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R. Corsini – CLIC Project Meeting CTF3 Update

CTF3 UpdateR. Corsini for the CTF3 Team

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R. Corsini – CLIC Project Meeting CTF3 Update

Conclusions

• 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!

From December 2013

Project Meeting

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R. Corsini – CLIC Project Meeting CTF3 Update

• 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!

Status of last year issues

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R. Corsini – CLIC Project Meeting CTF3 Update

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 linac19 Feb first CALIFES beam21 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 CR27 Feb first beam in CLEX (uncombined)

4 Mar first beam (3 GHz) to – and through – DL5 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 A25 Mar good factor 8, ~ 25 A ~1% stability

9 Apr transport to TBTS, > 20 A

Run 1 – summary until now

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R. Corsini – CLIC Project Meeting CTF3 Update

Status – 26 A in CR (factor 8)

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R. Corsini – CLIC Project Meeting CTF3 Update

Status – 26 A in CR (factor 8)

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R. Corsini – CLIC Project Meeting CTF3 Update

Status ~ 23 A through TBTS

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R. Corsini – CLIC Project Meeting CTF3 Update

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)• TWTs feeback (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…

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R. Corsini – CLIC Project Meeting CTF3 Update

energy flattening feedback (MKS15)

BPR 475 flattening feedback

Trips MKS02 & MKS 15

Disable MKS15 loading fb and inj. fb

Stop energy flattening and BPR 475

D. Gamba

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R. Corsini – CLIC Project Meeting CTF3 Update

Emittance & optics – TL2• Still large Hor emittance• Vert emittance small • Suspect error in MTV 253 scan

(calibration?)• Stable Twiss parameters &

optics in TL2

P. Skowronski, T. Persson

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R. Corsini – CLIC Project Meeting CTF3 Update

Stripline Drive Beam BPM in TBL (CERN-LAPP)

Cavity Main Beam BPM in CALIFES/TBTS (CERN-JAI at Royal Holloway)

Electro-optic bunch profile monitor in CALIFES(CERN-Dundee University)

2013 GoalsR. Pan, T. Lefebre

F. Cullinan, J. Towner,W. Farabolini, M. Wendt…

CTF3 as diagnostics test bed

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R. Corsini – CLIC Project Meeting CTF3 Update CALIFES

F. Burkart, O. Stein, W. Farabolini

Diamond beam loss detectors

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R. Corsini – CLIC Project Meeting CTF3 Update CALIFES - bunch length compression

• CALIFES bunch length measured with streak camera, between 3 and 6 ps rms

W. Farabolini, T. Lefebe, S. Mazzoni

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R. Corsini – CLIC Project Meeting CTF3 Update

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

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R. Corsini – CLIC Project Meeting CTF3 Update

TBTS – multipolar componentsW. Farabolini

Unfocused beamthrough structure,No RF

Zero crossing,Positive slope

Zero crossing,Negative slope

Positive crest

Negative crest

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R. Corsini – CLIC Project Meeting CTF3 Update

first beam from gun beam in linacbeam in CALIFES

16 A in CR – factor 4

7 A in DL factor 2

25 A in CR factor 8

Today

23 A in CLEXfactor 8

CTF3 Schedule 2014

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R. Corsini – CLIC Project Meeting CTF3 Update CTF3 Schedule 2014

Installation TBM / Maintenance klystrons

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R. Corsini – CLIC Project Meeting CTF3 Update TBM Installation

D. Gudkov, G. Riddone, H. Mainaud …