Status and Perspectives of the SPL R&D R. Garoby – 6/12/2012 SPL Seminar 2012 December 6-7, 2012 CERN

Motivation Motivation Resources & Planning 2012 Achievements Future

Preserve the possibility of new injectors in the future (HE-LHC…) Motivation (1/7) PSB SPS Linac4 LP-SPL PS LHC / HE-LHC 160 MeV 1.4 GeV 4 GeV 26 GeV 50 GeV 450 GeV 7 TeV Linac2 50 MeV Proton flux / Beam power PS2 Present Optional Future LP-SPL: Low Power-Superconducting Proton Linac PS2:High Energy PS (~ 5 to 50 GeV – 0.3 Hz) HE-LHC: “High Energy” LHC (  14 TeV/ring) PS2 SPL LINAC4 SPS PS R.G. 36/12/2012

Options for neutrino physics (Low energy Superbeam) Accumulation of beam from the High Power SPL in a fixed energy Accumulator (4-5 GeV, 4MW beam power). Fast ejection onto target(s) Motivation (2/7) R.G. 46/12/2012 Studied in LAGUNA - to be continued in ERC Synergy

Physics Performance (CPV) (Enrique Fernantez et al. – Nov. 2012) ESS SB Precision on δ CP R.G. 56/12/2012 SPL is highly competitive… Motivation (3/7)

Options for neutrino physics ( Factory) Accumulation of beam from the High Power SPL in a fixed energy Accumulator (4-5 GeV, 4MW beam power). Bunch compression («rotation») in a separate Compressor ring Fast ejection of few (3-6) short (2 ns) bunches to target Motivation (4/7) R.G. 66/12/2012 Studied in EuCARD and IDS-NF

Options for neutrino physics (High energy Superbeam to Pyhasalmi) LP-SPL as 4 GeV injector of a new High Power 50 GeV synchrotron Motivation (5/7) R.G. 76/12/2012 Studied in LAGUNA - LBNO

Next generation Radioactive Ion Beam Facility (~EURISOL) TARGETS RADIOACTIVE IONS LINAC EURISOL EXPERIMENTAL HALLS ISOLDE OR EURISOL HIGH ENERGY EXPERIMENTAL HALL TRANSFER LINES SPL to EURISOL TRANSFER LINE SPL to ISOLDE Motivation (6/7) R.G. 86/12/2012

Update of CERN competencies in superconducting RF Upgrade of CERN infrastructure for superconducting RF (SM18 clean room, High Power RF, High Pressure Water Rinsing facility, Diagnostics for SC RF, New e-beam welding machine, Electropolishing installation, etc.) Synergy with other applications at CERN (LHeC electron linac, LEP-3… ) as well as outside of CERN [ESS, ADS (MYRRHA)…] R.G. 96/12/2012 Motivation (7/7)

Motivation Resources & Planning Resources & Planning 2012 Achievements Future

Resources R & D for a High Power SPL formally supported at CERN in view of multiple future potential applications  ~1.7 MCHF and 6 FTEs / year Collaboration with ESS  Fellows and procurement of klystron modulator for SM18  Joint investigation of 1 MW IOT (under discussion) French in-kind contribution  Tuners, Helium tanks, use of Saclay 704 MHz high power test place… EC-supported programmes EuCARD (WP10)  Development and test of beta=1 (CEA) and beta=0.65 (IN2P3) 5 cells cavities CRISP (WP4)  Joint work with ESS and DESY  EC-supported manpower for upgrading and exploiting the SM18 test place LAGUNA-LBNO  EC-supported fellow for studying proton drivers at CERN using LP- or HP-SPL Synergy grant of the ERC (to be submitted in January 2013)  EC-supported fellow(s) for studying HP-SPL and accumulator DOE-supported programme BNL  Development and test of a  =1 cavity R.G. 116/12/2012 New

SPL R&D Planning Preparation of SM18 infrastructure (cryogenics, RF, clean-room) Cavities production Cavities processing/RF testing RF couplers Clean room assembly of string Cryomodule (& assembly tooling) design Cryomodule fabrication Cryomodule assembly Start cryomodule RF testing ~done R.G. 126/12/2012

Motivation Resources & Planning 2012 Achievements 2012 Achievements Future

Cryomodule Supporting system mock-up: All components ordered / vacuum vessel ready Interfaces welded to double tubes Cool down and first cold tests: first months of 2013 Cold magnetic shield R.G. 146/12/2012 More details during this meeting

SM18 & cryomodule integration Valve box RF distribution Cryo line interface Cryo-module Study by P. Martinez Yanez and B.Riffaud Cryomodule integration in the bunker to CM Vacuum vessel Thermal shield Valve box design from SM18 Cleanroom new layout High Pressure Rinsing SC RF diagnostics: Quench detection with OSTs Optical inspection bench R.G. 156/12/2012 More details during this meeting

Cavities fabrication R.G. 166/12/ Cu 5-cell cavities β=1 (prototypes) fabricated at CERN: To learn with the fabrication process To practice RF measurements For surface treatment tests 5 Nb 5-cell cavities β=1 ordered in industry (RI) Single cell test cavity e-polished and RF measured Accel. gradient (MV/m) Q Preparation for fabrication of an Nb 5-cell cavity at CERN in 2013: Successful tests of Nb spinning & Nb brazing on Steel E-beam welding tests with new machine New e-beam welding machine SS Cu Nb SS Cu Nb Spinning tests More details during this meeting

Cavity equipment RF couplers tested at high power Tuners (CEA design & fabrication): - 8 tuners delivered Cylindrical window : – TW : 1000 kW 2 ms 20 Hz – SW : 550 kW 500 us 8 Hz Coaxial disk window : – TW : 1000 kW 2 ms 20 Hz – SW : 1000 kW 1.5 ms 4 Hz Air inlet through WG short circuit PEEK Screen all around ceramic … and how to make it better R.G. 176/12/2012 More details during this meeting

R.G. 186/12/2012 Other issues… 2 nd Collaboration Meeting on Superconducting Linacs for High Power Proton beams (SLHiPP-2) – Catania – May 3 & 4, 2012 [ ] TTC Meeting – JLab – November 5 - 8, 2012 [[ ] Contribution to the briefing book of the European Strategy Group [ ] “R&D related to the High Power Superconducting Proton Linac (HP-SPL)“

Motivation Resources & Planning 2012 Achievements Future Future

Future (beyond what has been shown before)… Branching point  Recommendations of the European Strategy Group in January 2013  Updated Scientific Strategy of CERN: Integration in 2013 MTP (submitted to Council in June) Start of implementation in 2014? Key ingredients -Physics! Based on the results of LHC and of the on-going experiments. -Strength / weaknesses of competing options (Linear collider …) -Strength / weaknesses of the SPL-related applications (Proton drivers for facilities, Injectors for LHC- related future beyond HL-LHC, LHeC, LEP-III …) -CERN strategy for sc RF technology -Opportunities, politics and collaborations… Main meetings  SLHiPP-3, Louvain-la-Neuve (Belgium), April 17 & 18, 2013  SLHiPP-4, CERN, November 2013 R.G. 206/12/2012