1. CLASSE prototype: mechanical concepts G. De Michele, EPFL-PSI-CERN on behalf of CERN team SLAC, 16 th April, 2012

2. CLASSE prototype: CATIA model (1/3) 6 sections, 26 cells each, compact coupler design Clamped aluminum disks Ø180mm (x6)TD26 with Compact Couplers Cell shape accuracy 20µm Aluminium disk Damping material (SiC) Threaded rod for disk clamping Corner for SiC fixation Al disk Features for Tank alignment on the girder Features for AS alignment in the Tank Reference spheres AS A. Solodko, CERN Beam

3. CLASSE prototype: CATIA model (2/3) A. Solodko CERN

4. Frames for AS fixation Screws for vertical AS alignment (x5) Blocks for horizontal AS alignment (x4) CLASSE prototype: CATIA model (3/3) A. Solodko, CERN Estimated total load of the CERN installation is about 400 kg Two vacuum ion pumps (noble diode pumps, 53 l/s) The RF structure is aligned mechanically inside the vacuum tank The vacuum tank will be aligned to the beam axis by means of adjustable feet Two tooling balls on both ends are present on top of the vacuum tank

5. CLASSE drawing A. Solodko, CERN

6. Existing girder (a) Clamps (b) LI02 sector: location of ASSET test

7. Questions and remarks Deadline - supposed date for the installation. SLAC expert contact for integration check. Needed alignment features on the tank. Possibility to use existing strongback alignment features should be checked taking into account the weight of the tank (400 kg). Drawings or sketches if they exist. Value for alignment. What is the alignment procedure at SLAC and there will be a check of AS alignment into the tank at SLAC? Is manpower available? Bellows should be fabricated and inserted to cover  25cm length. Two ion pumps (53 l/s) are required. Can SLAC provide them? If so, which type of flange do we need? The AS will be aligned and fixed into the tank at CERN. After that will be shipped at SLAC. Compatibility of.stp file with the up-to-date SLAC layout The final drawings should be commented by SLAC colleagues (as soon as they will be finished).