Joseph Tuozzolo EIC Stony Brook University January 10, 2010 MeRHIC Engineering Challenges and...

Joseph Tuozzolo EIC Stony Brook University January 10, 2010

MeRHIC

Engineering Challenges and Solutionsfor MeRHIC


MeRHICKey ComponentsPhotoinjector Design – Electron Gun (A. Burrill, 11/2009)

“Gatling Gun” multi-cathode Photocathodes & Drive Laser (A. Burrill, 11/2009)

Laser development for the required intensityLinac SCRF Accelerator Cavities (A. Burrill, 11/2009)

HOM Damper Upgrade, 6 Cavity Types, Cost and ScheduleCryogenic System (A. Burrill, 11/2009)RF systems (A. Burrill, 11/2009)

SCRF Development and Design at BNL – Engineering DesignMagnet DesignVacuum SystemRHIC Modifications – Civil and Beam LineSchedule


MeRHIC

(April 09)

Linac 1

Linac 2

Main ERLs; 6 cryomodules x 6 cavities x 18 Mev/cav = 0.65 GeV per linac

0.75, 2.05, 3.35 GeV

4 GeV

0.1, 1.4, 2.7 GeV

Pre-accelerator 90 MeV ERL

Electrongun 0.1 GeV

IR2 region features: - asymmetric detector hall (appropriate for asymmetric detector for e-p collisions) - long wide (7.3m) tunnel on one side from the IR for energy recovery linac

Main components:

-100 MeV injector on the basis of polarized electron gun (50 mA) and pre-accelerator ERL.

-Two main ERLs (one of them in the RHIC tunnel) with maximum 0.65 GeV energy gain per linac.

-Recirculation passes are going outside of the existing tunnel: warm magnets, acceptable synchrotron radiation power.

MeRHIC: General layout


MeRHIC

4

SCRF Cavity Development (Ilan’s Talk)

Energy Recovery LINAC•5 Cell SCRF Assembled and Tested at 2K

ERL e Gun•ASME Code compliance design complete•Laboratory Safety Committee Approval•Fabrication underway

RHIC 56 Mhz SCRF Cavity•ASME Code compliance design complete•Laboratory Safety Committee Approval•Contract

SCRF Vertical Test Facility•ASME Code compliance design complete•Laboratory Safety Committee Approval•Test Dewar & Cryogenic Refrigerator in House•Shielded Enclosure Complete

Collaborative Support:JLab, AES, SNS, TRUMPF,Cornell, Amuneal, . . .


MeRHIC

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SCRF Cavity Development – ASME Code Compliance

Cryogenic Systems need extensive review(DOE Pressure Safety Compliance and LHC Failure)•Detailed Stress Analysis done in house using ANSYS w/peer review•Detailed Cryogenic Analysis to determine proper relief valve sizing w/peer review•Fabrication QA: material testing and certifications, welding procedures and qualification, fabrication in process inspection, leak and pressure testing, certified relief devices, etc.•Final Review and approval by Laboratory Committee


MeRHIC

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Magnet Systems

Arc Magnets (Conventional, Small Aperture, high accuracy, copper bus magnets)• 361 Quadrupoles, 150 Dipoles, 56 Trim Dipoles, 56 Correctors• Prototype dipole already machined, assembled, and field mapped.• Quadrupole prototype being machined

Spreader Combiner Magnets (Dan’s Talk)• 4 Spreader/Combiner conventional dipole magnets, • 10 thin septum magnets, 42 vertical dipole magnets, 68 Correctors

SCRF Cavity Magnets• 14 SC Quadrupoles in the SCRF cavity cryostats

BNL Design, 1st Article, Test, Commercial Bid – Built to Print or Build to Specification (SC Quadrupole).


MeRHICVacuum System Layout

BEAM VACUUM•30 VACUUM SECTORS•10e-9 Torr pressure in arcs and s.s.•10e-10 Torr in baked transition regions•<10e-10 Torr in SC LINAC•Fully RF shielded components

LINAC INSULATING VACUUM•<10e-3 warm•Turbomolecular pump on each Module

MeRHIC Vacuum I&C•Based on recent system upgrades to AGS/Booster and EBIS

Challenges•Stress in small aperture thin wall chambers.•Synchrotron light energy absorber design. (JoAnne’s talk).


MeRHIC

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Beam Line Modifications Required in the RHIC Tunnel

Removal/Relocation of existing RHIC Beam Instrumentation.

Removal of both DX magnets/Splice Bus.

Install two new Polarized Proton Spin Rotators/modify VJP.

Separate Beam Tubes for blue and yellow beam.

• Be beam tube. STAR and PHENIX beam tubes.


MeRHIC

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Spin Rotator Installations 1:00 and 2:00

Fabricate 2 new Spin Rotators (BNL Magnet Division)

Spare Coil Assembly will help schedule

Reconfigure Q4 end for Spin Rotator Coupling

New VJP sections required between Q3 and Spin Rotator

New warm to cold fabricated for Spin Rotator/VJP transition

Fabricate components to existing drawings 6:00 and 8:00


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Remove DX Magnets, Install e Beam Injection Chicane

Removal of both DX magnets as a complete units

Remove and re-splice Blue SC Bus.

DO magnets do not have to be shifted

6 new warm dipoles for beam alignment

2 new wide aperture warm dipoles

DX Magnet + Y chamber & ZDC


MeRHIC

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Conventional Facilities – Civil Construction

Major Additions:Racetrack tunnel with transitions to RHIC tunnel. (possible RHIC schedule issue)• Service buildings with access ports to racetrack• 1ea – 20x150 for cavities, 1ea – 16x40 for ERL, 2 ea -16x50 for bendsPower• Extension of the 13.8Kv overhead line to 2:00 – 25 MW• 2ea – 2 ½ MVA unit substations, 1ea 13.8/4.2Kv transformers, Basic power distributionCooling water• 3 MW demineralized cooling water system - Basic water distributionUtilities• Extension of the sanitary sewer line, Utility compressed air, Domestic water, Extension of the storm

drains, Network / communications ductwork


MeRHICSummary of C-AD Facility Characteristics

Over 1 Million Ft2 Of Equipment, Office, And Workshop Space

110 Buildings

1000 Acres Of Land

7 Accelerators

400 Direct Staff

22.5 Allocated Staff

6.2 Miles Of Vacuum Beam Pipe

24 Miles Of Cable Tray

62 Electrical Substations

1000s Of Electrical Distribution Circuits

15 Cooling Towers In Service

52 Cooling Systems In Service

1000s Of Electro-magnets / Power Supplies

1740 Superconducting Magnets in RHIC

26 Compressors For Cryogenics System

Power Consumption: 25 MW includes 5 MW for the cryogenic refrigerator.

(MeRHIC: 5.7 MW cryogenics, 14 MW RF and PS)


MeRHIC

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Installation – Schedule

Only Four year construction project CD-3 to CD-4

Critical Items must be ordered during CD-1 and CD-2

• SCRF Cavity Fabrication

• Tunnel Construction Design

• Spin Rotator Magnet Fabrication

Long Lead Items will drive schedule

RHIC Operations Schedule During Construction

New Tunnel tied in 2 years after CD-3

Temporary Shielding at Tunnel Tie-in

• Existing 20 Ton Crane!

N

E

W

S


MeRHICC-A Department 50 years of significant upgrades

AGS (1960)

80” Bubble Chamber + others (1966)

Slow Extracted Beam (1968)

200 MeV Linac (1970)

AGS Polarized Protons/Heavy Ions (1984 - 86)

Booster (1990)

RHIC Facilities (1980 – 2000)

NASA Space Radiation Laboratory (2004)

Electron Beam Ion Source, Stochastic Cooling (2010)

+ Collaborations: SNS, LHC, NSLS, . . .

MeRHIC is another evolution

Joseph Tuozzolo EIC Stony Brook University January 10, 2010 MeRHIC Engineering Challenges and...

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