the spl short cryo -module: status report

The SPL Short Cryo-module:Status Report

V.Parma, CERN, TE-MSC

On bahalf of the Cryomodule development team

SPL seminar December 2012, 6-7 December 2012, CERN

The actors on stage...System/Component/Activity Person(s) in charge Lab

Cavities/He vessel/tuner construction O.Brunner, O.Capatina, Th.Renaglia, F.Pillon, N.Valverde, M.Esposito, I.Aviles,G.Devanz

CERN

CEA-Saclay

SRF, magnetic shielding, Clean-Room activities, RF test stations (SM18)

E.Ciapala, T.Junginger, K.Shirm, J.Chambrillon, O.Brunner

CERN

RF Coupler E.Montesinos, G.Devanz

CERNCEA Saclay

Vacuum systems G.Vandoni CERN

Cryogenics, (cryo infrastructure SM18) U.Wagner, (O.Pirotte) CERN

Survey and alignment P.Bestman CERN

Cryo-module conceptual design R.Bonomi, D.Caparros, O.Capatina, P.Coelho, V.Parma,Th.Renaglia, A.Vande Craen, L.R.Williams

CERN

Cryo-module detailed design & Integration & Cryostat assembly tooling

Ph.Dambre, P.Duthil, P.Duchesne, S.Rousselot, D.Reynet

CNRS/IPNO-Orsay

SPL Machine architecture F.Gerigk CERN

ESS Cryomodule developments Ch.Darve ESS, Lund

Cryo-module Technical Coordination V.Parma CERN

ESS/CERN Fellow

ESS/CERN Fellow

ESS/CERN Fellow

ESS/CERN Fellow

SPL Cryomodule Workspace

https://espace.cern.ch/spl-cryomodule/default.aspx

SPL Cryomodule Working Group8 meetings in 2012 (from March on)

SPL Cryomodule exhibition (CERN, French in-kind meeting, June 2012)

Assembly sequence1- String of cavities outside the clean room2- Mounting of the magnetic shields4- Mounting of the cryogenic distribution3- Mounting of the tuners and inter-cavity connections 5- Mounting of the coupler cooling line6- Mounting of the thermal shield7- Insertion in the vacuum vessel8- Closing the vacuum vessel

Design by CNRS-IPNO (S.Rousselot)

2 parts vacuum vessel

• Material is low-carbon steel (LHC type)• Vessel as magnetic shielding: need for

degaussing? • Flanges in St.steel (304L)

Mechanical analysis at CNRSLoads when closing

242mm

1.2mm rattrapé par 2 vis contigüesEffect of a gap at closure

CNRS-IPNO, P.Duchesne, P.Duthil

…and at CERN

See Paulo Azevedo’s talk

Mounting of the lid: effect of flat flanges shape imperfections; CERN approach

Load case 1

Load case 2

Deformed shape:

Pressure relief devices

See Paulo Azevedo’s talk

• First risk analysis made• HSE now in the loop (C.Parente), several meetings

took place• Sizing of safety relief devices:

– Burst disks to protect helium circuits– Pressure relief plate to protect insulation vacuum vessel

Vacuum vessel detailed design

• Specification detailed drawings in preparation at CNRS-IPNO

• Drawings approval in progress• Consultation of companies started • Procurement to be launched beginning 2013 by

CNRS-IPNO

Cold magnetic shieldStatus:• Following feedback from RF (T.Junginger), a re-design has been

proposed by CNRS and approved, ready for detailed drawings

Cold magnetic shield Double layer

Coupler side Tuner sideDesign by CNRS-IPNO (S.Rousselot)

Cryogenic distribution

xy

z

Pumping line (XB)

To cold box

and SM18

2 phase tube(line X)

Vapours collectorLiquid container

LHe Level gauge

Courtesy CNRS-IPNO (S.Rousselot, P.Duthil)

Valve box and cryogenic scheme in SM18

• Control valves grouped in a single valve box

• Valve box needed also for interfacing CM to cryogenic distribution in SM18

• Overpressure safety devices

Valve boxStatus:• Conceptual design finished• Valves being ordered by TE-CRG• Heater on the thermal shield will warm up thermal shield

helium to the CM needs (50K) design in progress

From SM18

To CM

Vacuum barrierVacuum vessel

Thermal shield

Courtesy CNRS-IPNO (S.Rousselot, P.Duthil)

Cryo valve specs• JT valves (common and single valves):

– Use : superfuid helium– Diameter: DN4– WEKA standard design: h=875mm - PN25 - no

thermal contact, no G10 spindle rod– Po=normally closed actuators– helium guard seal for subatmospheric applications– Kv max as controlled valve: 0.6m3/h

• Required max. Kv at 100% stroke: 0.1 m3/h (common), 0,02 m3/h (single)

• Required min. Kv at 5% stroke: 0.001 m3/h– Equal percentage– Quantity: 4

Needs agreed with TE-CRG (R.Van Weelderen) TE-CRG can start procurement

• Cool-down valves: – Use : liquid/gas helium– Diameter: DN4– WEKA standard design: h=875mm - PN25 - Standard

sealing to outside - no thermal contact, no G10 spindle rod

– Po=normally closed actuators– Kv max as controlled valve: 0.6m3/h

• Required max. Kv at 100% stroke: 0.18 m3/h (common), 0,02 m3/h (single)

• Required min. Kv at 5% stroke: 0.004 m3/h– Equal percentage– Quantity: 4

• Coupler cooling valve: – Use : Liquid/gas helium– Diameter: DN2– WEKA standard design: h=875mm - PN25 - Standard

sealing to outside - no thermal contact, no G10 spindle rod

– Po=normally closed actuators– Kv max as controlled valve: 0.15m3/h

• Required max. Kv at 100% stroke: 0.06 m3/h (common), 0,02 m3/h (single)

• Required min. Kv at 5% stroke: 0.002 m3/h– Equal percentage– Quantity: 1

9 cryo valves

Cavity vacuum valves

• Choice discussed with TE-VSC (G.Vandoni)ready for procurement

Cryomodule instrumentation

~100 T gauges

10 Elec.heaters

4 He level gauges

4 Piezos, tuners,HOM

Pressure gaugesOptical Wire Position Monitor

Bunker integration studies at CERNSM18 bunker

Valve box

RF distribution

Cryo line interface

Cryo-module

Study by P. Martinez Yanez and B.Riffaud, EN-MME

SPECIAL LENGTH CORRESPONDING TO CRYOMODULE ANGLE

Study by P. Martinez Yanez and B.Riffaud, EN-MME

Pending work:• Full integration study (access, services, safety evacuation of He, …)• Design and construction of an inclination table (0%-2%) for the cryomodule• Study the opening of the CM top part of vessel for in-situ maintenance and

construction of the handling equipment

Bunker integration studies at CERN

CRYOMODULE 2% INCLINATION

Status of supporting system mock-up

See P. Azevedo’s and R. Bonomi’s talks

Master Schedule

Preparation of SM18 infrastructure (cryogenics, RF, clean-room)

Cavities production

Cavities processing/RF testing

RF couplers

Clean room assembly of string

Cryomodule (& assy tooling) design

Cryomodule fabrication

Cryomodule assembly

Start cryomodule RF testing

Summary 2012, Outlook 2013

• Notable progress in the design of the CM this year:– Vacuum vessel: almost ready for procurement– Magnetic shield: design finalized– Cryogenic piping: design well progressed – Thermal shield: design in progress– Cryogenic and vacuum valves: choice made, procurement can

start– Instrumentation: preliminary list

• Assembly tooling: – Concepts only: work needs to start now

• Valve box:– Conceptual design made

• Major milestones for 2013– Launch procurement of vacuum vessel , early 2013– Other parts to be ordered by mid 2013– Design of assembly tooling by mid 2013