The 2nd International Advisory Committee Meeting J-PARC on March 10 (Mon) and March 11 (Tue), 2003

J-PARC Muon Science Facility
Y. Miyake
International Workshop on “Future of Muon Science”(Tsukuba, Japan, 2002, March)
International Conference on “Muon Spin Rotation, Relaxation and Resonance”(Virginia, USA, 2002, June)
Workshop on “Muon Science Explored by JPARC “(JAERI, Japan, 2003, February)“The 1st MuSAC” (Chaired by Dr. J. M. Poutissou)●(Muon Science Experimental Facility Advisory Committee Meeting)(Tsukuba, Japan, 2003, February)●Technical Issues of the one year progress– Design of MLF Building related with the Muon Facility considering maintenance– Graphite Muon Target & Scrapers• Static and Dynamic Properties; Stress & Temperature– Radiation / Ductstreaming for the shield optimization– Design of the Air Handling System for NOX, , Ar-41 etc Production

International Conference on Muon Spin
Rotation, Relaxation and Resonance
Date: June 3-7, 2002
Venue: University Center of the College ofWilliam and Mary, in Williamsburg, VA,
USAWorkshop on the Muon Science Explored
by JAERI-KEK Joint Project (JPARC)
Condensed Matter Research Using µSR as
Complementary Technique to Neutronand NMR
Date: February 5 -6, 2003Venue: Advanced Science ResearchCenter,
Japan Atomic Energy Research Institute,Material and Life Science Experimental Facility- First floor -strong focusing on muon target --> φ 24mmrectangularprofile on neutron source W130mm/H50mm

Muon science area

Neutron scattering area

Experimental hall No.1

70 m

Gateway No.1

Gateway No.3

Gateway No.2

Experimental hall No.2

Muon Facility
30 m
157.6 m

MLF Tunnel Structure I（Crossed View）
130 t crane

Covered by 50-100tonof Concrete Block

30 t crane
50 t craneSide View of the Proton LineTop Shield
Top Shield
Top Shield
Top Shield
MaintenaceAreaAirDuct

4000

6000

Cable rack

10100

Experimental
hall No.1

Experimental
Hall

Experimental
hall No.2

Experimental
Hall

MLF Tunnel Area

6750

6750

Floor

M1 LineM2 Line

Target chamber
Huge
TargetPlug

Vessel1020

Target Chamber

Iron

Graphitetarget

ｯ920
ｯ810
ｯ780

Target Assembly

Target Chamber

Secondary Quadrupole

500

ｯ220

3100

Scraper Chamber

425

90310
ｯ810

2110

Pillow Seal
Secondary QuadrupolePillow Seal for theVacuum Connection

Bearing
Pantograph

Adjustable Range
82-102 mm

CASK for the maintenance of Muon Target & Scraper
反射体つり込み図

ミュオン標的つり込み図

cask

cask
basewallshield

1600

2740

4000

300

6500
6000

1800

Target

9000

755
3755
3

可動コンクリートを取り除いた段差にキャスク架台を設置。

Targ
etchamber

19253370
EV

Basement of MLF building
反射体保管設備

Proton beam Lineユニット

ユニット

ユニット

ユニット

ターゲット容器保管設備
ターゲット容器仮置場

Used Target into Basement Storage

ユニット

Weight 80 ton
Plug
20ton
Total
120ton

減速材容器保管設備

生体遮へい体ユニット

Dedicated for themaintenance of Moderator!
Prepared by Neutron GroupEVHeat, DPA, Radioactivity•Heat generation, DPA, Radioactivity production induced byproton beam and secondary particles are estimated byNMTC/JAM, MCNP and DCHAIN-SP.

Typical result ofheat calculation

Neutron irradiation effect140
thermal conductivity(W/mK)

Muon Target

3.3kW Heat deposit
Isotropic Graphite ; t=20mm
Copper frame ; t=40mm
Titanium layer; stress absorber• Thermal conductivityof graphite

••
•
•

120
100

0.02dpa 200℃
0.25dpa 200℃
0.82dpa 400℃
unirradiated

80
60
40
2000400

800 1200 1600

temperature(℃)

Static Property• Temperature
max. 1462 degC
•Tensile stress 13MPa
strength 37MPa
Share stress0.3MPastrength 18MPaCompressive stress 40MPa
strength 90MPa•Concentration of stresson Ti layer

Prototype Graphite Target

SUS Tube Blazed to Mo frame

Cast SUS Tube in Copper

SUS Tube coated with Copper••HIP(Hot Isostatic Press)
Copper –Stainless pipe
Copper –Ti & Ti –Graphite Silver Blazing in vac.

•Check the bonding

X-ray & supersonicDynamical Property
Shock wave 0.6MPafrom thermoelasticity• Thermal transient response
1. No extraordinary gradientof temperature
2. ∆T=6degC/1pulse•0mm 10mm

1400
1200

Center1000

10mm20mm

800

30mm

600

C-Cu

400

Cuframe200time(s)6423221019817614412108260

38

1600

Beam ONCu frame

Beam Off

1600

temperature(degC)

difference of stress
0.1MPa

C-Cu
20mm 30mm

Analysis of Accident

Water stop 1670degC

20000mm

1500

Cu

1000

C-Cu

500

883.

9.

time(s)208177.

213103.0

66

30.0•

2500

1•

30•

Interlock parameter•Water speed•Copper temperature•Graphite temperature•Vacuum

0.

•

What happens in case of waterstop without beam stopping ?
What degree C is the bestfor interlock ?
20 seconds laterCopper 300 degree C(with water, 100degC)
Graphite 1470 degree C
70 seconds later
Blazing will melt. (680degC)
Graphite 1660 degreeC
Vacuum becomes bad.
120 seconds later (Worst case)Copper melts down.

temperature(degC)•300degC

Scrapers
QBeam Loss less than 10 % -->10, & 20 mm Graphite

QNo Window
QInstallation of Scrapers
QNo Significant Effect to the Neutron Source
QHeat generation in Scraper #1 - #3.

#2 5.0kW#3 1.8kW

RadiusOR 11cm#1 5.7kW

4.8cm

3.5cm

Inner surface is tapered.

Beam axisRadiation shield•

From 10-m upstream to 30-m downstream, we estimate thesurface doze on the wall of 3NBT tunnel and so forth, by using
MCNPX.

Floor of maintenance area
Proton line

horizontal

verticalProton line

basement
Wall of BT tunnel
２次室断面図 B - B' （60：１）

3200

1060

3300

H=2.8m5000

H=2.8m

500

500

2300

2000

500

500

ケーブル貫通口

2700

H=2.45m
1300

H=2.45m

10000

500

500

800

Top View

2200

700

5000

H=1.75m

H=2.8m900

H=2.45m

4000

H=2.45m
2800
1750
1000

2000
100

1000

100

4310

7.02 ミュオン施設境界

Neutron

200

500

200

2000

1200200

500

1600

1750

2450

2450

650

H=2.45m

2250

H=2.45m

2450

H=2.45m

Air Handling System I
Proton Linein the vicinity ofAir SupplyStorage

Experimental
Hall

2000
1400

2000
2000

2500

1600

1600

4600

4000

2400

8000

(300x300)
Air Recovery–from Maintenance Area

•Retrieving

1000

Experimental
Hall

Muon Target(550x550) Radioactive

Refering to thePSI( > 1MW) System•Supplying cold air–from the 0.2-0.5mFL

Air Handling System II
4000•System will be installed at M1 line.

7500

2000

•4 Retriving Air Duct

10000

Supplying Duct
1300

•Return 55 Centigurade

400

14500

Retrieving Duct

M2 LineSUMPAir Circulating System

二次ビームライン室

SumpRetrieving Air Ducts (FL0.5m)

M1Line300

500

二次ビームライン室

2000

4000

•Supply 15 Centigurade,

1500

1000

350X350

OotakeM1-M2Boundary

Air Suppling Duct (FL5.5m)

Muon Science Facility
Phase 1No Ventilation
will be done,butjust circulating air
for a whilefor
M1 & M2 Tunnel

NBT

Sealing is important
How to Seal

NBT

Decay/Surface Channel

05ｍ•

Exit of the 2dary Line on thewall•

Towards to the tunnelt h r o u g h t h e c o n c r e t e blocks•Boundary of M1and M2•Cable Feed ThroughExit of the 2dary Lineon the wall
Fukuchi
800

2200

アルミ板（t6 ）

1001200

Towards to the tunnel through the concrete blocks

Polyester SheetMission of Muon ScienceAll the Components up to Neutron Sourceout of 12.2 OKU Yen

Muon Science Phase140ms•Target &Scraper•Shield•Primary Line

to 50GeV Ring

600ns

FWHM
<80ns
(*65ns)<100ns (In case of 400MeV LINAC)(*82ns (In case of 181MeV LINAC))

Phase 1 Budget 12.2 OKU Yen

LINAC:400 (181) MeV
RCS:3 GeV
Intensity :1 (0.6) MW
Repetition :25 Hz
Bunch:2

1.7 OKU Yen
5.4 OKU Yen
6.2 OKU Yen•Fundamental Facility 3.2 OKU Yen•Secondary Line
1.6 OKU Yen(5.4)

Full Width :<100 (82)nsSeparation :600ns

Longitudinal
Structure
Time Structu
re ofof 3GeV Proton Beam (25Hz)
Structu
ructureMuon Beam

Ｈ＝1.6ｍ3GeV 333μA
Proton Beam

Decay/Surface Muon Channel
H=1.6mNeutronFacility

05ｍ

Decay/Surface
Muon Channel

Beam Size φ 25 mm, Divergence 80 mradµ+Surface Muon(4MeV) 3 x 107/s
60 MeV/c

6x 106/s

120 MeV/c

2.5 x 107/sµ−40 MeV/c
60 MeV/c

1 x 106/s
3x 106/s

A Tentative Schedule of Phase 1
ItemYear

2001

2002

2003

2004

2005

2006

20072008

Linac Building
Linac Accelerator
3GeV Building
3GeV Accelerator
MLF Building(Neutron/Muon Building)
Muon Facility
Proton Beam Line
Muon Target
ShieldAir Circulation
Cooling Water
Secondary Line
Experimental Port
DesignConstruction

Muon Budget

Installation

Beam Test

Open to Users

2009

The 2nd International Advisory Committee Meeting J-PARC on March 10 (Mon) and March 11 (Tue), 2003

Summary
International Workshop on “Future of Muon Science”(Tsukuba, Japan, 2002, March)
International Conference on “Muon Spin Rotation, Relaxation and Resonance”(Virginia, USA, 2002, June)
Workshop on “Muon Science Explored by JPARC “(JAERI, Japan, 2003, February)●“The 1st MuSAC” (Chaired by Dr. J. M. Poutissou)(Muon Science Experimental Facility Advisory Committee Meeting)(Tsukuba, Japan, 2003, February)● Technical Issues of the one year progress– Design of MLF Building related with the Muon Facility considering maintenance– Graphite Muon Target & Scrapers• Prototype Target was successfully made. --> Real test with proton beam!
– Radiation / Ductstreaming for the shield optimization– Design of the Air Handling System for NOX, , Ar-41 etc Production●Expecting budget for Phase 2, as soon as possible for the rest of the secondary beamline.