MICE – the UK PerspectiveMICE – the UK Perspective

Rob Edgecock RAL/CERN-ABRob Edgecock RAL/CERN-AB

• IntroductionIntroduction

• UK ContributionsUK Contributions

• LocationLocation

• New beamlineNew beamline

• New infrastructureNew infrastructure

• Safety and effect on ISISSafety and effect on ISIS

• Cost to the UKCost to the UK

• ConclusionsConclusions

IntroductionIntroduction

MICE is very important for the UK and CCLRC:MICE is very important for the UK and CCLRC:

• UK involvement in NF started in 1999

• Aim: build a large component or host the machine

• A lot of progress made: - UK HoC Science and Technology committee

“Hosting a global facility like the Neutrino Factory would bring substantial scientific and commercial benefits to the UK. While we acknowledge the uncertainty of international decisions many years ahead, we recommend that the Government or PPARC consider developing a long-term strategy for bringing this facility to the UK”!

- Study III possibly at RAL- NuFact’02 at IC- CCLRC biggest group in Europe

IntroductionIntroduction

MICE is very important part of this!MICE is very important part of this!

• Crucial for the Neutrino Factory

• Increases UK (University) involvement in NF R&D

• Demonstrates UK capabilities

• Brings NF-interested physicists & engineers to the UK

MICE is unique!MICE is unique!

• Never before have 142 physicists/engineers come to the UK for particle physics

MICE is a major opportunity for PP and accel R&D in UKMICE is a major opportunity for PP and accel R&D in UK

UK ContributionsUK Contributions

Beam

Infrastructure

Cryogenics

RF power

Focus coil unit

Software

Experiment contributions: discussed earlier

Layout, services, controls

Detectors

LocationLocation

HarwellRAL

HEP Test Beam HALL

R5.2

Beam LineBeam Line

• Created using ISIS: - 800 MeV proton RCS - Pulsed at 50Hz - 2 bunches, 100ns long separated by 230ns - 240kW

• Already produces beam

• Uses internal Ti target

• Feeds quad channel in R5.2

52m

Q1 Horiz.

Q2 Vert.

Old Beam LineOld Beam Line

Old Beam LineOld Beam Line

Hall:

L = 47 m W = 12 m H = 8 m

S = 564 m2 V = 4512 m3

Two overhead cranes (8 tonnes each)

New Beam LineNew Beam Line

Modifications required to achieve this:Modifications required to achieve this:• Increased particle flux smaller collection angle: 40o 25o higher production energy: 620MeV 800MeV

Requirements: Requirements: P< 450MeV/c backgrounds < 10% few muons per s

New Beam LineNew Beam Line

• Better signal/background currently: >300MeV/c – all protons <300MeV/c – mainly pions (at 200 MeV/c:

75% , 19% , 6% e) SC decay solenoid (from PSI) or quadrupole decay channel

New Beam LineNew Beam Line

• Improved reliability new target mechanismnew magnet power supplies

new control system

• Better safety more shieldingreal security fence real beam dump!

Performance:Performance:

Rate depends momentum at 200MeV/c 3000 /ms for solenoid

300 /ms for quads Background <10%

LayoutLayout

InfrastructureInfrastructure

Cryogenics:Cryogenics:

• Required for:- super-conducting magnets for MICE- decay solenoid- liquid hydrogen, etc -

VLPCs

• Needs new building:- compressor- He and N store

• Also used for LH2

• Transfer lines

InfrastructureInfrastructure

RF power:RF power: - 1MW per cavity, 8MW total- 1-2ms at 1-10Hz- Average power ~1kW/Hz

~

TH116 TH781 RS2058EX SPS

7651EX RAL

LEVEL CONTROL

SOURCE

OTHER DRIVE CHAIN

10mW4kW40kW400kW4MW

DRIVE TO 4 CAVITIES VIA PHASE SHIFTERS AND 70db COUPLERS POWER SPLITTERS AND CIRCULATORS

40 kV 20 kV 12kV 5kV

R.A. Church RAL

- a possible scheme

InfrastructureInfrastructure

InfrastructureInfrastructure

Controls and control Controls and control room:room:

Layout and services:Layout and services: - water - power - lighting - detector layout - detector support - phased installation

HydrogenHydrogen- safety- detection hardware -

igloo - ventilation - interlocks - dump

Additional civil engineeringAdditional civil engineering - - designdesign - hall preparation - hole through ISIS wall

SafetySafety

Main issues:Main issues:

• Hydrogen!

• Magnets – fringe fields and quenches

• Radiation safety – ISIS beam loss

• RF – x-rays and dark current

• Cryogenics

• HV

• Vacuum

• etc

HydrogenHydrogen

Critical safety issue!Critical safety issue!

• Cooling channel requires minimum window thickness

• Particularly true for cooling rings

• Most work done in the US so far

• Thin Al windows designed and tested against FNALsafety regulations in US

HydrogenHydrogen

• Liquid hydrogen used at RAL: moderator in ISIS target station (much smaller volume)

Helium

Vacuum

Hydrogen

• Prevents oxygen condensation on cold surfaces afterleak through vacuum window

HydrogenHydrogen

• Corresponding MICE layout:“

-beam

Detector 1 Absorber 1 Detector 2Absorber 2 Absorber 3 RF 1 RF 2

Vacuum LH2 He Detector gas

• More windows, degraded performance

• Need a true test of a “real” cooling channel absorber

• Will need to pass CLRC safety review

“

-beam

Detector 1 Absorber 1 Detector 2Absorber 2 Absorber 3 RF 1 RF 2 Argon jacket

“

-beam

Detector 1

Absorber 1

Detector 2

Absorber 2 Absorber 3

RF 1 RF 2

Fringe Fields of MagnetsFringe Fields of Magnets

Four potential hazards: Four potential hazards: - effect on ISIS control rooms- effect on ISIS linac and synchrotron- effect on pace-makers- effect on ferromagnetic objects

0.5mT10mT Baseline case

X-RaysX-Rays

X-rays and dark current X-rays and dark current are a strong function of are a strong function of

RF voltage.RF voltage.

Need to shield, Need to shield, particularly x-rays.particularly x-rays.

Effect on ISISEffect on ISIS

During construction:During construction:

• Much work in next long shutdown - competition for resources (staff) - bigger hole in ISIS wall

• Much work in preparation and after- competition for resources (2nd target station)

During data-taking:During data-taking:

• Fringe field on linac - negligible

• Decay solenoid field on synchrotron - no problem

• Target beam loss - no worse

Cost to the UKCost to the UKSectionSection ItemItem Material/kMaterial/k€€ Staff YearsStaff Years Total Cost/kTotal Cost/k€€

Cooling Magnets 2491.0 10.0 3491

RF 1154.0 1.7 1324

Absorbers 37.0 0.8 117

Diagnostics 22.0 0.3 52

SpectrometerSpectrometer Tracker 900.0 4.2 1320

AncillaryAncillary Cryogenics 2680.0 2.0 2880

Vacuum 20.0 0.1 30

Other 570.0 2.8 850

Beam, etcBeam, etc Management 16.0 4.2 436

Civil Eng. 800.0 1.0 900

Old beam 160.0 0.3 190

New target 120.0 0.5 170

New beam 1340.0 2.0 1540

Services 1270.0 0.4 1310

OtherOther Travel 480.0 480

Analysis 17.0 1700

TotalTotal 12060.0 47.3 1679016790

Cost to the UKCost to the UK

• Cost of new decay solenoid removed

• RF contribution re-defined: wave guides power amps

Changes with respect to proposal:Changes with respect to proposal:

Some totals £k:Some totals £k:MaterialsMaterials = £ 7520k= £ 7520kStaff for constructionStaff for construction = £ 1970k= £ 1970kTravelTravel = £ 310k= £ 310kSupport/analysisSupport/analysis = £ 1100k= £ 1100kTOTALTOTAL = £10900k= £10900k

UK ManagementUK Management

• UK Collaboration formed (MICE UK): 8 labs, 44 people

• UK contact-person: Ken Long (IC)

• UK steering group: 1 person/lab, except CLRC

• At CLRC: MICE management following formal guidelines

- Joint Project Board (Long, Peach, Taylor, Wade) - Interim Project Management Committee - Installation Technical Working Group - Safety Technical Working Group

Project Sponsor- Ken Peach Project Leader- Rob Edgecock Project Scientist- Ken Long Project Manager- Paul Drumm

ConclusionsConclusions

• The NF will address questions of fundamental The NF will address questions of fundamental importance to PP and cosmologyimportance to PP and cosmology

• MICE is crucial for demonstrating cooling for a NFMICE is crucial for demonstrating cooling for a NF

• Equivalent to Equivalent to Tesla/CLIC Test FacilitiesTesla/CLIC Test Facilities

• A large and motivated collaboration has formedA large and motivated collaboration has formed

• This has shown MICE can be built and will workThis has shown MICE can be built and will work

• Total cost Total cost ~1% of a Neutrino Factory~1% of a Neutrino Factory

• MICE is a major opportunity for the UKMICE is a major opportunity for the UK- build on what’s been achieved- build on what’s been achieved- big step towards our aims- big step towards our aims - -

increase UK involvement in the NFincrease UK involvement in the NF - bring - bring particle physicists to the UKparticle physicists to the UK

• The UK has the resources and expertise to provideThe UK has the resources and expertise to providebeam and infrastructure and make big beam and infrastructure and make big

contributions to the experimentcontributions to the experiment