1. CLIC Parameter Working Group Two Beam Module Design
G. Riddone –

2. Module Layout System integration Alignment tolerances
Longitudinal dimensions
Transverse dimensions
System integration
Alignment tolerances
Tunnel integration
Cost estimate
CPWG, /08

3. Layout
1st 12 GHz, 100 MV/m following change of parameters at the end of 2006 (January-April 2007)
Updated layout from mid of April 2007
standard module (from April 2007)
special modules: pairs of accelerating structures replaced by quadrupole (from June 2007)
CPWG, /08

4. Standard module layout – Jan 2007
CPWG, /08

5. Accelerating structures
A. Grudiev, ,
update
CPWG, /08

6. PETS
I. Syratchev,
CPWG, /08

7. Standard Module – Apr 2007
Values to be confirmed
CPWG, /08

8. Longitudinal dimensions and quantities
CPWG, /08

9. Drive beam quadrupole
C. Wyss,
CPWG, /08

10. Module layout – special #1 Single length quadrupole
Value to be confirmed
CPWG, /08

11. Module layout – special #2 Double length quadrupole
Value to be confirmed
CPWG, /08

12. Module layout – special #3 Triple length quadrupole
Value to be confirmed
CPWG, /08

13. Module layout – special #4 Full length quadrupole
Value to be confirmed
CPWG, /08

14. Longitudinal dimensions and quantities
Unit length [mm]
Number
CPWG, /08

15. Transverse dimensions inside quadrupoles
Values under verification and still to be confirmed
CPWG, /08

16. System integration Decision to work in parallel to input definition
Baseline approach:
Identification of the requirements for the main components (PETS, acc. structures,…) and systems (cooling, vacuum alignment, beam instrumentation, beam dynamics …)
“quasi-detailed study” for the main components: acc. structures, PETS
Space reservation for the main systems: alignment/supporting system, …
Detailed study of each system
CPWG, /08

17. System integration
Main boundary conditions (in addition input on accelerating structures and PETS)
PETS-accelerating structure inter-axis: 750 mm
Acc. structures: quadrants
Tank for PETS and tank for acc. structures
PETS and accelerating structures with separate vacuum
Separate PETS and accelerating structure girders
BPM attached to drive beam quadrupoles
Separate BPM and main beam quadrupoles
BPM attached to each accelerating structures
CPWG, /08

18. Space for alignment system
Standard module
Conf. Jan-Apr 2007
PETS on-off mechanism
DB Quad
PETS
waveguide
acc. structure
Space for alignment system
girder
cradle
Conf. Apr 2007
CPWG, /08

19. Alignment tolerances
Dedicated study in collaboration with D. Schulte and H. Mainaud-Durand
Alignment error identification:
Mechanical errors
Positioning errors
Tolerances for:
Pre-alignment: before pilot beam
Alignment: beam-based alignment
Main cases:
Accelerating structures (1) and PETS (4)
Main linac quadrupoles (2)
Main linac quadrupole BPM (3)
CPWG, /08

20. Definitions for the errors
Identification of the r.m.s value for each independent and random error “E”
The quadratic sum of all the individual errors (r.m.s) gives the r.m.s value of the process
The tolerance (maximum acceptable error) of the process is 3 times the r.m.s error of the process
CPWG, /08

21. Module layout with sensor position
CPWG, /08

22. Pre-alignment and beam based alignment process
CPWG, /08

23. Pre-alignment and beam based alignment process
CPWG, /08

24. Tolerance for accelerating structure
PRE-ALIGNMENT
Ref. 1
Inherent accuracy of reference
10 mm 1s
Ref. to cradle 2
Sensor accuracy and electronics (reading error, noise,..)
5 mm 3
Link sensor/cradle (supporting plates, interchangeability)
Cradle to girder 4
Link cradle/girder
Girder to AS 5a 5b
Link girder/acc. structure
Inherent precision of structure
TOTAL
Tolerance
14 mm
40 mm 3s
BEAM-BASED ALIGNMENT
6) relative position of structure and BPM reading mm s
CPWG, /08

25. Girders and cradles – Exemple CTF2
Sensor and wire
Cradle
Actuators
CPWG, /08

26. Schematic representation of the errors
CPWG, /08

27. Tolerance for main linac quadrupole
PRE-ALIGNMENT
Ref. 1
Inherent accuracy of reference
10 mm 1s
Ref. to cradle 2
Sensor accuracy and electronics (reading error, noise,..)
5 mm 3
Link sensor/cradle (supporting plates, interchangeability)
Cradle
to quad. 7a
Link cradle/quadrupole
Quad. 7b
Inherent precision of quadrupole
TOTAL
Tolerance
17 mm
50 mm 3s
CPWG, /08

28. Tolerance for quadrupole BPM
PRE-ALIGNMENT
Ref. 1
Inherent accuracy of reference
10 mm 1s
Ref. to cradle 2
Sensor accuracy and electronics (reading error, noise,..)
5 mm 3
Link sensor/cradle (supporting plates, interchangeability)
Cradle to BPM 8a
Link cradle/quadrupole BPM axis
BPM 8b
Inherent precision of quadrupole BPM axis
TOTAL
Tolerance
14 mm
40 mm 3s
BEAM-BASED ALIGNMENT:
8c) relative position of quadrupole and BPM reading mm 1s
CPWG, /08

29. Tolerance for PETS PRE-ALIGNMENT Ref. 1 Inherent accuracy of reference
10 mm 1s
Ref. to cradle 2
Sensor accuracy and electronics (reading error, noise,..)
20 mm 3
Link sensor/cradle (supporting plates, interchangeability)
5 mm
Cradle to girder 4
Link cradle/girder
Girder to PETS 5a 5b
Link girder/PETS
Inherent precision of PETS
TOTAL
Tolerance
31 mm
93 mm 3s
CPWG, /08

30. Detailed error description
In preparation
CPWG, /08

31. Tunnel integration - Tunnel cross-section dated sept 2006
Update of the cross-section from summer 2007
standard cross-section
special cross-sections with drive beam “in” and drive beam “out”
CPWG, /08

32. CLIC beam layout
CPWG, /08

33. CPWG, /08

34. Cost estimate
Dedicated activity in collaboration with H. Braun and C. Wyss
Module breakdown updated for standard and special module
aim: cost estimate update for June 2007
CPWG, /08

35. Future work
Finish first round of system integration for standard module  may 2007
Start first round of system integration for special modules  June 2007
Initiate next level of design for standard and special modules  summer 2007
Continue study on alignment:
Definition/justification of each error
Supporting system and tunnel integration  summer 2007
Cost estimate
Update by June 2007
CPWG, /08