SRF Cryomodule Assembly Facility Plans

Tug Arkan

AAC, May 10-12, 2005

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Outline

Introduction Cryomodule Assembly Workflow Infrastructure Plans Procurement Plans Summary

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Introduction

A plan is being developed to assemble 1.3 GHz Elliptical cryomodules at Fermilab.

Current plan involves two1.3 GHz (β=1) cryomodules to be assembled in FY06 and FY07.

High power RF and Beam testing of these cryomodules will be done on the Fermilab site in the proposed Meson Lab test facility (HPTF)

MP9 building will be used to setup the infrastructure to assemble these cryomodules.

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Cryomodule Assembly Workflow Plans in FY06 & FY07

Assumptions for the assembly of two 1.3 GHz Elliptical cryomodules in FY06 & FY07: (R&D production rate)

SRF bare cavities are fabricated in industry. (Form/machine parts, electron beam welding)

Cavities are processed (tuned for field flatness, baked, chemical etched {BCP and/or electro-polished}, high pressure water rinsed and vertical dewar tested).

Cavities are outfitted with helium vessel and input power coupler and further dressed (tuner, magnetic shielding) for the horizontal dewar test.

It is assumed that these steps (processing & dressing) are carried out elsewhere (collaborating laboratories, universities).

After passing horizontal dewar test, the cavity with helium vessel and cold part of the input coupler is shipped sealed to the MP9 facility.

The sealed cavities with cold input coupler are received at the MP9 facility for incorporation into cryomodules. 8 dressed cavities are assembled into a string at MP9 facility clean rooms. The cavity string is then assembled into cold mass. Cold mass is then inserted into vacuum vessel and the cryomodule assembly is complete.

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Receive dressed Cavities

Receive peripheral (vacuum vessel, cryogenic pipes, super-insulation

etc.) Cryomodule Parts

Assemble dressed Cavities to form a

String in the Cavity String

Assembly Area (Clean Room)

Work Flow at MP9 FacilityWork Flow at MP9 Facility

Install String Assembly to Cold Mass in the Cold Mass

Assembly Area

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Cryomodule Testing at HPTF

Ship completed cryomodules to

HPTF

Install the String assembly with the cold mass into the Vacuum vessel in the Vacuum Vessel

Assembly area

Cavity Repair

fail

Cryomodule Repair (assumes one or more cavities must be replaced)

-Disassemble the module

-Disassemble the string in the Clean Room

-Install a new dressed cavity to the string

pass

Cyomodule production is successful

Send the Cryomodule

back for repair

Work Flow at MP9 FacilityWork Flow at MP9 Facility

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Infrastructure Plans at MP91.3 GHz Elliptical Cryomodules Assembly Infrastructure at MP9 in FY06 & FY07

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Cryomodule Assembly Workflow Model for Small Scale Mass Production Rate Assumptions for a production rate of 1~2 cryomodules per month: (small

scale mass production rate) SRF bare cavities are fabricated in industry. (Form/machine parts, electron beam welding).

The bare cavities arrive to FNAL. Cavities are processed (tuned for field flatness, baked, chemical etched {BCP and/or

electro-polished}, high pressure water rinsed and vertical dewar tested) at Fermilab. Cavities are outfitted with helium vessel and input power coupler and further dressed (tuner,

magnetic shielding) for the horizontal dewar test at Fermilab. After passing the horizontal dewar test, the cavity with helium vessel and cold part of the

input coupler is shipped sealed to the MP9 facility. The sealed cavities with cold input coupler are received at the MP9 facility for incorporation

into strings. 8 dressed cavities are assembled into a string at MP9 facility clean rooms. The cavity string is then transported to another assembly facility to be assembled into cold

mass. Cold mass is then inserted into vacuum vessel and the cryomodule assembly will be completed. (1~2 cryomodules per month in two ~ three cold mass and vacuum vessel assembly lines.

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Receive bare Cavities

Receive peripheral parts to dress cavities & assemble a string

Chemical Etch Cavity (BCP and/or Electropolish)

Dress cavity-Weld Helium vessel

-Install input power coupler-Assemble Tuner,

-Assemble magnetic shielding

Assemble Dressed Cavities to form a String in the Cavity

String Assembly Area (Clean Room)

Horizontal Dewar Test Dressed

CavityPass

Pass

FailHigh Pressure Water Rinse (HPWR) Cavity

Vertical Dewar Test Processed Cavity

Fail

Transport String Assembly to

another Facility

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Receive String Assembly

Receive peripheral (vacuum vessel, cryogenic pipes, super-

insulation etc.) Cryomodule Parts

Install String Assembly to Cold Mass in the Cold Mass

Assembly Area

Ship completed cryomodules to HPTF

Install the String assembly with the cold mass to the Vacuum vessel in the Vacuum Vessel

Assembly area

Cryomodule Testing at HPTF

Cryomodule Repair (assumes one or more cavities must be replaced)

-Disassemble the module

-Disassemble the string in the Clean Room

-Install a new dressed cavity to the string

Fail

Send the Cryomodule back for repair

Pass

Cyomodule production is successful

Cavity Repair

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MP9 Building & MP9 Building & Meson AreaMeson Area

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MP9 Building MP9 Building inside viewsinside views

Beam Separator work at MP9 will be completed by the end of November 2006

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Procurement Plans

FY05: Elliptical cavity string assembly clean

rooms 1.3 GHz elliptical cryomodules cold mass

and vacuum vessel assembly fixtures FY06:

Elliptical cavities string assembly fixtures Clean room equipment Portable clean rooms Miscellaneous fixtures

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Summary

In FY06 and FY07, MP9 building will be used for the infrastructure to assemble two 1.3 GHz (β = 1) elliptical cryomodules.

3~4 FTE’s are needed to assemble the strings in the cavity string assembly clean rooms.

6~8 FTE’s are needed for string to cold mass and vacuum vessel assembly outside of the clean rooms.

MP9 has no cryogenics capabilities, testing of cavities and completed cryomodules needs to be done at proposed HPTF areas.

To assemble cryomodules with a small scale mass production rate (1~2 cryomodules per month), MP9 facility could be used only for the cavity string assembly infrastructure and another facility could be setup for the string to cold mass and vacuum vessel assembly infrastructure (non clean room, multiple assembly lines).

This production rate will require ~50 FTE to work in multiple production assembly lines.