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b <1 Cryomodules & Cost Estimates

b <1 Cryomodules & Cost Estimates. Giorgio Apollinari March 15 th - 17 th , 2005. Outline. Description of the System Elliptical Cavities and CryoModules Spoke Cavities and Cryomodules R&D Steps Conclusions. “. PULSED RIA. ”. Single. Front End. Linac. Modulator. 3 MW. JPARC.

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b <1 Cryomodules & Cost Estimates

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  1. b<1 Cryomodules & Cost Estimates Giorgio Apollinari March 15th - 17th , 2005

  2. Outline • Description of the System • Elliptical Cavities and CryoModules • Spoke Cavities and Cryomodules • R&D Steps • Conclusions

  3. “ PULSED RIA ” Single Front End Linac Modulator 3 MW JPARC Multi - Cavity Fanout at 10 - 50 kW/cavity Klystron Phase and Amplitude Control w/ Ferrite Tuners 325 MHz 0 - 110 MeV H - RFQ MEBT RTSR SSR DSR DSR b<1 “TESLA” LINAC 10 MW Modulator Modulator Modulator TESLA Multi - Beam Elliptical Option Elliptical Option Klystrons 1300 MHz 0.1 - 1.2 GeV 48 Cavites / Klystron 2 Klystrons ? b =.47 =.47 ? b =.47 =.47 b ? =.61 =.61 ? b =.61 =.61 b ? =.61 =.61 ? b =.61 =.61 b =.81 b =.81 b =.81 b =.81 b =.81 b =.81 96 Elliptical Cavities or or … … 325 MHz Spoke Resonators 325 MHz Spoke Resonators 8 Cavites / Cryomodule 12 Cryomodules Description of the System • Increase H- energy from E=15 MeV to E=1200 MeV. • Multiple geometrical b’s: 0.21, 0.4, ( 0.47, 0.61 for elliptical cavities or 0.61 for spoke cavities) and 0.81 • Parameter List V8 Cavity Accelerating Gradient (Elliptical Cavity Option for Beta=0.47 and 0.61) Epeak = 52 MV/m, Phi_Synch = -30 to -15 degrees 30 Accelerating Beta = 1.00 Gradient Eacc 25 Beta = 0.81 Eacc *TTF*Cos(f) Beta 20 =0.61 Gradient (MeV/m) Beta 0.47 15 10 5 0 1 51 101 151 201 251 301 351 Elliptical Cavity Number

  4. Description of the System • 5 (or 6) different cryomodules, ~10 m long. • Solenoidal and Quadrupole focusing. • Transition from 325 MHz to 1300 MHz • 110 or 400 MeV ? • Triple Spoke vs. Elliptical Cavities

  5. Technical Solutions • Spoke Cavities and CryoModules (see also K.Shepard talk) • Why Spokes • Fewer types& higher operating T (4 K) • Improved beam quality (increased longitudinal acceptance) • Superior mechanical stability for b<0.6 • Technology developed for RIA/APT

  6. Cryomodules b=0.21 16 Cavities/Cryomodule – 1 Cryomodule 16 focusing Solenoids/Cryomodule b=0.4 14 Cavities/Cryomodule – 2 Cryomodules 7 focusing Solenoids/Cryomodule Open Technical Choice b=0.61 6 Cavities/Cryomodule – 7 Cryomodules 6 focusing quads/Cryomodule

  7. Technical Solutions • Separate Vacuum • Efficient, top loading • Good alignment capability Positive Ion Injector Cryomodule

  8. ANL/RIA Cryomodule Design Clean Assembly suspended from Top Plate Clean Room String Assembly Assembly lowered in vacuum vessel

  9. Technical Solutions • FNAL idea for Spoke Cavities Cryostat

  10. Spoke Cavities Cryostats • Reality Checks • Following APT/RIA experience for: • Heat Loads • Microphonics/Vibration/Displacement problems • Alignment & Cold-down/Warm-up Displacement • R&D Efforts • Single and Double Spoke Cryostats Prototypes • Large numbers of Cavities & Focusing solenoids in single cryostat

  11. Elliptical b=0.47, 0.61, 0.81 • Cryostat based on TESLA design • 8 cavities, operating at 2K • Focusing cold quads • 9 quads in b=0.47 (40 T/m) • 5 quads in b=0.61 (33 T/m) • 3 quads in b=0.81 (5 T/m) • 1 quad in b=1 (3 T/m) • Expected Heat Loads • 5 W in 2 K • ~20 W in 4.5 K • ~200 W in 50 K

  12. Elliptical b=0.47, 0.61, 0.81 b=0.47 8 Cavities, 6 cells/cavity 9 focusing quads Open Technical Choice b=0.61 8 Cavities, 6 cells/cavity 5 focusing quads b=0.81 8 Cavities, 8 cells/cavity 3 focusing quads b=1.0 8 Cavities, 9 cells/cavity 1 focusing quad

  13. Elliptical b=0.47, 0.61, 0.81 • Build on FNAL/SNS/JLAB/MSU experience and collaboration to develop b<1 cavities.

  14. Cryomodule Cost exercise • Why ? • Provide “more realistic” inputs on cryomodule costs, including low quantities and prototype costs • Understand our preparedness to use “value engineering”. • How ? • Use un-modified existing drawing packages • INFN/DESY/TESLA for CryoIII and b=1 elliptical cavities • APT/RIA for modified Double Spokes Cavities • Submit Request For Quotations (RFQs) to various US and European companies for prototype (1), pre-production (4) and production (~50) quantities. • Focused on high-value items: • Elliptical Cavities, Cryostats, Double Spoke Cavities • Notable exception: Power Couplers for which we have an unsolicited V.I. From CPI • FY04 Dollars

  15. RFQ Responses

  16. RFQ Feedbacks

  17. Examples of RFQ Responses • b=1 Cavities • Cryostats

  18. Cost Estimate for b=1 Cryomodules • Approximately 55% of cost estimate based on RFQs • Most notable exception: Power Couplers (VI) • EE based on TESLA/SNS experience

  19. Total Cost Estimate • FY04 $

  20. Drawings “Americanization”

  21. Drawings “Americanization” • Knowledge and control of technical issues. • Allows for “value engineering”.

  22. R&D Timescale • Tasks • Build on ILC synergy to develop, design and prototype b<1 cryomodules • Starting points: TESLA, SNS, etc. • Develop, design and prototype Spoke Cavities Cryomodules • Milestones • Spoke Prototype Cryomodule by FY2006 • US-built Elliptical Cryomodule by FY2006

  23. CONCLUSIONS • PD Cold Linac is Technically feasible • PD Cold Linac is Financially feasible • The Risks are Understood • The R&D planned will Reduce the Risk • We have a Plan for what to do next

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