View
36
Download
0
Category
Tags:
Preview:
DESCRIPTION
MICE – the UK Perspective. Rob Edgecock RAL/CERN-AB. Introduction UK Contributions Location New beamline New infrastructure Safety and effect on ISIS Cost to the UK Conclusions. Introduction. MICE is very important for the UK and CCLRC:. UK involvement in NF started in 1999 - PowerPoint PPT Presentation
Citation preview
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
Recommended