status of neutrino beamline construction
DESCRIPTION
Status of Neutrino Beamline Construction. K. Nishikawa IPNS, KEK 2006 . 12 . 4. The Neutrino Beam-Line. Target-Horn System. Target Station. Muon Monitoring Pit. Final Focusing Section. 295km to Super-Kamiokande. Preparation Section. 100m. SCFM at ARC Section. Beam Dump. - PowerPoint PPT PresentationTRANSCRIPT
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Status of Neutrino Beamline Construction
K. Nishikawa
IPNS, KEK
2006 . 12 . 4
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Preparation SectionPreparation Section
SCFM at ARC SectionSCFM at ARC Section
Target-Horn SystemTarget-Horn System
Target StationTarget Station
Decay VolumeDecay VolumeBeam DumpBeam Dump
Final Final FocusingFocusingSectionSection
Muon Muon Monitoring PitMonitoring Pit
Near Neutrino DetectorNear Neutrino Detector
295km to 295km to Super-KamiokandeSuper-Kamiokande
The Neutrino Beam-LineThe Neutrino Beam-Line
100m100m
3
decay volume
Near detector
TargetStation
Beam dump/-pit280m
Neutrino Beam Line for T2K ExperimentNeutrino Beam Line for T2K ExperimentComponentsComponents Primary proton beam line
Normal conducting magnets
Superconducting arc
Proton beam monitors
Target/Horn system
Decay pipe
Beam dump
muon monitors
Near neutrino detector
Special FeaturesSpecial Features
Superconducting Superconducting combined combined
functionfunction magnets magnets
Off-axis beam (2~2.5deg)Off-axis beam (2~2.5deg)
Construction: Apr.2004~Mar.2009
To Super-Kamiokande
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Primary beam linePrimary beam line
• Preparation section– NC magnet,2D(H),5Q,4str– 750W loss
• Arc section– 28 superconducting combined
function magnets – D2.6T,Q18.6T/m, L=3.3m– 1W/m loss
• FF section– NC, 2D(V), 4Q, 4str– 250W loss
• Bending– H: 84.5o
– V: 3.1~3.6o downward in FF sect. (OA angle 2~2.5o)
• Proton beam monitors– Intensity, Profile, Position, Loss
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Tunnel for Primary Beam-lineTunnel for Primary Beam-line
50GeV
Preparation Section
Preparation Section
Arc SectionFinal Focus Section
Extraction area
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Primary line componentsPrimary line components
• Normal-conducting magnets
- Installation in coming July for preparation section
- Fabrication of FF magnets in progress,
and to be installed in FY2008.• Power supply
- Spec. examination for assignment to magnets be done
• Vacuum
- Beam pipe installed in magnets for prep.
- Intra-magnet beam pipe being designed.• Beam plug
- ready for installation in coming summer• Collimator
- re-examining aperture due to optics change.
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Superconducting magnets and cryogenicsSuperconducting magnets and cryogenics
• SC magnets– R&D since 2001– Successfully developed and tested– Mass production started in FY2005– 17 magnets completed– 6 “doublet” (2mag in 1 cryostat)
completed– Installation in FY2008
• Cryogenics– Design completed– Contract made– Manufacturing started
Cryo. Sci. C. and Cryo. G., IPNS
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Beam MonitorsBeam Monitors• Configuration - Position : Electro-static monitor (ESM)
- Profile : Segmented Secondary Emission Monitor (SSEM), OTR
- Intensity : CT - Loss monitors (BLM): Ion. chamber • Status- ESM :
ESM#0 and ESM #1 successfully made and tested
Bidding for all Prep ESM in progress
- SSEM
Chamber bidding be placed soon
Moving mechanisms of SSEM for super-conducting part tested and moved smoothly at liquid-nitrogen temperature.
Moving mechanism for normal-conducting part also tested.
To be adopted with several minor modifications.
Beam loss monitor will be placed along the beam line.
FFTS-Beam
PS
I,C,P
C,P
I,C,P
C,P
C
CC,P
TGT
C,PC,P
C,P
C,P
C,P,C,I I,C,P
C,P
Arc
C,P
C,P
C,P C,PC,P
FFTS-Beam
PS
I,C,PI,C,P
C,PC,P
I,C,PI,C,P
C,PC,P
CC
CCC,PC,P
TGT
C,PC,PC,PC,P
C,PC,P
C,PC,P
C,P,C,I I,C,PI,C,P
C,PC,P
Arc
C,PC,P
C,PC,P
C,PC,P C,PC,PC,PC,P
Intensity(CT)
Center(ESM)
Profile(SSEM)
2 9 9
0 5 3
2 6 5
Prep. Sect.
Arc sect.
FF sect.
Intensity(CT)
Center(ESM)
Profile(SSEM)
2 9 9
0 5 3
2 6 5
Prep. Sect.
Arc sect.
FF sect.
OTR
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DV
TS
BD
Beam Dump(BD)•graphite core in helium vessel
Decay Volume (DV)•94m long helium vessel•6m thick concrete shield
Secondary Beam LineSecondary Beam Line
Target station (TS) •Target & horns in helium vessel Muon monitor
in muon pit
Spill-by-spill monitor of muon intensity/profile
•50m part already constructed•Civil construction of downstream part just started
•Civil construction of underground part will finish soon.•(10cm thick iron)Helium vessel being manufactured
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Target StationTarget Station
•Civil construction of underground part will finish soon.•He vessel will be installed from Aug. 2007.
•Helium vessel is being manufactured at the factory.
Top part
Bottom part
Cooling channels
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TargetTarget• Graphite 26mm(D)x900mm(L)• Heat load: 58kJ/spill (~20kW)• Thermal shock (T~200K) ~
7MPa (<Tensile strength 37MPa)• Forced flow Helium gas cooling• Remote maintenance
• The target full prototype is being manufactured.
• The He circulation system achieved >200m/s flow at the (imitated) target surface.
• Installation in FY2008
PrototypePrototype
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Horn1 Horn2Horn3
target
BeamElectromagnetic hornsElectromagnetic horns
• As endurance test, 1st horn prototype have been operated with 8.5E5 pulses without serious troubles.
• The 3rd Horn was produced and connected serially with the 1st horn.
• The long term test at 320kA with this configuration just started and will continue until the end of August.
• The 320kA operation with full setup at Fuji-Hall is being prepared.
1st Horn3rd Horn
•The support module for the 3rd horn was produced.
This 12tons iron box hangs the 3rd horn.
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Decay VolumeDecay Volume• 94m-L iron helium vessel cooled by water• 6m concrete shields• ~150kW heat on iron walls and concrete• Middle part (50m-L) was already constructed.• Construction of most upstream and downstream parts just started.
Cooling channels
Feb. 2005
3NBT
6m厚コンクリート躯体
ディケイボリューム94m ビームダンプターゲットステーション
Middle part (50m-L)Most upstream part
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Beam Dump / Muon MonitorBeam Dump / Muon Monitor
• 98 graphite blocks cooled by Al modules.• Production of Graphite blocks finished.• First module was assembled.• Machining of graphite blocks: FY2007• Production of cooling modules: FY2007• Fabrication of He vessel plates: FY2007• Assemble/installation: FY2008
• Two Independent System
– Semiconductor detector array
– Ionization chamber array
• Spill –by-spill monitor for the muon profile center
• Prototype being tested w/ beam
Array of ICs
Gas flow
160
cm
160 cmGas flow
160
cm
160 cm
Beam dumpMuon monitor
Graphite blocks
First module
Off-axis Off-axis
On-axisOn-axis
B3
B2
B1
0.2T
10m
23m
29m
33mBeam
•Detectors
On-axis neutrino profile measurement
Off-axis measure neutrino on the direction to Super-Kamiokande before neutrino oscillation
Design is in progress and will be fixed soon.
• Technology
Scintillator + WLS opt. Fiber + Multipixel APD (new photo sensor)
test of samples before mass production is being performed
TPC with micromegas --> prototype is being build
Neutrino Detector: ND280Neutrino Detector: ND28017.5m
•Civil construction will start soon.
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Schedule of Schedule of beam line beam line
2004.4-2006.32005.4-2007.32006.4-2008.32007.4-2009.3
Target station•const.: ’06~’08•Install: ’08
Proton beam line•const.: ’05~’06•Install: 07, ’08
half of Decay volume•const.: ’04~’05•Install: ’04
Buildings•Const.: ’07
Near detector•const.: ’07~’08•Install: ’08
Beam dump &half of Decay vol.•const.: ’07~’08•Install: ’08
Primary line tunnelNC mags (Prep. Sect.)SC/NC in FFCryogenics
TS civil/buildingEquipments in TSDecay volumeBeam dump
Neutrino monitor
Sec
onda
ryP
rimar
y
101 7Facility Design
7 10
20062004 2005 2009H21
4 7 10
2007
47 10 11st yr 2nd yr 3rd yr
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2008
4 7 10 1Last yr
7 10 14th yr
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Inst.
Inst.
Inst.Comm.
Inst./Test ope.
Civil Civil Inst.
Inst.CivilInst.Civil mag
inst
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SummarySummary
• Beam line construction is on schedule
• No fatal problem so far
• Superconducting/normal magnets are being manufactured
• Production of other components are
in progress or in preparation
• Civil constructions are on schedule.
• Almost all components will be installed in FY2008
• Beam will start in Apr. 2009