Design of a SHORT Cryomodule for the Superconducting Proton Linac of CERN IPNOrsay – CNRS Sébastien ROUSSELOT Patxi DUTHIL Patricia DUCHESNE Philippe DAMBRE.

Slides:



Advertisements
Similar presentations
SPL Intercavity support Conceptual design review 04/11/ A. Vande Craen TE/MSC-CMI.
Advertisements

The HiLumi LHC Design Study is included in the High Luminosity LHC project and is partly funded by the European Commission within the Framework Programme.
Cell-Coupled Drift Tube Linac M. Pasini, CERN AB-RF LINAC4 Machine Advisory Committee 1 st meeting CERN January 29-30, 2008.
Alignment and assembling of the cryomodule Yun He, James Sears, Matthias Liepe MLC external review October 03, 2012.
Ofelia Capatina on behalf of the CERN specification team
SPL cryo-module conceptual design review Cavity, helium vessel and tuner assembly N. Valverde, G. Arnau, S. Atieh, I. Aviles, O. Capatina, M. Esposito,
Status of vacuum & interconnections of the CLIC main linac modules C. Garion TE/VSC TBMWG, 9 th November 2009.
SRF Results and Requirements Internal MLC Review Matthias Liepe1.
R&D Status and Plan on The Cryostat N. Ohuchi, K. Tsuchiya, A. Terashima, H. Hisamatsu, M. Masuzawa, T. Okamura, H. Hayano 1.STF-Cryostat Design 2.Construction.
ESS cavities interfaces
V.Parma, CERN, TE-MSC On bahalf of the Cryomodule development team
MQXF Cold-mass Assembly and Cryostating H. Prin, D. Duarte Ramos, P. Ferracin, P. Fessia 4 th Joint HiLumi LHC-LARP Annual Meeting November 17-21, 2014.
Preliminary design of SPPC RF system Jianping DAI 2015/09/11 The CEPC-SppC Study Group Meeting, Sept. 11~12, IHEP.
Summary of WG 2 - cavities W. Weingarten 15th SPL Collaboration Meeting CERN - 25/26 Nov Cavity WG.
Workshop on cryogenic and vacuum sectorisations of the SPL CERN, 9 th -10 th November 2009 Workshop Organisation and Goals Vittorio Parma TE-MSC.
SCU Segmented Cryostat Concept M. Leitner, S. Prestemon, D. Arbelaez, S. Myers September 2 nd, 2014.
WP3 Required interfaces for cryostat design / integration Patxi DUTHIL SPL 3 rd Collaboration Meeting, CERN, Geneva November 12 th 2009.
Arnaud Vande Craen (TE-MSC) 27/02/20131 EUCARD : ESAC Review – CEA Saclay.
Test plan for SPL short cryomodule O. Brunner, W. Weingarten WW 1SPL cryo-module meeting 19 October 2010.
56 MHz SRF Cavity Thermal Analysis and Vacuum Chamber Strength C. Pai
1Matthias LiepeAugust 2, 2007 Future Options Matthias Liepe.
The HiLumi LHC Design Study (a sub-system of HL-LHC) is co-funded by the European Commission within the Framework Programme 7 Capacities Specific Programme,
Alignment and assembling of the cryomodule Yun He, James Sears, Matthias Liepe.
Cryostat & LHC Tunnel Slava Yakovlev on behalf of the FNAL team: Nikolay Solyak, Tom Peterson, Ivan Gonin, and Timergali Khabibouline The 6 th LHC-CC webex.
SLHC WG3 (Cryomodule) summary & plan with recommendation to the CB V.Parma, CERN TE-MSC P. DUTHIL, IN2P3-CNRS 3rd SPL collaboration meeting, CERN
LHC Cryostat evaluation Nikolay Solyak Thanks Rama Calaga, Tom Peterson, Slava Yakovlev, Ivan Gonin C11 workshop. FNAL, Oct 27-28, 2008.
Rossana Bonomi R. Bonomi TE-MSC-CMI SPL Seminar 2012.
SLHC-PP WP7 8 April 2008 Structure SLHC- PP WP7 SLHC-PP Steering Group SPL Study Group DESY Peters INFN ? CERN Scrivens / Hofle STFC- RAL Faircloth CEA.
The HiLumi LHC Design Study is included in the High Luminosity LHC project and is partly funded by the European Commission within the Framework Programme.
ESGARD – OMIA 10 & 11/09/2007 JRA on Sc cavities and Cryomodule for a Pulsed proton Linac Motivation Work Packages Partners & resources R. Garoby for S.
Cryogenic scheme, pipes and valves dimensions U.Wagner CERN TE-CRG.
Date 2007/Sept./12-14 EDR kick-off-meeting Global Design Effort 1 Cryomodule Interface definition N. Ohuchi.
SPL cryomodule specification meeting, CERN 19th October 2010 SPL cryomodule specification: Goals of the meeting SPL cryomodule specification: Goals of.
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,
Mechanical design considerations for beta=1 cavities OC, 28/July/20111SRF2011 Chicago O. Capatina, S. Atieh, I. Aviles Santillana, G. Arnau Izquierdo,
CW Cryomodules for Project X Yuriy Orlov, Tom Nicol, and Tom Peterson Cryomodules for Project X, 14 June 2013Page 1.
Ralf Eichhorn CLASSE, Cornell University. I will not talk about: Cavities (Nick and Sam did this) HOM absorbers (did that yesterday) Power couplers (see.
Low Beta Cryomodule Development at Fermilab Tom Nicol March 2, 2011.
Spoke section of the ESS linac: - the Spoke cryomodules - the cryogenic distribution system P. DUTHIL (CNRS-IN2P3 IPN Orsay / Division Accélérateurs) on.
Status of the SPL cryo-module design V.Parma, CERN, TE-MSC On behalf of the SPL cryomodule development team (CERN, CEA-Saclay, CNRS-IPNO Orsay, ESS)
11/12/2013P. Bosland - AD-retreat - Lund Designs of the Spoke and Elliptical Cavity Cryomodules P. Bosland CEA/Saclay IRFU On behalf of the cryomodule.
R. Bonomi - SLHiPP2, Catania 3-4/5/20121 SPL Thermal Studies R. Bonomi Superconducting linacs for high power proton beams - Catania, 2012.
The HiLumi LHC Design Study is included in the High Luminosity LHC project and is partly funded by the European Commission within the Framework Programme.
Cavity Supporting Scheme Paulo Azevedo, CERN – TE/MSC SPL Conceptual Review, 04/11/2010.
ILC : Type IV Cryomodule Design Meeting Main cryogenic issues, L. Tavian, AT-ACR C ryostat issues, V.Parma, AT-CRI CERN, January 2006.
ESS Cryomodule Status Meeting – Introduction | | Christine Darve Introduction to Cryomodules for the ESS 2013 January, 9 th Christine Darve.
650 MHz, Beta = 0.9, 11 April 2012Page 1650 MHz, Beta = 0.9, 11 April 2012Page 1 Project X Beta = 0.9, 650 MHz Cavity and Cryomodule Status Tom Peterson.
Two-beam module layout
Infrastructure status and plans at CERN 1) W. Weingarten/CERN TTC Milano 28 February - 3 March W. Weingarten/CERN 1)Most of the slides are based.
F LESEIGNEUR / G OLIVIER LUND January 9th, ESS HIGH BETA CRYOMODULE ESS CRYOMODULE STATUS MEETING HIGH BETA CRYOMODULE LUND JANUARY 9TH, 2013 Unité.
Status of the SPL cryomodule study Rossana Bonomi Lund, 6 th Dec R. Bonomi.
SPL RF coupler: integration aspects
CERN – Zanon discussions
Status and plans for the 3.9 GHz section of XFEL
WP5 Elliptical cavities
HFM Test Station Main Cryostat
Status of design and production of LEP connection cryostat
A. Vande Craen, C. Eymin, M. Moretti, D. Ramos CERN
Plans for a Superconducting Proton Linac at CERN
CERN Cryomodule Requirements for Crab Cavities
ESS RF Development at Uppsala University
UK RFD Pre-Series cryomodule
RAPPEL TITRE PRESENTATION
HIE-LINAC status report
IHEP Cryomodule Status
ESS elliptical cryomodule
Cryomodules Challenges for PERLE
ESS elliptical cryomodule
ERL Director’s Review Main Linac
Magnetic shielding and thermal shielding
Presentation transcript:

Design of a SHORT Cryomodule for the Superconducting Proton Linac of CERN IPNOrsay – CNRS Sébastien ROUSSELOT Patxi DUTHIL Patricia DUCHESNE Philippe DAMBRE Denis REYNET CERN Vittorio PARMA Arnaud VANDE CRAEN Paulo AZEVEDO Lloyd R. WILLIAMS Ofelia CAPATINA CEA Stéphane CHEL Guillaume DEVANZ Unité mixte de recherche CNRS-IN2P3 Université Paris-Sud 11 91406 Orsay cedex Tél. : +33 1 69 15 73 40 Fax : +33 1 69 15 64 70 http://ipnweb.in2p3.fr TTC meeting December 6th 2011

contents - Context of the SPL - =1 cryo-module in a possible SPL layout =1 cavity layout 2K Heat loads Segmented configuration, dimensions - Goal & motivations of the short cryomodule Goal & motivations Cryostat specific main objectives - Cryogenic aspects Short cryomodule cryogenic scheme Cooling lines Filling lines Coupler cooling lines - Cavity Supporting System The supporting system concept The vacuum vessel/coupler interface The inter-cavity supporting system - Short cryomodule layout - Vacuum vessel design Constraints Requirements Vacuum vessels and tooling concepts Cold magnetic shielding Thermal shielding - Summary

CERN’s expected new LHC injection line (former plans) Context of the spl CERN’s expected new LHC injection line (former plans) LP-SPL: Low Power-Superconducting Proton Linac (4 GeV) PS2: High Energy PS (~ 5 to 50 GeV – 0.3 Hz) sLHC: “Super-luminosity” LHC (up to 1035 cm-2s-1)

Goal & motivations of the short cryomodule CERN’s new scientific strategy: R&D for a High Power SPL (HP-SPL) General orientation: Focus on R&D for key technologies for a high-intensity proton source (HP SPL) for a neutrino facility In particular, for the cryo-module development: Development, construction and test of β=1 elliptical cavities, 704 MHz Development, construction and test of RF couplers Test of a string of 4 β=1 cavities in a machine-type configuration This program calls for the design and construction of a short cryo-module for testing purposes

=1 cryo-module in a possible SPL layout =1 cavity layout Cryogenic connection Reserve port Stainless steel He vessel Tooling interface Tooling interfaces CEA cavity design Requirement Value β 1 Frequency 704.4 MHz Qo 5 x 109 Gradient 25 MV/m Operat. T 2 K The He vessel includes specific interfaces for the cryomodule integration: Inter-cavity supports 1 cryogenic feed External magnetic shielding via cryoperm™ (not shown) Tooling (in/outside the clean room)

Heat Load @ 2K (per cavity) =1 cryo-module in a possible SPL layout 2K Heat Loads (per =1 cavity) Operating condition Value Beam current/pulse lenght 40 mA/0.4 ms beam pulse 20 mA/0.8 ms beam pulse cryo duty cycle 4.11% 8.22% quality factor 10 x 109 5 x 109 accelerating field 25 MV/m Source of Heat Load Heat Load @ 2K (per cavity) Beam current/pulse lenght 40 mA/0.4 ms beam pulse 20 mA/0.8 ms beam pulse dynamic heat load per cavity 5.1 W 20.4 W static losses <1 W (tbc) ~ 1 W (tbc) power coupler loss at 2 K <0.2 W HOM loss in cavity at 2 K <1 <3 W HOM coupler loss at 2 K (per coupl.) beam loss 1 W Total @ 2 K 8.5 W 25.8 W

=1 cryo-module in a possible SPL layout « Segmented » architecture with warm quads and a cryo distribution line 60 β=0.65 cavities in 20 cryomodules 184 β=1 cavities in 23 cryomodules SRF linac  500 m long Warm quadrupole Cryogenic Distribution Line =0.65 cryomodule (3 cavities) =1 cryomodule (8 cavities) Jumper Heat loads for SPL high-b module Static load estimated to 2.5 % of total load. Assessment of static load is of minor importance at this state (end of conceptual design)

Goal & motivations of the short cryomodule RAPPEL TITRE PRESENTATION mercredi 28 novembre 2018 Goal & motivations of the short cryomodule The short cryomodule design strategy Test-bench for RF testing on a multi-cavity assembly driven by a single or multiple RF source(s) Enable RF testing of cavities in horizontal position, housed in machine-type configuration Validate the design of critical components like RF couplers, tuners, HOM couplers in their real operating environment  short cryomodule design Goal Design and construct a ½-lenght cryomodule for the test of 4 β=1 cavities (instead of 8 in a machine type cryomodule) in conditions as close as possible to a machine-type cryomodule 4 cavities less Mechanical design Cryogenics (Heat loads, T and P profiles, segmented machine layout) Designed for 0%-2% test (for 1.7% expected tunnel slope)

Goal & motivations of the short cryomodule Cryostat and tooling overview Cryostat specific main objectives Learning of the critical assembly phases: From the assembly of cavities in the clean room to the a cryomodule test Alignment/assembly procedure Proof of concept of “2-in-1” RF coupler/cavity supporting: Fully integrated RF coupler: assembly constraints Active cooling effect on cavity alignment Operation issues: Cool-down/warm-up transients, thermo-mechanics, heat loads Alignment/position stability of cavities Cryogenic operations (He filling, level controls, RF coupler support tube cooling) Technical solutions focus on the ½-lentgh cryomodule But technical solutions are developed for the full length cryomodule (Specifically the tooling for the cryostating)

Cavity cooling down lines Cryogenic aspects Short cryomodule cryogenic scheme Thermal shield (50-75K) Coupler cooling Pumping line Bi-phase pipe Cavity top supply Cavity cooling down lines Coupler cooling SM18 connexion valves

Cavity cooling down lines Cryogenic aspects Cooling lines Requirements: 1 cooling line per cavity Cavity cooling down lines Mass flow rate 2.5g/s per cavity Expectation (machine): 1 cooling line for the hole string of cavities ?

Filling lines Mass flow rate 10g/s Cryogenic aspects Requirements: 1 JT valve may allow for the filling of the first cavity then for the filling of the others via a roman fountain (successive helium fall filling via the diphasic pipe) Cavity top supply Mass flow rate 10g/s Slope : 1.7% (ajustable from 0 to 2% for the tests)

Mass flow rates 2.5g/s per cavity Cryogenic aspects Filling lines Requirements: If slope = 0% or in case of a problem with the roman fountain (superfluid) 1 filling line per cavity (each being equipped with a JT valve) (Prototype only: priority = test bench for a string of 4 cavities) Cavity top supply Mass flow rates 2.5g/s per cavity Slope : (0% for the tests)

Coupler cooling line Outlets Mass flow rate 0.8g/s Cryogenic aspects Requirements: One single line for the cooling of the couplers. 4 outlets with 4 control valves @ 300K 1 vaporizer (boiler) Vaporizer Mass flow rate 0.8g/s Outlets

Cavity Supporting system RAPPEL TITRE PRESENTATION mercredi 28 novembre 2018 Cavity Supporting system The concept Intercavity supports RF coupler double-walled tube flange fixed to vacuum vessel The RF coupler (its double-walled tube) provides: fixed point for each cavity (thermal contractions) mechanical supporting of each cavity on the vacuum vessel The intercavity supports provide: a 2nd vertical support to each cavity (limits vertical self-weight sag) relative sliding between adjacent cavities along the beam axis enhancement of the transverse stiffness to the string of cavity (increases the eigenfrequencies of first modes)

Cavity Supporting system RAPPEL TITRE PRESENTATION mercredi 28 novembre 2018 Cavity Supporting system Coupler / Vacuum vessel interface Interface  fixed point, compensation of the geometrical defaults {coupler + cavity} Status: Detail designed done A mock-up is under construction by CERN To be tested (Q1/2012)

Cavity Supporting system RAPPEL TITRE PRESENTATION mercredi 28 novembre 2018 Cavity Supporting system Inter-cavity supports Free space for supports Thermal contraction: Longitudinal 4.5 mm Transversal 1.15 mm Max displacement of beam axis = 0.6 mm (transient)  deformation of helium tank Vertical 1.2 mm Blocked 2 supports “rigid”{Coupler+cavity} Status: Detail designed under progress A mock-up is under construction by CERN To be tested (Q1/2012)

Constraints Vacuum Vessel design Constraints due to the assembly method of the string of cavities Pre-Alignment in the clean room required (interconnection bellows) Cavities cleaned and filled with nitrogen (1020mbar)  2 x valves minimum ≈6000 ≈7000 Impact on the vacuum vessel global size

Outer part of the coupler disassembled Vacuum Vessel design Constraints 246 1130 Ø480 Constraints due to the supporting System: Cavities supported and fixed by the lower flange of the double-wall tube of the coupler Size of the power coupler Size of the vacuum gauge minimum Outer part of the coupler disassembled Impact on the vacuum vessel global size Øint1200 min h1500 Coupler Bearing Ports Ø600

Requirements Vacuum vessel design Maintenance aspects : Access to the tuner, the HOM, without decryostating Bearing Ports Maintenance access ports

RAPPEL TITRE PRESENTATION mercredi 28 novembre 2018 Vacuum vessel design Vacuum vessel concepts Cylindrical vacuum vessel (LHC type)  Horizontal cryostating Vacuum vessel with longitudinal aperture Bottom aperture Top apperture  Vertical cryostating

Horizontal cryostating Tooling Studies Vacuum vessel design - Tooling Reference beam path and rolling frame Horizontal cryostating Tooling Studies 3 concepts were studied (8 cavities cryomodule) Assembly procedure dressing of the string of cavities alignment cryostating Rolling reference tool Cantilever tooling Vertical Cryostating Tooling Study 1 concept was studied (8 cavities) All tools were compared (for long and short cryomodule)

Main dimensions Retained concept Aperture concept Vacuum vessel design 1054 1021 Retained concept 7400 Cylindrical vacuum vessel with long top aperture Øint800 Aperture concept e=6mm e=10mm Aperture sealing Prototype (short cryomodule) : polymer seal placed in a groove / (soft) welding Machine cryomodule (long) : welding

Max sliding between cover and flange = 0.65mm Vacuum vessel design Mechanical studies Static analysis Different loading scenarii (linked to the cryostating procedure) VV Weight VV Weight + loading with the string of cavities Vacuum Transport Maximum deflection = 0.65mm Max sliding between cover and flange = 0.65mm Buckling (linear) analysis  The vessel fulfills mechanical requirements (optimization still needed) Construction study A company was consulted to verify the possibility (and cost) of constructing this vacuum vessel. NB: The company (CMI) is currently in charge of 3 vacuum vessels (being 9, 10 and 11m long) for spare connection cryostats for the LHC.  The vessel seems to be feasible (with a 20% higher cost – 1 unit)

Discontinuous shielding: Cryostat components Cold magnetic shielding 2 concepts were studied: Discontinuous shielding: Continuous shield: Need to be mounted before the tuner End cap closures: - lack of space - needs of several apertures (tuner supports) → solution abandoned Alternative solution (CERN): magnetic shield inside the cavity LHe tank → difficulty to manufacture the tank (now for the prototype; could be studied again in the future) Solution retained

Cryostat components Thermal shielding Several concepts were studied (some for a cylindrical vacuum vessel) Favored solution: Continuous shield 2 (or 3) main parts Interfaced on the coupler flange 50K 300K

Cryogenic distribution Cryostat components Cryogenic distribution Diphasic line + filling line + 2K phase separator One component Assembled separately outside the clean room Tightness can be fully tested independently Mounted on the string of cavities during the dressing phase Filling lines Diphasic line 80mm 2K, 31mbar Cooling line Coupler cooling line Coupler cooling line (+boiler) The line is assembled on the couplers during the dressing phase The vapor generator (boiler) is integrated in the string of cavities

Cryogenic distribution Cryostat components Cryogenic distribution

Cryo-module requirements are settled SUMMARY A ½-lenght cryomodule for the full test of 4 β=1 cavities is being design for the CERN Issued from a collaboration between different institutes, it will be as similar as possible to a machine-type cryomodule for a possible SPL machine For now: Cryo-module requirements are settled Most of the conceptual choices are made (cavity supporting system, cryogenic scheme…) Conceptual design study is (nearly) over  review: November 4th 2011 Still needing of some conceptual design work (cryogenic jumper connection, thermal shield) Perspectives: Detailed design is beginning (mid 2012) Test of the cryomodule  2014 SPL on indico: http://indico.cern.ch/categoryDisplay.py?categId=1893 ]

Thank you for your attention Unité mixte de recherche CNRS-IN2P3 Université Paris-Sud 11 91406 Orsay cedex Tél. : +33 1 69 15 73 40 Fax : +33 1 69 15 64 70 http://ipnweb.in2p3.fr