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SPL development status

SPL development status. OUTLINE 1. Introduction 2. Up-to-date characteristics 3. On-going work 4. Planning and needs. SPL Working Group. 1. Introduction. CERN baseline scenario for a Neutrino Factory. Other applications of the proton driver. Approved physics experiments

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SPL development status

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  1. SPL development status OUTLINE 1. Introduction 2. Up-to-date characteristics 3. On-going work 4. Planning and needs 1

  2. SPL Working Group 2

  3. 1. Introduction CERN baseline scenario for a Neutrino Factory 3

  4. Other applications of the proton driver • Approved physics experiments • CERN Neutrinos to Gran Sasso (CNGS): increased flux (~ ´ 2) • Anti-proton Decelerator: increased flux • Neutrons Time Of Flight (TOF) experiments: increased flux • ISOLDE: increased flux, higher duty factor, multiple energies... • LHC: faster filling time, increased operational margin... • Future potential users • “Conventional” neutrino beam from the SPL “super-beam” • Second generation ISOLDE facility (“EURISOL” -like) • ??? 4

  5. 2. Up-to-date SPL characteristics H- source, 25 mA 14% duty cycle CCDTL new SC cavities: b=0.52,0.7,0.8 Fast chopper (2 ns transition time) • RF system: • freq.: 352 MHz • ampli.: tetrodes and LEP klystrons 5

  6. Improvements w.r.t. the reference design • Improved transitions between sections  better beam stability • Doubled period length above 1.1 GeV  save 25 doublets, 8m, 3 MCHF • Improved error studies 100% beam radius < 20 mm,even for large error case (30 %) quad. radius reduced from 100 mm to 60 mm,(17rms)  save 2 - 3 MCHF • Reduced longitudinal emittance: 0.6  0.3 ºMeV improved design of the transfer line (drift length 230  175 m, bunch length 180  130 ps) • Use of beta=0.8 cavities up to the highest energy shorter tunnel (- 100 m), less cavities per klystron, better control of mechanical resonances 6

  7. Revised SPL beam specifications 7

  8. Accumulator-Compressor scheme for a Neutrino Factory 8

  9. Proton beam characteristics & influence on the rest of the complex p production Cycling rate of all the facility m burst length Distance between m bunches 9

  10. SPL sequencing and beam delivery Fast deflection kickers 10

  11. 3. On-going work 11

  12. Study of RT structures for the SPL front-end bl Alvarez Drift Tube Linac unsurpassable <20 MeV good but expensive for 20-120 MeV bl Cell Coupled Drift Tube Linac attractive solution for 20-150 MeV (a cold model is being designed) bl/2 Coupled-Cell Cavity (LEP1) better efficiency >110 MeV quadrupole quadrupole The final choice will depend on preferred apertures, RT final energy, etc. 12

  13. Intensity increase programme: possible location of the SPL front-end in the PS South Hall Þ´ 1.8 the flux to CNGS (provided upgrades are made to PSB, PS & SPS…) Þ “cheap” installation, giving benefits from SPL related hardware before the full machine is operational & shortening the final setting-up 13

  14. 4. Final comments Planning (guesses ...) and consequences • 2009: SPL commissioning with beam • 2005: Start of construction (civil engineering, preparation and test of SC cavities in SM18, etc.) • beginning of 2004: land acquisition and authorisation of construction • end 2003: decision Þ detailed design report for 2004 Þ increase the design effort at CERN & in interested laboratories by an order of magnitude before 2004 ! 14

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