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Status and Plans of the SPL study

Overview of recent progress, planning, new research areas, and achievements in Linac4 infrastructure and RFQ beam accelerator at CERN. Details on Linac4 masterplan, SPL R&D organization, and highlights since SLHiPP-2.

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Status and Plans of the SPL study

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  1. Status and Plans of the SPL study R. Garoby – 17 April, 2013 3rd Open Collaboration meeting on Superconducting Linacs for High Power Proton Beams (SLHiPP-3) April 17-18, 2013 Louvain-la-Neuve

  2. OUTLINE • Recent progress • Planning • New subjects of investigation • Final word F

  3. Progress with Linac4 Infrastructure • Impressive amount of work in 2011/12 • Electrical distribution and CV infrastructure completed • Cabling completed: all cables ready to be connected • Waveguides and circulators installed • Installation of klystrons progressing (50% achieved) • Installation of modulators starting soon 3 SLHiPP-3

  4. RFQ and 3 MeV test place are in operation! The RFQ not only focuses and accelerates the beam as required, but so far it does it in a stable, reliable and reproducible way! 4

  5. 3 MeV measurements ~11.9 mA on BCT.L4L04040 (after RFQ, straight line)  ~75% transmission 16.2mA on BCT.L4L01160 (before RFQ) BCT vs BPM crosscheck - F Roncarolo ~11.2 mA on BCT.L4L05010 (after RFQ, spectrometer line)  Most of the particles at the RFQ exit are at the right energy 5

  6. Linac4 – New Masterplan 2013/16 Masterplan, adapted to limited availability of resources during Long Shutdown 1 (2013/14) Transfer 3 MeV to Linac4 tunnel Start high-energycommissioning (12 MeV) End high-energycommissioning (160 MeV) 1 year reliability run Ready for 50 MeV protons as backup to Linac2 Ready for connection Options for connection to the PS Booster: a) Long Shutdown 2 (2018?) or b) intermediate length shut-down after end 2016 6

  7. Organization of the SPL R&D at CERN Guideline «Project-like» structure aimedat meeting the objectives of the HP-SPL R&D: • Building and testing a prototype cryomodule with 4 cavities • Updating CERN infrastructure and competence in superconducting RF technology • Preparingsubmission of future subjects of R&D [design and construction of a full-size cryomodule, high power RF sources, HIPIMS (High Power Impulse Magnetron Sputtering)…] WorkUnits • Design, construction and test of the prototype cryomodule (Leader: V. Parma) • Components: Cryomodule, Cavities, RF items (Couplers, tuners, …), cryogenicsequipment… • Assembly (withadequatetools): cavities string in clean room, inclusion in cryomodule • Tests: cavities in vertical cryostat, assembledcryomodule in bunker. • Upgrade of the SM18 infrastructure (Leader: O. Brunner) • HP water rinsing system and upgraded clean roon • Cryogenics for efficient operationat 2K • High power RF at 704 MHz (klystron, modulator, high power distribution) • LowLevel RF and controls • SC RF cavitiestechnology (Leader: E. Ciapala) • Fabrication and processing • Test, diagnostics and analysis 7

  8. Highlightssince SLHiPP-2 (1/5) - EVENTS - Contribution to the briefing book of theEuropean Strategy Group [ http://europeanstrategygroup.web.cern.ch/EuropeanStrategyGroup/ ] “R&D related to the High Power Superconducting Proton Linac (HP-SPL)“ https://indico.cern.ch/abstractDisplay.py/getAttachedFile?abstractId=161&resId=2&confId=175067 - 5-8 November 2012: TTC12 (JLab) [http://www.jlab.org/conferences/ttc2012/index.html] - 6 December 2012: SPL seminar 2012 (CERN) [http://indico.cern.ch/conferenceDisplay.py?confId=216370] 8

  9. Highlightssince SLHiPP-2 (2/5) - CRYOMODULE Supporting system mock-up: All components ordered / vacuumvessel ready Interfaces welded to double tubes Cool down and first cold tests: first half of 2013 Cold magnetic shield Cold magnetic shield 9

  10. Highlightssince SLHiPP-2 (3/5) SM18 & CRYOMODULE INTEGRATION RF distribution Cryomodule integration in the bunker Study by P. Martinez Yanez and B.Riffaud Valve box design from SM18 Vacuum vessel Cryo-module Valve box to CM Thermal shield Cryo line interface SC RF diagnostics: Quench detection with OSTs Optical inspection bench Cleanroom new layout High Pressure Rinsing 10

  11. Highlightssince SLHiPP-2 (4/5) CAVITIES FABRICATION 2 Cu 5-cell cavities β=1 (prototypes) fabricated at CERN: Tolearnwiththefabricationprocess Topractice RF measurements Forsurfacetreatmenttests 5 Nb5-cell cavities β=1 ordered in industry (RI) Single cell test cavity e-polished and RF measured Q0 1010 109 108 Preparation for fabrication of an Nb 5-cell cavity at CERN in 2013: Successfultests of Nb spinning & Nb brazingon Steel E-beamweldingtestswith new machine Accel. gradient (MV/m) SS SS Cu Cu New e-beam welding machine Spinning tests Nb Nb 11

  12. Highlightssince SLHiPP-2 (5/5) RF COUPLERS DEVELOPMENT Tuners (CEA design & fabrication): - 8 tuners delivered RF couplers tested at high power Coaxial disk window : • TW : 1000 kW 2 ms 20 Hz • SW : 1000 kW 1.5 ms 4 Hz … and how to make it better Air inlet through WG short circuit PEEK Screen all around ceramic Cylindrical window : • TW : 1000 kW 2 ms 20 Hz • SW : 550 kW 500 us 8 Hz 12

  13. OUTLINE • Recent progress • Planning • New subjects of investigation • Final word F

  14. Status of SPL R&D (1/2) • Construction of 4 cavities in industry • In progress (full delivery in July 2013) • Construction of one additional cavity at CERN • In progress (completion in 2013) • Test of single cell cavities from CEA and INFN • Done • Measurements and tests with dumbbell copper cavity • Done • Upgrade of cryogenics and water rinsing facility in SM18 • Planned in 2013 (manpower and material budget) • Upgrade of clean room in SM18 • Planned in early 2014 (manpower and material budget) • 704 MHz klystron for SM18 • In fabrication (delivery in 2013) • Klystron modulator from industry (ESS) • In fabrication (delivery in 2013) • Preparation of 704 MHz RF components (Low Level and High Power) for SM18 • In progress More detailsduringthis meeting 14

  15. Status of SPL R&D (2/2) - Construction & test of High power RF couplers • Correctly Cu-platted tubes available / New assembly could not take place in DESY – problems with assembly and failed test in Saclay… • Completion delayed to the end of 2013 - Specification & construction of tuners and He tanks (CEA): Delayed - LP-SPL CDR (jointly with PS2): In progress! - Meetings: • 5-8 August 2013: AccApp13 Workshop (Bruges) [http://www.accapp13.org/] • 17-24 August 2013: NuFact’13 Workshop (Beijing) [http://nufact2013.ihep.ac.cn/index.html] • 23-27 September 2013: SRF conference (Paris) [http://www.srf2013.fr/] • 28-29 November 2013: SLHiPP-4 (CERN) More detailsduringthis meeting Proposal 15

  16. Planning of cavities fabrication (RI) 8 monthsdelaywrtprevision… 16

  17. Overall planning Conflictwith HIE-ISOLDE… ~1 yeardelay… 17

  18. OUTLINE • Recent progress • Planning • New subjects of investigation • Final word F

  19. High Power IOT development Collaboration ESS/CERN-SPL under discussion CERN 801 MHz 60 kW CW IOT amplifier Draft specifications IVEC’13 paper 19

  20. «EUROSB» ERC Synergy Grant Proposal Purpose: progress in design of few GeV Linac-based Proton Driver 20

  21. OUTLINE • Recent progress • Planning • New subject of investigation • Final word F

  22. (1/2) 22

  23. (2/2) 23

  24. Future (beyond what has been shown before)… • 2013-2014: • Studies for proton drivers in future neutrino facilities (in the context of LAGUNA-LBNO): • LP-SPL as injector of a 2 MW / 30-50 GeV synchrotron • HP-SPL with an accumulator as a 5 MW / 5 GeV proton source • 2014-2016: • Continuation of Proton Driver study within EUROSB (if supported by the EC) • Branching point for defining the continuation of the R&D inside CERN • Updated Scientific Strategy of CERN resulting from the recommendations of the European Strategy Group • Key ingredients for continuation: • Physics! Based on the results of LHC and of the on-going n experiments. • Strength / weaknesses of alternative options (Japanese initiative for an ILC in Japan …) • Strength / weaknesses of proposals for nfacilities • Strength / weaknesses of the SPL-related applications (Proton drivers for n facilities, Injectors for LHC-related future beyond HL-LHC, LHeC, LEP-III …) • CERN strategy for sc RF technology • Politics and collaborations… 24

  25. THANK YOU FOR YOUR ATTENTION!

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