini - CTF 3 Committee 18 Sept 2008 Goals & milestones 2008 run • 1 st run (April - June) • Injector & Linac: establish stable & documented working point, automatic beam steering & steering algorithm studies, diagnostics consolidation, stability studies, EUROTe. V BPMs • Delay Loop: complete beam optics measurements (dispersion, orbit, kick measurements, matching), re-establish combination • TL 1 & combiner ring: complete optics studies (dispersion, closed orbit correction, matching, tunes, kick measurements, quad displacement evaluation), tune and b function dependence of vertical instability, factor four combination with DL bypass (≥ 10 A) • DL, TL 1 & CR: factor 8 combination (≥ 15 A) • 2 nd run (July - September) • New RF deflectors, Complete DL + CR (20 A ? ) • TL 2 commissioning • First CALIFES commissioning • TBTS commissioning (no PETS) • 3 rd run (September October - December) • Complete above program • Coherent Diffraction Radiation tests • TBTS, PETS running in

Status of CTF 3 Commissioning & Operation R. Corsini - CTF 3 Committee 18 Sept 2008 Fast vertical beam instability in CTF 3 solved by new deflectors with strong damping of the vertical deflecting mode and larger hor. /vert. detuning Old RF deflectors Beam current Vert Hor New RF deflectors (INFN-Frascati) Bukit in Aluminium – very fast conditioning to nominal power (1 day)

Status of CTF 3 Commissioning & Operation Beam current R. Corsini - CTF 3 Committee 18 Sept 2008 Without the losses from the fast vertical beam instability (plus improved optics control and tuning tools) it is now possible to circulate the 3 A beam with very small losses for hundreds of turns. 20 ms – 70 turns Bunch re-combination of a 3 A beam with factor four current increase had been demonstrated – 12 A reached. (DL still by-passed, and limited by RF pulse length) Beam current 12 A

Status of CTF 3 Commissioning & Operation R. Corsini - CTF 3 Committee 18 Sept 2008 Ring closed orbit correction Now operational Beam profile, emittance, Twiss parameters, matching routinely used my [2 p] MTV locations 3, 86 3, 84 3, 82 3, 8 CR vertical phase advance Tune measurements FFT of BPM signals at injection 3, 78 3, 76 3, 74 3, 72 21, 44 measured Now good model agreement 21, 94 22, 44 22, 94 23, 44 Current in quadrupole CR. QDG 0560 [A]

Status of CTF 3 Commissioning & Operation R. Corsini - CTF 3 Committee 18 Sept 2008 Dispersion free steering First tests in CTF 3 linac promising Will extend to rest of machine Important benchmark for CLIC correction algorithms Kick measurements Had been fundamental to debug hardware & model Still some small differences Dispersion measurements By magnet scaling Overall agreement with small residual Other methods to be developed

Status of CTF 3 Commissioning & Operation R. Corsini - CTF 3 Committee 18 Sept 2008 Beam reached the end of the CLEX drive beam line – including PETS drive beam probe beam Potential to reach nominal power soon (inside PETS) by recirculation 01 August 2008

Status of CTF 3 Commissioning & Operation R. Corsini - CTF 3 Committee 18 Sept 2008 2 BPMs – no signal PETS Some H & V mixing

Status of CTF 3 Commissioning & Operation R. Corsini - CTF 3 Committee 18 Sept 2008

Status of CTF 3 Commissioning & Operation R. Corsini - CTF 3 Committee 18 Sept 2008

Status of CTF 3 Commissioning & Operation Outlook – restart operation in 2009 R. Corsini - CTF 3 Committee 18 Sept 2008