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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

b<1 Cryomodules & Cost Estimates

Giorgio Apollinari

March 15th - 17th , 2005


Outline
Outline

  • Description of the System

  • Elliptical Cavities and CryoModules

  • Spoke Cavities and Cryomodules

  • R&D Steps

  • Conclusions


Description of the system

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


Description of the system1
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


Technical solutions
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


Cryomodules
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


Technical solutions1
Technical Solutions

  • Separate Vacuum

  • Efficient, top loading

  • Good alignment capability

Positive Ion Injector Cryomodule


Anl ria cryomodule design
ANL/RIA Cryomodule Design

Clean Assembly suspended from

Top Plate

Clean Room String Assembly

Assembly lowered in vacuum vessel


Technical solutions2
Technical Solutions

  • FNAL idea for Spoke Cavities Cryostat


Spoke cavities cryostats
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


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


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


Elliptical b=0.47, 0.61, 0.81

  • Build on FNAL/SNS/JLAB/MSU experience and collaboration to develop b<1 cavities.


Cryomodule cost exercise
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




Examples of rfq responses
Examples of RFQ Responses

  • b=1 Cavities

  • Cryostats


Cost estimate for b 1 cryomodules
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




Drawings americanization1
Drawings “Americanization”

  • Knowledge and control of technical issues.

  • Allows for “value engineering”.


R d timescale
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


Conclusions
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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