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

2. 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

3. Xboxes Rep Rate 400Hz CPI 50MW 1.5us klystron Scandinova Modulator
Beam test capabilities
Xbox-1
Previous tests:
2013 TD24R05 (CTF2)
TD26CC-N1 (CTF2)
T24 (Dogleg)
Ongoing test:
Aug2015- TD26CC-N1 (Dogleg)
OPERATIONAL
Xbox-2
CPI 50MW 1.5us klystron
Scandinova Modulator
Rep Rate 50Hz
Previous tests:
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):
D-printed Ti waveguide
X-band RF valve
COMMISSIONING Spring 2016
Major increase in testing capacity!

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

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

6. 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

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

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

9. 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

10. 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

11. 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

12. 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

13. 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

14. 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

15. 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

16. 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

17. 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

18. 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

19. 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)

20. 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

21. 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

22. 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,

23. Thanks for your attention!