RFD PreSeries Prototype Cryomodule Concept Design Study Niklas

RFD Pre-Series Prototype Cryomodule Concept Design Study Niklas Templeton 14/09/17 RFD SPS/LHC Studies logo area

RFD Pre-Series Prototype Cryomodule RFD § RF Dipole Cavity for Horizontal Crabbing at Point 5 (CMS) SPS/LHC Prototype Cryomodule § 1 cryomodule with 2 identical cavities § Design to be done as LHC prototype § Design collaboration CERN, USLARP, UK § Manufacturing § § § Images not to scale Cavities – CERN Cryomodule – UK and CERN Cryomodule assembly – UK Cold test – CERN To be tested in SPS after LS 2, in 2021 2

Schedule & Planning 3

RFD LHC/SPS Prototype: Dressed Cavity Fixed: § Cavity § Cold Magnetic Shield To Be Updated: § Helium Tank § FPC § Tuner § HOM Coupler § RF Probe New Conditions: § 2 nd Beamscreen RFD SPS Concept Design 4

RFD LHC/SPS Prototype: Cavity String Fixed: § FPC Distance - 1050 mm? To Be Updated: § CWTs § Cryolines § Valves & Valve Box § Support & Alignment System § Top Plate Integration New Conditions: § 2 nd Beamscreen § No BCAM § LHC Slope (1. 24% ≈ 0. 71°) § Internal Vacuum Instrumentation* § New Cryo Pressure Relief Valve RFD SPS Concept Design 5

RFD LHC/SPS Prototype: Cryomodule Fixed: § Trapezoidal / Top Loaded Configuration ? To Be Updated: § Vacuum Vessel Design § Cryomodule Limits § Cryo-Service / Jumper § FSI § RF Lines § Thermal Shield & MLI § Warm Magnetic Shield New Conditions: § No Gaskets / O Rings in LHC – Welded Vessel - No Windows § LHC Slope & Space Constraints § Split insulation vacuum § Level Gauge RFD SPS Concept Design 6

LHC Vacuum Spec. Conceptual Specifications: § 4 Sector Valves (DN 100) per Cryomodule are interlocked to the beam and allow conditioning at surface § 4 Instrumentation Ports (DN 63) – 2 per beam line, required for vacuum diagnostics 7

Vacuum Interlocks & Services STFC Proposal: • Replace the cavity-string Sector Valves with manually operated Isolation Valves to complete clean room assembly • Include sector valves & vacuum instrumentation in the vacuum service module (Cryomodule Interconnection) • Could allow simplified configuration for Cryostating

Cavity String § Increasing CWTs will increase Overall length § No Space for Vacuum Instrumentation - DN 63 Flange (114 mm) + Tube (64 mm) § DQW String Length: 2353 mm Warm Module Bellows Simplified Representation 9

Interlocks & OVC Interface • Double Valve Box is significantly larger even after geometry optimization • At least 115 mm staggering is required between the valves for integration – creates manufacturing difficulties • LHC spec is that no gaskets or O ring to be used due to radiation damage – design to be updated for welding • Leaktight welding of Vacuum Vessel posses risk to Warm Magnetic Shield due to high temperatures DQW Valve Box Double Valve Box Configuration 10

Internal OVC Geometry § Geometry optimised for Valve Box integration § DQW Trapeziod: 2660 / 2165 mm 11

Crab Cavity Test Stand – SPS LSS 6 12

Crab Cavity Test Stand – SPS LSS 6 Upper Limits 1100 Space Constraints 194 Y Chamber 494 760 420 RF Power Transfer Table 13

LHC Point 5 No Additional Constraints ü Design for SPS (+ 190 mm floor-beam height requires adjustment or additional frame) 14

109 724 355 60 30 DQW 2 -Phase Line SPS 16 litres in reservoir Nominal LHe Level: 724 mm (1/2 Full) Ensures 30 mm above HOM Cooling 15

30 692 350 60 30 RFD 2 -Phase Line SPS ~16 litres in reservoir Nominal LHe Level: 692 mm ensures 30 mm above HOM Cooling 16

Parallel 2 -Phase Line LHC (-1. 24%) -12. 2 - 24. 4 Cavitystring Length: 1970 mm 17

Parallel 2 -Phase Line LHC (-1. 24%) +25 mm 690 30 703 43 + 25 Additional height to maintain LHe surface area - leaves -20 mm for integration compared to DQW ~21 litres in reservoir Nominal LHe Level: 690 & 703 mm ensures 30 mm above HOM Cooling 18

Parallel 2 -Phase Line LHC (-1. 24%) – Modified HOM Cooling Alternative Option: Separate LHe Inlet & GHe Outlet lines for HOM cooling ~16 litres in reservoir New HOM cryo-circuit ensures cooling 19

Diverging 2 -Phase Line LHC (-1. 24%) Diverging Cryoline: Horizontal in LHC for constant fluid level – requires modified HOM cooling, + 12. 5 mm for integration upstream, - 12. 5 mm for integration downstream. Less compatible for SPS… 20

Integration DQW 21

Integration DQW • Integration of MLI x 2, Thermal Shield & Warm Magnetic Shield is extremely tight – adding cryo-line height not feasible • Limit set by FPC interface – Raising the FPC support system will give more space and allow simplification 22

Questions/Discussions for CERN § Valve Box Design & Manufacture § § § Further Studies needed for all-welded vessel compatibly Critical for cavity beamline, could be removed for 2 nd beamline tbd. FPC Interface & Top Plate Integration § Copper interface part to be redesigned to ease top plate § Cryoline relief valve for LHC to be added (!) § Vacuum block in the jumper to separate cryoservice module – design study required Specification for removable level probes § External cut and welded solution with up to 4 level probes§ (2 per cavity) – heat leak to be optimised § To be studied, additional cryoline design requirement Additional Points integration § Beam Screen Cooling (RF Shielding) Sector/Isolation Valve Requirement § § § drawing together, perform ‘smarteam save’ for 2 -phase line design (HOM cooling circuit) § Parallel design optimal for tessellated modules § HOM heatload lower for RFD, could be passive cooled Smarteam drawing copies – open model and both § Using smarteam with VPN – tbd (tbd) 23

Thank You! Questions? 24

2 K 2 K Manual Isolation Valve 2 K 2 K 2 K Manual Isolation Valve logo area Manual Isolation Valve

2703 Total Length + 115 For 2 nd Valve 264 CWT Up 1050 FPC Distance 240 CWT Down 1970 Dressed Cavities logo area 26

OVC Interface 540 x 440 mm Outer Valve Assembled 1 st Pre-assembled before cavity string connection Geometry optimised to minimise interface size *Manufacture to be discussed Gate Valve Interface Additional port requires welding logo area 27

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