TOTEM Roman Pot Upgrade Project Pots design, tests and timeline production CERN 11 July 2013 D.Druzhkin (NIKIET, Moscow, Russia) 1 & 20th LTEX Meeting

New Roman Pot station with one horizontal Pot Timing detectors based on QUARTIC L-bars LSS Outgoing beam Roman Pot station with two horizontal Pots Upgrade proposal for LS1 1. Horizontal Roman Pot a) mech. Structure – VACUUM PRAHA sr.o (present design & safety); b) housing – CERN (new design); c) timing detector. 2.Frame – VACUUM PRAHA sr.o (modified design) 3.Support plate – CERN (present design) 4.Bellows – CERN (Standard BP bellows 300mm) Horizontal Roman Pot Frame Support plate Bellows

PP (as for RP 147m) Layout in the tunnel (LSS ~216m from IP5)

Roman Pot Vacuum chamber Timing detector LHC vacuum chamber Bellows LHC vacuum chamber Roman Pot Housing Timing detector inside Roman Pot Housing 1bar pressure load Ferrite ring Ø195/162x5

5x5 QUARTIC L-bars 3x3mm Placement of Timing detector in the Housing and in the RP vacuum chamber

First prototype Placement of Timing detector in the Housing and in the RP vacuum chamber housing RP vacuum chamber

10σ position

Garage position

10σ position

Placement of Timing detector in the Housing and in the RP vacuum chamber NEG coating (?)

New (cylindrical) housing design

The design and technology of PROTOTYPE are adjusted; the material is ordered for 4 PROTOTYPE housings (for follow-up inspection and tests); expected date of performance ~ august D. Perini and F. Bertinelli.

For produced housing the following tests are planned: 1) Geometry verification (flatness of windows; surface roughness; tolerances, …); 2) Strength structural tests for 1 bar; deflection measurement; cycles loading test; 3) Gas permeability (diffusion through the window material); 4) Mechanical tests in assembly with the Roman Pot (moving test, safety mech., compensation mech., stoppers, and the like). Adjustment and tuning. 10um copper (?)

316LN (20˚C) Σ 0.2 = 607 MPa; Σ U = 812 MPa; E = 193 GPa. Stress; Inner pressure 1 bar Thin window 0.3mm Stress; Outer pressure 1 bar Crush test (as for present rectangular housing)

316LN (20˚C) Σ 0.2 = 607 MPa; Σ U = 812 MPa; E = 193 GPa. Thin window 0.2mm Inner pressure 1 bar Guillaume Maitrejean simulation taking into account cyclical load