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Status of CTF3 Operation, update of experimental program and schedule for 2011

This update provides an overview of the status of CTF3 operations, including highlights, problems, and the schedule for 2011. It covers beam preparation, TBTS results, breakdown rate measurements, TBL results, CLEX installations, and plans for the rest of the year.

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Status of CTF3 Operation, update of experimental program and schedule for 2011

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  1. Status of CTF3 Operation, update of experimental program and schedule for 2011 • Highlights and problems • Installation period in September • Program for the rest of the year CLIC Project Meeting 2.9.2011 Steffen Doebert BE/RF

  2. Drive Beam preparation • Made use of excellent factor 4 beam, 3 GHz, up to 14 A in CLEX • Bunch length measurements in CR and CLEX with consistent results as well compared to rf measurements • Ring optics studies in delay loop and combiner ring • Frequent over night operation with some success • 1,5 GHz factor 8 set up with 1.5 TWT’s, 19 A used in CLEX but clearly needs improvement. Got third TWT back but broke again after a few days

  3. Drive Beam preparation 1.5 GHz factor 8 combination

  4. Drive Beam preparation 1.5 GHz factor 8 combination problems, Response of phase switches to be investigated further

  5. TBTS results • Up to 150 MV/m two beam acceleration measured • Consistency with power calibrations and acceleration • Breakdown rate measurements established • Breakdown kick measurements just started, some events to be analyzed using the screen at the end of the line (~0.2 mrad), BPM’s suffer from DB noise • FLASH box installed

  6. TBTS results Two beam acceleration results Ben, Tobias

  7. TBTS results Example of a two beam acceleration measurement(probe beam at 2 Hz and drive beam at 1 Hz) Wilfrid Farabolini

  8. TBTS results Latest breakdown rate results Alexey Dubrovskiy

  9. TBTS results Breakdown statistics, Alexey Equivalent to 10 hours klystron processing at 60 Hz

  10. Comparison with T24_KEK Mostly the ACC related BD’s. 2.4BD/hr ~ 6.4 x 10^-5 bpp/m T. Higo

  11. TBL results • Deceleration measurements at 14 A and 19 A with nicely consistent results • BPM resolution measurements, visit from Juanjo (IFIC) and Gabriel (UPC) • Beam stability measurements • Big effort on beam based alignment studies (~ 700 mm rms achieved ) • All 4 PETS produce power according to expectations up to 60 MW

  12. TBL results Deceleration with 18 A, segmented dump measurement Maja Olvegaard

  13. TBL results Factor 8 combination ~ 18 A, form factor 0.85, 10% power calibration error

  14. TBL results Have to assume 119 MeV initial energy, 117.5 measured  1% error Form factor for predictions with current F=0.8 used To make the prediction from power fit, need to assume 10% calibration error Pretty good agreement !

  15. TBL results BPS resolution study together with Junajo (IFIC) and Gabriel (UPC) Vertical resolution, 13 A, BPS0510, 8.7 mm (goal is 5 mm)

  16. CLEX installationsSeptember Jose Monteiro Installation of 4 -5 more PETS tanks in TBL and PETS ON/OFF in TBTS

  17. Program towards the rest of the year • PHIN run • Terra experiment • Improve 1.5 GHz factor 8 beam • TBL deceleration with 8 PETS for CDR • Beam stability measurements at 3 GHz and 1.5 GHz • Emittance and bunch length control • Breakdown kick measurements • Beam loading compensation for main beam

  18. Conclusion • Pretty good progress • 1.5 GHz will need more time to be optimized (TWT availability is very critical) • Installations in September planned • Intense run period October-December to get final results for CDR

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