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CTF3 Update R. Corsini for the CTF3 Team

CTF3 Update R. Corsini for the CTF3 Team. 1. Conclusions. From December 2013 Project Meeting. 2 nd run of 2013 not very lucky : Problem with CALIFES cathode plug-in TWTs availability (from 2 ½ to 2, to 1…) – hope to be solved

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CTF3 Update R. Corsini for the CTF3 Team

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  1. CTF3 UpdateR. Corsini for the CTF3 Team 1

  2. Conclusions From December 2013 Project Meeting • 2nd run of 2013 not very lucky: • Problem with CALIFES cathode plug-in • TWTs availability (from 2 ½ to 2, to 1…) – hope to be solved • Delays in hardware components (in dogleg and feed-forward exp.) • Some issues on klystron availability, operation manpower, infrastructure) • However, good progresses in stability, repeatability, operational software, optics & procedures (not covered here)… • Future schedule agreed upon, hardware problems on the way to be solved - will restart fast after the short Christmas break, all ready for an exciting 2014!

  3. Status of last year issues • CALIFES: Fast successful repair, during winter short shut-down • TWTs: 1 New one, from new supplier, 2 repaired. Now we have 3 fully operational + one spare. Ordering a second one from Poland. All 3 are working stably since January. • Dogleg experiment: all hardware installed – start scheduled in summer • Feed-forward experiment: amplifiers expected for Easter, all other hardware ready (will also receive two new phase monitors during 2014 – can start with present one only, and monitor phase in PETSs) • Klystron availability: very good progress • Operation manpower – still a bottleneck, but… • An exciting 2014 has started!

  4. Run 1 – summary until now 30 Jan first beam from gun 17 Feb first beam in spectrometer 10 (3 GHz) 18 Feb first 3 GHz beam in CR, first 1.5 GHz beam in linac 19 Feb first CALIFES beam 21 Feb first 1.5 GHz beam to CR 24 Feb first combination 4 beam (1.5 GHz with phase switches) 26 Feb 14 A (factor 4) extracted from CR 27 Feb first beam in CLEX (uncombined) 4 Mar first beam (3 GHz) to – and through – DL 5 Mar full combination factor 2 in DL (7 A) 13 Mar beam (uncombined) end of TBL / 3 GHz factor 4 optimized, 16 A 19 Mar first drive beam to TBTS for Uppsala beam tests (factors 1 to 4) 21 Mar first factor 8 recombination ~ 20 A 25 Mar good factor 8, ~ 25 A ~1% stability 9 Apr transport to TBTS, > 20 A

  5. Status – 26 A in CR (factor 8)

  6. Status – 26 A in CR (factor 8)

  7. Status ~ 23 A through TBTS

  8. Stability – Feedbacks • Gun current feedback (plus flattening on request) • RF compression system temperature (local + global) • Local RF phase feedback on each klystron • Injector feedback (MKS 2 and 3) • RF amplitude flattening feedback • Beam loading feed-back (MKS 5 to 15) • TWTsfeeback (extension of injector feedback) • Energy feedback + energy flattening feedback (MKS15) • Flattening of BPR 475… A. Andersson, A. Dubrowski, T. Persson, P. Skowronski, L. Malina, D. Gamba…

  9. Trips MKS02 & MKS 15 D. Gamba Stop energy flattening and BPR 475 BPR 475 flattening feedback Disable MKS15 loading fb and inj. fb energy flattening feedback (MKS15)

  10. Emittance & optics – TL2 • Still large Horemittance • Vertemittance small • Suspect error in MTV 253 scan (calibration?) • Stable Twiss parameters & optics in TL2 P. Skowronski, T. Persson

  11. CTF3 as diagnostics test bed Electro-optic bunch profile monitor in CALIFES (CERN-Dundee University) Stripline Drive Beam BPM in TBL (CERN-LAPP) R. Pan, T. Lefebre 2013 Goals Cavity Main Beam BPM in CALIFES/TBTS (CERN-JAI at Royal Holloway) F. Cullinan, J. Towner, W. Farabolini, M. Wendt…

  12. CALIFES Diamond beam loss detectors F. Burkart, O. Stein, W. Farabolini

  13. CALIFES - bunch length compression • CALIFES bunch length measured with streak camera, between 3 and 6 psrms W. Farabolini, T. Lefebe, S. Mazzoni

  14. TBTS • 22-23 A through PETS (factor 8) • Up to 60 MW produced – halfway with On-Off mechanism • Yesterday: about 50 MW in structure, no breakdowns • Ongoing studies on DB deceleration, coupling etc… W. Farabolini, J.L. Navarro, N. Vitoratou, V. Ziemann, J. Oegren

  15. TBTS – multipolar components W. Farabolini Positive crest Zero crossing, Negative slope Unfocused beam through structure, No RF Zero crossing, Positive slope Negative crest

  16. CTF3 Schedule 2014 beam in linac first beam from gun beam in CALIFES 16 A in CR – factor 4 25 A in CR factor 8 7 A in DL factor 2 23 A in CLEX factor 8 Today

  17. CTF3 Schedule 2014 Installation TBM / Maintenance klystrons

  18. TBM Installation D. Gudkov, G. Riddone, H. Mainaud …

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