Stabilisation day #6
Brief news from CLIC module WG
G. Riddone on behalf of the CMWG, 09.06.2009
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Content
Recall of baseline design for CDR
Design evolutions (from version 2 to version 4)
Future work
G. Riddone, SD#6, 09/06/2009
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Module design baseline
G. Riddone, SD#6, 09/06/2009
Accelerating structure: CLIC G (100 mV/m, L = 230 mm, aperture ~ 5 mm)
PETS: CLIC note 764 (6.5 MV/m, L=310 mm, aperture 23 mm)
1 PETS powering 2 accelerating structures
Beam interaxis: 650 mm same height for the two beams Accelerating structures and PETS + DB Q on girders (same
girders based on MB girder design) Girder end supports cradles mechanically attached to a
girder and linked by rods to the adjacent one: snake-system adopted(DB: 100 A, MB: minimization of wakefields, validation at 30 GHz in CTF2)
Separate girders for main and drive beam possibility to align DB quadrupole separate from accelerating structures
Separate support for MB Q and its BPM MB Q and BPM rigidly mechanically connected Common actuators/devices for stabilization and beam-based
feedback systems
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Module type 1
G. Riddone, SD#6, 09/06/2009
MB Q + BPM 6 AS
2 DB Q + BPMs
3 PETS
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Module type 1 – version 2
G. Riddone, SD#6, 09/06/2009
All 3D models made by A. Samoshkin
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Module type 1 views – version 2
G. Riddone, SD#6, 09/06/2009
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CLIC two-beam module - version 2
G. Riddone, SD#6, 09/06/2009
Continuity between girdersAll MB girders have the same lengthMB Q support passes over the MB girderMB Q beam pipe and AS beam pipe are coupled via bellows
CTF2
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CLIC two-beam module - version 4
G. Riddone, SD#6, 09/06/2009
No full continuity between MB girders (increasing of align. cost)MB girder length changes as function of module type No girder underneath MB Q Beam height loweredMBQ support simplified MB Q beam pipe and AS beam pipe are coupled via bellows
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Future work
G. Riddone, SD#6, 09/06/2009
At present the beam height is imposed by the drive beam: Height of the girder (same as for MB
girder) DBQ support DBQ dimensions
ACTIONS Calculation for the DB girder has been
launched to optimise its size and with the aim of lowering its height
Confirmation of DB Q dimensions and support (CERN-Crockford institute)