1510

360

900

1400

25002000

Horn –current design-

0.58 H 0.46 H 0.48 H

Weight : ????

Comparison BNL type v.s. ‘New horn’

BNL type

New horn

Strip Line

Maybe 4 strip lines for one horn.

(c.f. K2K 300mm wide 15mm thick aluminum plates.)

Heat Load from Radiation

Graphite =1.8g/cm3

Water t=5mm

Al case t=1.5mm

Inner cond.

Al t=3mm

In total,

20kJ/3.3E14 protons = 6 kW @ 0.3Hz

(Joule’s heat 13kJ/ms)

cf. K2K heat load in the target from the current

= 1.4 kW

　 (surface area ~x 7)

In the graphite target, 57kJ/3.3E14 protons in total

30mm

52mm

t~19o

ZR

ZR

前提• 0.75MW 対応を基本とし、 4MW へ拡張可能とする。

• ホーン、ターゲットシステムは、 K-arena にならい上から釣る。

• ホーン、ターゲットの交換は完全リモートとする。

• ターゲット、ホーン、ビームの方向は、 Off-Axis beam 2°~3° に対応して変えられなければならない。 ( ただし変更は、しばしば行われるものではなく、 <1/yr 程度。 )

•ホーン、ターゲットの修理をするならばホットラボが必要である。

Decay Volume cooling の機械室がターゲット・ステーション建屋内に必要

配管 25A 40 本 ( ただし 0.75MW 時に使うのは、この一部 )

110m3/h, 2.9m3 for 4MW

K2K target station

Ｉｒｏｎ

Concrete

Soil

BeamSK

Target & 1st Horn

Transformer1,2

Top view

Stripline-1Stripline-2

Cave size (W3.7m, H3.8m, L17m)Cave – Radioactive air is closed simplify.Both transformers is set inside beam line.Stripline-1 : 9.3m, (Cross section t15mmx320mm)Stripline-2 :12.0m, (Cross section t15mmx320mm)

17m

2.15

3.7m

2

.15

Rail, 5-ton crane

Decay Pipe

Y. Yamanoi –KEK February 4, 2003

2nd Horn

C　 K2K Beam Channel G

Target Station –Top View-(ターゲット・ステーション地下レベル）

Z'

1.5

A

A

B

B

FV2

1.00 2.00

FV2

放射化物保管室

3.00

1.40

A

Z'

A

2.55

0.50

1.50 1.25

2.30

0.40

0.20

0.45

3.60

1.65

Target Station –Side View-

断面図

TP-1.1m

TP+11.8m(0.244Sv/ h)

TS上屋

土盛り

0.07Sv/ h for 1W/ m line

=FL=TP+10.8mＧＬ

5.00

1.00

6.50

2.20

12.0

02.

523.

67

2.59

3.50

2.00

A B C D E F

TP-1.1m

5.50

10.00

0.201.

9

A

A

B

B13.80

空隙（サービスエリア）

5.00

1.00

2.20

1.50

1.25

1.65

0.70

2.00

TS cooling

air

r1

r2

1

2log

2 r

rQT

Cylindrical model

iron

( 熱 Q が r1 の所で発生したと仮定 )

r1~1m

KW/m80

W/m103.1)(20

1

50GeV

17GeVMW75.0

Fe

4

m

Q

mr@r

mrrrT

21229

112@182log26

mr@r

mrrrT

11292

5.012@552log135

For 4MW,

To protect horns, <80o is preferable.

Upgrade to 4MW

Al 冷却

3.5m

0.2m

0.26MW

horn

240

2]m[2.0][20

]W[1026.0

]W/mK[240

]m[5.3

2

1

2

1

6

m

A

WLT

アルミ冷却と空調の併用で

なんとかならないか？

ISAC 風？

TP-1.1m

TP+11.8m(0.244Sv/ h)

土盛り

=FL=TP+10.8mＧＬ

2.20

10.0

0

2.59

5.50

10.00

0.201.

9

A

A

B

B空隙（サービスエリア）

5.00

素朴な疑問 / 問題完全リモートにするならば、 Al 板は、不必要？

　　　　放射線、空気閉じ込め、熱伝導体

完全リモートにするならば、 He は、不必要？

ホーンの捨て場はこれだけで十分か？

　　　３ｍのバスバーごと捨てると厳しい？

コスト度外視メンテナンス・シナリオ１年に１度のメンテナンス→ホットラボが欲しい。

TRIUMF ISAC Target Station

NuMI Target HallBeam line is below floor level

Horn+Module in transit

Stripline Concrete Cover

Module Support Beams Horn Shielding Module Horn

Steel Shielding Air Cooling PassageConcrete Shielding

Temporary Stackup of removed shieldingSteel from module middle Concrete from over horn

Beam passageway (chase) is 1.2 m wide x 1.3 high

NuMI by J.Hylen

Target and Horn ModulesNuMI module = 2 AP0 modules + cross-bracing walls

Water tank

Stripline

RemoteStriplineClamp

Baffle

Target

Target/Baffle Module Horn 1 Module

Horn 1

25 cm wide, 2 m deep Steel endwalls with positioning, water, electric feedthroughs

Motor drives for transverse and vertical motion of carrier relative to module

Carrier

Target moves relative to carrier for insertion into horn for L.E. beam

NuMI by J.Hylen

NuMI Target HallNuMI by J.Hylen

Lifting Tablein Hot Cell

Push horn or target up into module remotely – 5 degrees of motion

Both tables move together along beam direction

Each table has independent vertical and transverse motion

NuMI by J.Hylen

Hot Handling Work CellMount/dismount components on modules

Railing

Module

Lead-glass window

Horn

Remote lifting table

Concrete walls

Horn mechanical connection to module, remote stripline clamp, waterline connection to horn, electrical connection to horn are all done through the module by person on top of hot cell

3 m

NuMI by J.Hylen

Lifting Fixture for ModuleRemotely change pick point to match center of gravity

Teeth disengaged to enable movement of hook relative to lifting fixture frame

Teeth engaged at center of gravity for horn 1 pick

Lifting fixture box frame

Module hook

Pins to engage module hooks

NuMI by J.Hylen

Hot Handling Dosefor hot horn replacement

Source DescriptionDose Rate on Contact (mrem/hr) (30 Day, 1 Day) (30 Day, 7 Day) (252 Day, 1 Day) (252 Day, 7 Day)

Walls, Floor, & Ceiling 0 0.05 5.50E-03 6.13E-02 1.58E-02

Bottom of Horn Module 213,083 100000 6.14E+04 2.55E+05 2.13E+05

Top of Horn Module 2 1 6.14E-01 2.55E+00 2.13E+00

Horn Module Connection Region 2 1 6.14E-01 2.55E+00 2.13E+00

Inside Horn Chase (Steal) 66 31 1.90E+01 7.89E+01 6.61E+01

Face of Unremoved H-Blocks 6 20 2.20E+00 2.45E+01 6.34E+00

Horn (Side View) 19,399 600000 7.04E+03 6.13E+05 1.94E+04

Horn (Upstream View) 25,865 800000 9.38E+03 8.18E+05 2.59E+04

Horn (Downstream View) 38,797 1200000 1.41E+04 1.23E+06 3.88E+04

Bottom of T-Blocks From Horn Module 213,083 100000 6.14E+04 2.55E+05 2.13E+05

Top of T-Blocks From Horn Module 2 1 6.14E-01 2.55E+00 2.13E+00

Concrete H-Block Shield Wall #1 3 10 1.10E+00 1.23E+01 3.17E+00

Concrete H-Block Shield Wall #2 3 10 1.10E+00 1.23E+01 3.17E+00Single Wall Reflection From Chase 0 0.01 6.14E-03 2.55E-02 2.13E-02

Material In Morgue 0 NA NA NA NA

Top of T-Blocks in Target Module 2 1 6.14E-01 2.55E+00 2.13E+00Top of Target Module 2 1 6.14E-01 2.55E+00 2.13E+00

Engineer

HORN WILL BE REPAIRED

HORN WILL BE DISCARDED 2.47E-02

HORN WILL BE REPAIRED

HORN WILL BE DISCARDED

0

6.82E-02

Technician #1 Radiation Safety Official

Dose Per Person (mrem)

0

0

0

0

00

0

RSO Measured

6.84E+00

Total Dose For All Personnel (mrem)

Technician #2

1.22E+001.41E+00

Crane Operator

4.13E+00

0

0

0

0NA

00

0

0

Hide Repair Doses

Note 1 sievert = 100 rem

NuMI by J.Hylen