N. Catalan Lasheras on behalf of a very large team Xboxes and structures N. Catalan Lasheras on behalf of a very large team

Structures under manufacturing Outlook Xboxes Xbox3: installation status. Xbox2: shielding problems. Running the T24_SLAC Xbox1 dog-leg experiment latest results Structures under manufacturing At CERN External collaborations Testing schedule

Xboxes Rep Rate 400Hz CPI 50MW 1.5us klystron Scandinova Modulator Beam test capabilities Xbox-1 Previous tests: 2013 TD24R05 (CTF2) 2013 TD26CC-N1 (CTF2) 2014-15 T24 (Dogleg) Ongoing test: Aug2015- TD26CC-N1 (Dogleg) OPERATIONAL Xbox-2 CPI 50MW 1.5us klystron Scandinova Modulator Rep Rate 50Hz Previous tests: 2014-15 CLIC Crab Cavity Ongoing test: Sep2015- T24OPEN OPERATIONAL Xbox-3 4x Toshiba 6MW 5us klystron 4x Scandinova Modulators Rep Rate 400Hz Medium power tests (Xbox-3A): 2015 3D-printed Ti waveguide 2015 X-band RF valve COMMISSIONING Spring 2016 Major increase in testing capacity!

Xbox3. RF network installed and under vacuum Pulse compressors delayed. Installation during summer

Xbox3. LLRF and diagnostics Low level RF ready and under installation. New Solid State Amplifier 400 W AM61-12S-60-56-PR SN001 arrived and successfully tested. Signal and RF Cabling ongoing

Xbox2. Roof shielding limitation 6 mm lead doors installed on the central part of the roof 20% reduction on radiation level 20-30 cm of concrete to shield the current radiation 60 cm concrete slabs under construction by SMB RF cables’ installation on hold 1st March 7th March In the bunker (left scale) On the roof (right scale) -20% shield

Xbox2. Conditioning at reduced power Run without pulse compressor 200 ns 155 ns 100 ns

Xbox2. Working at lower power Using Pulse Compressor Using directly Klystron Output power Question: Breakdown Rate dependence on Pulse shape? No conclusive results yet

Xbox2. Beam loss monitors and radiation M. Kastriotou After Xbox1, smaller optical fibre beam loss monitors installed in Xbox2 Detection of dark current and breakdowns under study Energy scan

Xbox1. Beam loading experiment on TD26CC_1 75 MV/m Loaded 100 MV/m Unloaded 66 MV/m Anti-Loaded 68 MV/m 4th March 22nd March 11th April

Xbox1. Beam loading Results • Average Gradient o Peak Gradient Both Breakdown Rate measurements and breakdown positioning analysis show that performance of the structure is limited by the peak gradient rather than the average. CLIC Experimental Verification Meeting

Structures status Ready to be tested Under manufacturing TD24_R05_SiC_1 TD24_R05_3 TD26_CC_2 (repaired) TD26_CC_3 TD25_R3_1 PSI_1 (kink) TD24_R05_SiC_2 T24_4/5 TD26_R1_1/2/3/4 T24_PSI T24_Half SLAC_2 TD26_CIEMAT

TD26_CC_3 ready for test Tuned last Friday! Stored under Nitrogen First structure to be bonded in the small oven next to the clean area 14 hours natural cool down may have caused bending of 30 mm Tuned last Friday! Stored under Nitrogen

TD24_R05_SiC_2 Bonding and geometrical control + data in excel format; + easy to analyze data; only time interval; Perpendicularity compensation. Metrological control done. Ready to go back for assembly

T24_4/5 inspection at the company Two units launched in 2015 New surface measurements capability Two disks rejected from the second structure. First structure will be at CERN next week for inspection Market survey for assembly to follow Input ring cell Matching iris A Disk 2 Disk 1 Disk 3 Disk 4 Disk 5 Disk -6 Disk 10 Disk 11 Disk 12 Disk 13 Disk 15 Disk 16 Disk 17 Disk 18 Disk 19 Disk 20 Disk 21 Disk 23 Disk 25 Output ring cell Disk 7 Disk 8 Disk 9 Disk 14 Disk 22 Disk 24 Disk 26

New prototype design TD26_R1_CC Modification TD26 CC R0.5 1 R1 mm R0.5 mm 2 Cell geometry given by the equation Ellipse 3 Ø80 mm  Ø83 mm (see next slide) Ø74 mm 4 70 mm waveguides 64 mm waveguides 5 Sharp edge R0.02 mm 6 Short name Drawing name 2 4 5 3 ??? 6 2 1

TD26_R1_CC mechanical design SWAGELOK FITTING Ø80 mm Ø83 mm Problem region 1. Assembly of CC waveguide 2. Machining of interfaces 3. Brazing of IUWR90 flange 4. Bonding 5. Brazing of vacuum tube, flange and tuning studs 6. Brazing of CC waveguides to the disc stack 7. Brazing of cooling circuits with brazing shims to the disc stack In one step

TD26_R1_CC. Status Four units to be ready by 2017 COOLING BLOCK SWAGELOK DISC STACK VACUUM FLANGE IUWR90 FLANGE COMPACT COUPLER WG Four units to be ready by 2017 Technical specifications ready Procurement of disks waiting for final drawing approval

Structures done outside CERN TD26 Structure under procurement in CIEMAT (ES) Structures made from halves under manufacture at SLAC (US) T24 structure using brazing being procured at PSI (CH)

Putting it altogether. Testing planning. Xbox1 not available after 2016 Development of power splitter to double the capacity in Xbox2 Component tests may be necessary Trans-national access will add to the picture

Conclusions Xboxes. Structure production Xbox3 installation on-going. All parts at CERN Waiting for roof shielding and cabling campaign, Debugging and testing of the electronics going on First commissioning in May/June without pulse compressors, Operation in summer Xbox2 on hold for roof shielding Xbox1 running fine with some hardware effort due to the large power Structure production peaking up in preparation of increasing number of slots Large contribution from outside partners

Credits Xbox team. Structures team T. Argyropoulos, H. Damerau, D. Esperante, J. Giner Navarro, G. Mcmonagle, S. Rey, I. Syratchev, B. Woolley. Structures team S. Atieh, P. Guyard, A. Grudiev, S. Lebet, F. Motchmann, A. Olyunin, L. Pazdera, E. Rodriguez Castro, P. Sobrino Mompean, A. Solodko, M. Taborelli, M. Thiebert, R. Wegner, O. Brunner, S. Curt, C. Eymin, A. Mongelluzzo, C. Nicou, E. Rigutto, J. Tagg, W. Wuensch,

Thanks for your attention!