Optimizing CLIC Supermodules: A Strategy for Cost Reduction and Enhanced Performance
The CLIC cost is significantly influenced by the numerous components involved, necessitating a reduction in their quantity. This presentation emphasizes the introduction of supermodules and longer girders, focusing on the assembly of two accelerating structures into one unit to halve interconnections. Key points include enhanced alignment, maintenance strategies, and the exploration of various module types and lengths, with recommendations for future studies on girder lengths to optimize performance and minimize costs.
Optimizing CLIC Supermodules: A Strategy for Cost Reduction and Enhanced Performance
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Presentation Transcript
CTC meeting – 2009.11.16 CLIC super-modules H. Mainaud-Durand, G. Riddone
Motivation • The CLIC cost is driven by the very large number of components • Therefore, it is important to reduce the number of components • Actions: • Supermodules longer girders (today discussion) • Superstructures longer structures • Two accelerating structure will be assembled to form one unit (interconnections in situ are halved) • WFM: for cost estimate two per girder (for test module one per ac. structure for learning process)
Module types and numbers Type 0 Total per module 8 accelerating structures 4 PETS 2 DB quadrupoles 2 DB BPM Total per linac 8374 standard modules DB MB
Module types and numbers • Total per linac • Quadrupole type 1: 154 • Quadrupole type 2: 634 • Quadrupole type 3: 477 • Quadrupole type 4: 731 • Other modules • end sector modules: 92 Type 1 Type 3 Type 2 Type 4
Module sections IP Close to IP better alignment
Baseline • Module length dictated by girder length (CTF2 girder: 1.4 m) and by optics: 2.010 m • Baseline: • snake system with articulation point between two girders (snake system interrupted at each main beam quadrupole) • linear actuators: at present compatible with weight for 2-m long girder • girder material: SiC, 2-m girder fabrication is already an issue
Super modules - What about longer girder • Advantages • Less movers and sensors • Less elements to be transported (several 2-m long girder could already be interconnected at surface) • Less in-situ interconnections (same comment as nefore) • To be considered • Linear actuators compatibility - Preloading is possible? – Cam system • Optics compatibility (see slide #5) • Material compatibility: other materials than SiC could be used, such as steel and mineral cast • More complicate metrology • Better (x1.4) resolution for stepper motors • Additional types of modules • Maintenance strategy: in case of failure, replacement of a 2-m long module is easier than a 4-m long module
Conclusions • Test module baseline must be frozen very soon – proposal to go with 2-m long girder. The length of the modules will not drastically change the scope of the test modules • CTC recommendation: • cost estimate based on 2-m girder length • variants to be studied: • 4-m long girder for MB and DB • 4-m long girder for DB only
