R. Corsini, CLIC Project Meeting October 24, 2012 CTF3 Experimental program for end 2012 R. Corsini for the CTF3 Team 1.

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Presentation transcript:

R. Corsini, CLIC Project Meeting October 24, 2012 CTF3 Experimental program for end 2012 R. Corsini for the CTF3 Team 1

R. Corsini, CLIC Project Meeting October 24, 2012 Drive beam quality Chicane & CT line (& DL): Comparisons of quad scan measurements in CT and CTS lines. Consolidate low R 56 optics. Repeat bunch length measurements, using DL. 1 week. CR: Precise measurement of transverse matching by quad scans. Closed orbit correction. Improve orbit closure (will profit by better understanding of BPI response). 1-2 weeks. TL2, CLEX beam lines: optics studies (kick studies, quad scans & rematching). 1 week. Set-up of combination factor 8 (2 TWTs). 1-2 weeks. First priority Total time4-6 weeks Target goals: control bunch length (to 1.5 mm rms in CLEX) Target emittance (150 um) in both planes for combination factor 4 (below 300 um for horizontal, factor 8) Total losses from linac to CLEX below 10% Factor 8 stability < rms Define & implement in control system nominal machine(s) (magnet strengths) for all beams

R. Corsini, CLIC Project Meeting October 24, 2012 CTF3 beams Types of CTF3 beams: 1.5 GHz“straight” 4 A, bypassing DL & ringdestinations: TBL, TBTS factor 416 A, bypassing DLdestinations: TBL, TBTS factor 8~ 26 A peak destinations: TBL, TBTS 3 GHz“straight” 4 A, bypassing DL & ringdestinations: TBL, TBTS factor 416 A, bypassing DLdestinations: TBL, TBTS + “study” beams, e.g., short pulse, low current… + different “standard” optics (e.g., chicane R56 = 0., 0.2, 0.45)

R. Corsini, CLIC Project Meeting October 24, 2012 TBTS Structures conditioning: careful conditioning, take BD rate measurement and collect flash-box signals in parallel. Standard operation with factor Hz. Mainly during night and week-ends, at least for the next month. Wake-field monitor tests. Both without drive beam and with. 2-3 weeks total. High priority. PETS on/off, measure break-down rates in different conditions (recirculation high-power, nominal on, nominal off). Mainly in parallel with normal operation, low priority. RF pulse shaping tests. Next run (from mid-January).

R. Corsini, CLIC Project Meeting October 24, 2012 TBL RF power production: PETS tanks, from 20 A to 30 A, deceleration in the 30%-50% range. High priority, 1-2 weeks. Dispersion free steering, optics studies – also extend to high current/large deceleration. Reduced resources at present. Mid priority, possibly postponed to next year. Possibly, a new PETS prototype for TBL+ to be tested before the end of the year (input coupler, mini-tank, PETS On/Off). Postponed to next year. Drive Beam feed-forward and feedback (CTF3-002) Test of drive beam phase monitors. High priority, < 1 week.

R. Corsini, CLIC Project Meeting October 24, 2012 Timeline & Organization First phase, next 3-4 weeks, focused on drive beam quality studies. Mainly 3 GHz beam. MDs from Monday to Thursday afternoon, then TBTS or TBL operation. Includes drive beam phase monitor commissioning and wake-field monitor tests with probe beam only. Second phase, following 2-3 weeks, mixed. Two days per week (+ nights and week-ends) for TBL and TBTS. First priority on TBL high current and factor 8 drive beam. Expect to condition TBTS structures up to nominal. Third phase, final 1-3 weeks, completion of planned studies. First priority on wake-field monitor studies with drive beam and any other high priority item still to be completed.

R. Corsini, CLIC Project Meeting October 24, 2012 Outlook to 2013 S. Doebert, S. Curt

R. Corsini, CLIC Project Meeting October 24, 2012 Outlook to 2013 Short winter shutdown: stop the machine on December 14th and restart operation with beam on January 21, 7 weeks before LHC stop. During the short winter shutdown some new equipment will be installed and most of the cabling work will be done. The longer maintenance of the RF system will be done in a second shutdown starting end of April. This stop will take 3 month. CTF3 would restart in August and run until the end of the year. The May-August shutdown may shift later depending on running conditions, advancement of other activities and readiness of new hardware. The dog-leg installation should be completed during May-June, and the beam-loading experiment may start as soon as klystrons 2 to 7 are available. PHIN run also possible in summer, in the shadow of modulator-klystron maintenance of the 2 nd half of the CTF3 linac.

R. Corsini, CLIC Project Meeting October 24, 2012 S. Curt