Accord Technique No.2: Contribution au développement du SPL V.Parma (CERN), P.Duthil (CNRS), P.Bosland (CEA) 1.Le SPL 2.Contenu de la contribution 3.Résumé

Present and future accelerators PSB SPS Linac4 LP-SPL PS LHC / sLHC Output energy 160 MeV 1.4 GeV 4 GeV 26 GeV 50 GeV 450 GeV 7 TeV Linac2 50 MeV 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 cm -2 s -1 ) Proton flux / Beam power PS2 Main requirements of PS2 on its injector: RequirementParameterValue 2.2 x ultimate brightness with nominal emittances Injection energy4 GeV Nb. of protons / cycle for LHC (180 bunches) 6.7  Single pulse filling of SPS for fixed target physics Nb. of protons / cycle for SPS fixed target 1.1  Provide all beam time structures for LHC Bunch spacing 25/50/ 75 ns Number of bunches / missing bunches Flexible control of emittance and intensity per bunch  X,Y /  L / N b PresentFuture sLHC Courtesy of R.Garoby

Site layout SPS PS2 SPL Linac4 PS ISOLDE sLHC Courtesy of R.Garoby

SC-linac (160 MeV  4 GeV) with ejection at intermediate energy Length: ~430 m Medium  cryomodule High  cryomodules Ejection 9 x 6  =0.65 cavities 5 x 8  =1 cavities 14 x 8  =1 cavities TT6 to ISOLDE Debunchers To PS2 High  cryomodules From Linac4 0 m0.16 GeV110 m0.73 GeV186 m1.4 GeV427 m4 GeV LP-SPL- Block diagram sLHC Courtesy of R.Garoby

L’Etude SPL: Objectif de l’étude SPL: Préparation d’un rapport d’étude (Conceptual Design Report) et estimation du coût de projet  mai 2012 En soutient à cette étude: Développement et réalisation d’un cryo-module prototype a β=1. La contribution de la France: CNRS/IN2P3: – l'étude du cryostat et de l’intégration des composants du cryo-module – la réalisation des composants du cryostat pour le cryo-module prototype. CEA: – l'étude et la réalisation de deux enceintes hélium des cavités supraconductrices pour un cryo-module prototype – l’étude et la réalisation de l’outillage d’assemblage du cryo-module prototype.

Planning cryo-module prototype Acc. Tech.n°2 CNRS Participation CNRS/CEA Acc. Tech. n°2 CEA Acc. Tech.n°2 CEA (enceintes hélium) Aujourd’hui

WP 2.1: Etude et réalisation cryostat Work package number 2.1Work package title Cryostat Design & Integration, cavity support/guiding design. Procurement of equipment for prototype. Reference institute CNRS CNRS contactP.Duthil CERN contactV.Parma Time span StartEnd November 2009December 2011 Allocated human resources 54 man.months Allocated financial resources 155 K€ Indicative personnel profile (man.months)Indicative financial profile EngineerDesignerTechnicianK€ Total29187Total155 Milestones and Deliverables DateDescription December 2009Conceptual design of beta=1 cryomodule (by CERN), with input from CNRS/CEA July 2010 Detailed Design Review. Detailed CAD models and detailed design engineering studies by CNRS finished. September 2010Review of tender files for procurement. Tender documents available. December 2010Contract orders signed by CNRS. December 2011 Complete set of components, accompanied by relevant documentation, available for starting assembly of prototype cryo-module.

WP 2.1: Etude et réalisation cryostat Objectifs : – Concevoir (étude mécanique) – Réaliser et Fournir (appel d’offre, suivi de fabrication) – Un cryostat prototype accueillant 8 cavités SC RF β=1 1 doublet de quadripôles SC – Le système de support et de guidage Cavités-aimant / cryostat (example cryo-module XFEL) Difficultés à prévoir: Cryostat : dernier maillon de la chaine : tout doit être défini en amont Gestion des interfaces : – Définition – Centralisation/diffusion de l’information (CERN)

WP 2.2 Etude et réalisation enceintes hélium Work package number2.2Work package title Design and procurement of 2 helium vessels for cavities β=1 Reference institute CEA CEA contactS.Chel CERN contactW.Weingarten Time span StartEnd January 2009December 2011 Allocated human resources9.6 man.months Allocated financial resources 50 K€ Indicative personnel profile (man.months)Indicative financial profile EngineerDesignerTechnicianK€ Total4.8 Total50 Milestones and Deliverables DateDescription December 2009 Detailed Design Review. Detailed CAD models and detailed design engineering studies by CEA finished. February 2010Review of tender files for procurement. Tender documents available. June 2010Contract adjudication by CEA. December 2011 Delivery to CERN of 2 cavities β=1, housed in their helium vessel, ready for clean-room assembly of a string of cavities for the cryo- module prototype. The delivery shall include relevant documentation.

He vessel for 2 cavities at b=1 (Cavity design in progress in the framework of EuCard) CEA proposed choice of the material: titanium contraction coefficient of Ti close to Nb’s: – helps to prevent cavity deformation during cooldown or warm up – helps to manage piezo preload direct weldability between Ti, Nb and NbTi Ti widely used : X-FEL, SNS,... Stainless steel vessel requires SS rings to be brazed to the cavity during cavity fabrication (endgroup, fundamental power coupler side), therefore limits high temperature treatements to 650°C. OK for Q-disease, but no high temperature annealing higher risk of Nb contamination with SS tank (e-beam welding close to Nb/SS brazed junctions)

Interfaces Piezo tuner mounted on the helium vessel of the HIPPI beta 0.47 cavity B (stainless steel) piezo side with tuner Two main options: Fundamental power coupler port inside/outside the He vessel. Upcoming tests with HIPPI cavity in SLHC-PP program will give information about the increased thermal stability of a cooled FPC port. Inner or outer magnetic shielding

WP 2.3 Etude et réalisation outillage assemblage cryo-module Work package number2.3Work package title Design & procurement of cryostat assembly tooling Reference institute CEA CEA contactS.Chel CERN contactV.Parma Time span StartEnd January 2010December 2011 Allocated human resources 19.2 man.months Allocated financial resources 62 K€ Indicative personnel profile (FTE-y)Indicative financial profile EngineerDesignerTechnicianK€ Total9.6 Total62 Milestones and Deliverables DateDescription June 2010 Detailed Design Review of assembly tooling. CAD models and engineering design studies by CEA finished. September 2010Review of tender files for procurement. Tender documents available. December 2010Contract adjudication by CEA. June 2011 Assembly tooling components delivered to CERN, including relevant documentation and safety files. December 2011Assembly tooling installed and operational at CERN.

Résumé L’étude conceptuelle du cryostat du cryo-module est en cours au CERN. – Définition du coupleur de puissance (solution HIPPI modifie’) est essentiel pour avancer dans ce travail  nécessité de collaboration étroite entre les 3 instituts – Fin prévue à la fin 2009, condition préalable au début du WP2.1. WP 2.1. L’étude de détail du cryo-module débutera en 2010 WP 2.2. L’étude des enceintes hélium peut (doit!) avancer et terminer fin 2009 WP 2.3. L’étude des outillages d’assemblage cryo-module débutera en 2010