Transcript Compatibility

Compatibility
in the ILC ML
主なデザインと相違点
BCD（TTF)
STF-BL
その他
空洞、シール
Φ７８mmビームパイプ、 Φ８０mmビームパイプ、
アルミヘキサゴン
インジウムヘリコ
LL, Re
入力カプラー
TTF-III
円筒セラミック窓
TRISTAN
同軸セラミック窓
TW60,TTF-V
Capacitive
ジャケット
NbTiベース
厚肉Tiベース
SUS
スライドジャッキ
Blade, BallScrew, Saclay2
チューナー
磁気シールド ジャケットの外 ジャケットの内
モーター
真空槽内
真空槽の外
ピエゾ
５ｋシールド
アクセス不可
有り
アクセス可
無し
Specification / Concept
TTF(BCD)
STF - BL
STF - LL
Operating
Gradient
23.4 MV / m
31.5 MV / m
ILC500
36 MV / m
Coupler
Tune-ability
Surface
Preparation
Yes ( XFEL )
No / Yes
No / Yes
CBP (CP)
+ EP
CBP (CP)
+ EP
Piezo, Motor
Maintainability
CP + 1400℃ HT
EP
Poor
Easier
Poor
選択肢
１： 統一デザイン
２： クライオモジュール単位
３： Plug-Compatible Design
統一デザインの利点
• 建設、保守が楽。？
選定の方法
• 必要性能の設定
• 寿命、マージン、リスク、扱い安さ
• コスト
建設と保守のイメージ
• ３極それぞれがモジュールを製作組立、
現地に搬送、設置。
• 3極それぞれがモジュール部品製作、
現地にて組立。各3極のチーム or 統一チーム
• 保守、予備機の組立、修理等は現地の統一
チームが担当。
• 始めの数年間は年間～20モジュール程度の
入替。
Why Compatibility
•
•
•
•
確立された技術ではない。
システムとしての評価が難しい。
競争原理を積極的に働かせるべき。
バックアップを持つことが望ましい。
想定されるCompatibilityのレベル
１： Cryo-module
ビームパイプ、冷却配管、RF Wave-Guide
２： Cryostat + Cavity Package
３： Cavity Package を更に分解
交換可能なユニット
•
•
•
•
•
チューナー ＋ ジャケット円筒
入力カプラー ＋ フランジ
空洞セル形状
ジャケットベース+BPフランジ+磁気シールド
Cryostat + GRP Support 腕 + Access Port
Improved Concept
in STF-BL System
• Maintainable Piezo & Motor
Configuration
• Stiff Cavity Support System
• Input Coupler
Tesla-like STF Baseline Cavity Package
2K He line
Support base
Invar Rod
Titanium
Jacket
Nb/Ti Flange
Motor drive shaft
Pulse motor
(outside)
Piezo element
Replaceable
Slide Jack Tuner
Coupler Opening
Piezo can be
replaced
STF Baseline Cavity ; Improved Stiffness
Cell Taper
13 deg. → 10 deg.
TTF Cavity
Magnetic shield
Beam Tube
f78 → f84
STF Baseline Cavity
Thick Titanium Baseplate,
Thick Nb Beam Tube & Thick Nb End-cell
Stiffness of Cavity
Fixing Support
Lorentz Detuning
STF Baseline Cavity
TTF Cavity
72 N/mm
- 150 Hz
22 N/mm
- 500 Hz
Input Port
f40 → f60
(31.5 MV/m)
Magnetic Shield
TTF-3 Coupler
Tunable
Cylindrical Window
70 W Coaxial
Heavy Flange
Bellows
Φ40mm
TTF-3 Coupler
Coupler Support
Input Coupler for STF Baseline
Cavities
Improved design for simplicity with no tuning mechanism.
TRISTAN Type Coaxial Disk Ceramic ;
(KEKB 1 MW/cw, JPARC-ADS 2.2 MW/pulse, SNS)
Warm window
Cold window
Beam pipe
Doorknob
conversion
Vacuum port
Static Loss
Dynamic Loss
80K cooling
80 K
5W
3W
5K
1.1 W
0.2 W
5K cooling
2K
0.05 W
0.03 W
Cavity Assembly (#3 Cavity) ;
Installation of Cold Coupler and Tuner
November, 2006’
Cavity
TESLA
STF-BLR
STF-LL
Iris Diameter
mm
70
70 (--> 66)
60
Beam Pipe Diameter
mm
78
80
80
Margin for Heavy Loading
Wall Angle
Coupling
deg.
14
10
0
%
1.87
1.99(1.59)
1.55
Sometimes Field Flatness Degradation of few % is observed after VT. The Effect is Larger with Smaller Coupling.
Need Statistics.
Esp / Eacc
2
2.17(2.05)
2.38
Field Emission Current is two times larger than
TESLA for the same emitter. If F.E limits the
Maximum Eacc, It is 20% lower than TESLA.
Hsp / Eacc
mT/(MV/m)
4.26
4.09(3.98)
3.78
Has the meaning only if we could eliminate the
field emitter. Many Choices to lower this value.
R/Q
W
1036
1024(1080)
1144
G
W
271
277(274)
286
Cell Thickness
mm
2.8
2.8
2.8
End cell Thickness
mm
2.8
3.5
2.8
No Stiffener
Main Coupler Port Size
mm
f40
f60
Power Capacity Margin
f40
Lorentz Detuning Factor
Length Fix, Stationary
Hz/(MV/m)2
TESLA
STF-BL
STF-LL
0.34
0.34
1.18
Cavity is not stiff. How it can be
compensated ?
He Vessel End-Plate
Material
Thickness
Stiffness
NbTi : Conical
Ti : Saucer
SUS : Saucer
mm
6
18
10
N / mm
27
450
500
Not Stiff
Cost down by Press Forming
Large thermal stress in Nb-SUS
Bonding. Risk of Leak and Crack.
He Vessel Cylinder
Material
Thickness
Stiffness
Ti
Ti
SUS
mm
4.5
5
3
N / mm
450
500
500
Lorentz Detune
Change in Flat-Top at 31.5 MV/m
Hz
500
150
330
Piezo Compensation Stroke
mm
3.4
1
20
TESLA with
Saclay1
Suppressed by Stiff Support
System. Less Compensation
Error with less Compensation.
Smaller & less expensive
Piezo & Driver Amplifier
Slow Tuner
TTF
Saclay -1
Blade
STF
STF
Slid Jack
Ball Screw
Lifetime Test (~ 0.1mm x 10000 Times) is necessary.
Mechanism
Double Lever
Blade+Lever+Screw
Wedge+Screw+Gea
r
Blade has the potential Problem
of Fatigue.
Stiffens
Stroke
Location
N / mm
40
25
Not Stiff
Not Stiff. If used to TESLA
Cavity DLD at Flat-Top
becomes ~900Hz.
mm
<2
Beam Pipe
The room for tuner is
small. Top Heavy.
Alignment?
Cost
Jacket Cylinder
Screw+Worm Gear
Life time of Coating?
290
1000
3.5
Long enough
Jacket Cylinder
Jacket Cylinder
Fast Tuner
TTF
STF
STF
Saclay -1
Blade
Slid Jack
Ball Screw
Piezo(200V)
Piezo(200V)
Piezo(150V)
Piezo+Blade
Blade has the potential
Problem of Fatigue. Speed ?
Speed ?
NORIAC (1 Spare)
NORIAC (1 Spare)
Piezo Mechanic x 1
Size
mm
10 x 10 x 26
10 x 10 x 38
φ20 x 18
Stiffness
N / mm
105
70
500
Max. Load
kN
4
4
14
Stroke:RT
mm
40
60
20
Stroke:2k
mm
4
6
2
Compensation
mm
3.4
6
1
Piezo Mechanic x 1
Speed
Delay
0.6 msec.
0.6 msec.
Reparability
Motor
need Disassemble
need Disassemble
Outside
Poor
Piezo
need Disassemble
need Disassemble
Repairable
need Disassemble
US Study on this Subject exists.
How to check Piezos just we install. There are no experience for long term operation in Pulsed mode. Life
time Test is necessary.
Main Coupler ( Cold )
TESLA500
TTF-3
Tune ability
TESLA800
LAL-Orsay
STF
STF
TTF-5
TW-60
STF-BL
Capacitive
No
No
No
Yes
Other Device
Port Diameter
mm
40
Position from cell
mm
45
Coax. Diameter
mm
40
62
W
70
1
Impedance
Bellows
62
60
40
58
55
62
60-->82
40-->72
70
50
50
35-->24
1
No
No
1
Support for Heavy Connection Flange.
Window Type
Cylinder
Cylinder
f40
f62
62
Easy Assembly
Coax. Disk
Heavy Flange
Coax. Disk
Disk
f92 / 22, t6.2
f102, t3.6
0.05
0.1
Window Size
mm
2k Static Load
W
5k Static Load
W
0.5
1
1
5k Dynamic Load
W
0.3
0.2
2
5k Load of 1 W costs
^2k Euro for 20 Years
Operation.
Warm Coupler
Coax. Diameter
Impedance
TTF-3
TTF-5
TW-60
STF-BL
Capacitive
mm
62
62
62
82-->104
72
W
50
50
50
50
24
1
1
1
2
1
Cylinder
Cylinder
Coax. Disk
Coax. Disk
Cylinder
f62
f62
F116 / 30, t6.6
f112, t4, h68
3
1.2
0.5MW / 1.4msec.
1.0MW / 1.5msec.
2MW / 1.5msec.
1.0MW / 0.4msec.
1.4MW / 0.5msec.
Bellows
Window Type
Window Size
mm
80k Static Load
W
80k Dynamic Load
W
Processing
(2MW / 1.4msec.)
Experience
Diagnostics
~50
4
4
Electron
3
3
0
Arc
1
1
1
Other Technique
Flange
TESLA
STF-BL
STF-LL
NbTi
NbTi
SUS(Ti)
Large thermal stress in Nb-SUS
Bonding.
Seal
Al : Hexagon
Helicoflex + In-Coat
f140 x t18
f124 x t14
Thick NbTi
Flange
One Superleak in 14 VT ( x 6 Flanges).
Flange thickness can be reduced with
Less Compression Force for Helicoflex.
Cost reduction is ~300 Euro for 1 BP
Flange.
???????
Number of Bolts
12
12
12
Magnetic Shield
Outside
in the He Vessel
Outside / Inside
Many Parts
Simple & Effective. Shielding Effect will
be measured.
BP Flange
Machined Ti Endplate
BP Flange Size
Alignment Reference
mm
Direct & Precise
Al : Wire + In