Shuichi Noguchi, KEK6-th ILC School, November 20111 Auxiliary Components Input Power Coupler HOM...
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Transcript of Shuichi Noguchi, KEK6-th ILC School, November 20111 Auxiliary Components Input Power Coupler HOM...
Shuichi Noguchi, KEK 6-th ILC School, November 2011 1
Auxiliary Components Input Power Coupler HOM Dumping Coupler Frequency Tuner He Jacket Magnetic Shield Cryostat ; Assembly & Alignment
Part-2
Shuichi Noguchi, KEK 6-th ILC School, November 2011 2
Frequency Tuner RF Accelerating Cavities usually have
Tuners. They are used to tune the Cavity Resonance
Frequency, in order to minimize the reflected RF power, usually.
Tuning Accuracy << Resonant Band Width They must cover the Wide Range of the
Fabrication / Pre-tuning Error. Feed-back can be used in CW operation.
Shuichi Noguchi, KEK 6-th ILC School, November 2011 3
Detuning Effect Input Power ReflectionCavity Field Phase Change
2
0
02
2
2
0
0
2
0
41
14
,
4111
114
L
nin
L
nnin
nin
g
nn
QQQ
Q
QQQ
P
PT
Shuichi Noguchi, KEK 6-th ILC School, November 2011 4
Phaser Diagram
gV~
exp(jt)
in
Lggr Q
Q
Q
RPV
2
2~
90o
jVV grg expcos~~
AngleDetuning;,2tan0
0
LQ
Shuichi Noguchi, KEK 6-th ILC School, November 2011 5
Possible Error SourcesError Sources Magnitude
/ Bandwidth
Speed
Fabrication Error Very Large Static
Drift ( Temperature, Pressure ) Comparable Slow
Micro-Phonics ( Vibration ) Small Slow
Beam Loading ( if is not 0 ) Comparable Slow
De-tuning Offset Comparable Offset
Lorentz De-tuning Comparable Fast in Transient
Shuichi Noguchi, KEK 6-th ILC School, November 2011 6
Tuning Principle : by Slater
Volume Change of ΔV Frequency Change of Δf
V
V
VdHEWf
f
W
VdHE
22
0
22
20
2
4
1
21
Shuichi Noguchi, KEK 6-th ILC School, November 2011 7
Normal Conducting SuperconductingStretch / Squeeze
~1
Piston Tuners
3000N/mm
Shuichi Noguchi, KEK 6-th ILC School, November 2011 8
1 2 3
Booster
Tuner Booster-1 Booster-2 Booster-3 Experience
Saclay-1 Lever Lever Screw TTF
Saclay-2 Cam & Lever Screw Under Test
Blade Blade Lever Screw Under Test
Ball-Screw Large Screw Worm Gear Worm Gear Tested
Slide Jack Wedge Screw Gear STF
Drive (Motor)Piezo
3000N/mm Need Force Boosters
Common Configuration of Tuners
Shuichi Noguchi, KEK 6-th ILC School, November 2011 9
Drive Force
Fixed PointWith Bearing Acting Point
Lever
He Jacket
Bellows
Lever Arm
Shuichi Noguchi, KEK 6-th ILC School, November 2011 10
Saclay -1 : Operation Principle
Design by M. Maurier and P. Leconte based of the MACSE tuner design
Lscrew
LarmsLcavity
Second Lever
First Lever
Motor
Notch to absorb Span Change
Support Rod
Screw
Shuichi Noguchi, KEK 6-th ILC School, November 2011 11
Saclay-1 on a TTF Cavity
Double Lever Tuner Stiffness~ 100 N/m
Second LeverFirst LeverTwo Piezos
Motor & Gear Screw
Shuichi Noguchi, KEK 6-th ILC School, November 2011 12
Saclay – 2 : Cam & Lever
Cam
Lever Arm
Drive Screw
Motor & Gear
Shaft
Shaft Support
Shuichi Noguchi, KEK 6-th ILC School, November 2011 13
Saclay - 2 : Cam & Lever
EccentricShaft (Cam)
Shaft Support with Piezo
He JacketLever Arm
Shuichi Noguchi, KEK 6-th ILC School, November 2011 14
Shuichi Noguchi, KEK 6-th ILC School, November 2011 15
Blade : Jack System
Shuichi Noguchi, KEK 6-th ILC School, November 2011 16
Blade Tuner 25 N/m
Original DESY Revised INFN
Not Stiff, Fatigue of Blade, KS=13N/m
Shuichi Noguchi, KEK 6-th ILC School, November 2011 17
Blade : Jack, Lever & Screw
LeverPiezo
Gear & Motor
Screw
Shuichi Noguchi, KEK 6-th ILC School, November 2011 18
TTF Blade Tuner
Shuichi Noguchi, KEK 6-th ILC School, November 2011 19
Geometry of the revised tuner 3.9.4
the piezo positions correspond to the double blade packs: as seen these packs withstand an higher load and therefore they were doubled.
Shuichi Noguchi, KEK 6-th ILC School, November 2011 20
The ILC Blade TunerOn the basis of the test results here presented the ILC Blade Tuner prototype is already close to fulfill all the XFEL and ILC specifications.
The experience gained with the cold tests on the so called 3.0.0 prototype has been used for the final revision of the Blade Tuner, currently under construction.
The first 8 units for Fermilab have been produced and 2 more are under construction.
Double Piezo
Shuichi Noguchi, KEK 6-th ILC School, November 2011 21
Ball Screw : Large Ball Screw
Shuichi Noguchi, KEK 6-th ILC School, November 2011 22
A prototype coaxial ball screw tuner
Shuichi Noguchi, KEK 6-th ILC School, November 2011 23
Coaxial Ball Screw 500N/mNeed Long Stroke Piezo, Fatigue of Blade
Shuichi Noguchi, KEK 6-th ILC School, November 2011 24
Slide Jack Tuner Roller Wedge & Screw
Caterpillar Roller Screw
Shuichi Noguchi, KEK 6-th ILC School, November 2011 25
Slide Jack Tuner 290N/m
Piezo Stack
Drive Shaft
Taper
Invar Rod
Caterpillar
Caterpillar
Shuichi Noguchi, KEK 6-th ILC School, November 2011 26
Tesla-like STF Baseline Cavity Package
Pulse motor (outside)
Piezo element Replaceable
Motor drive shaft
Titanium Jacket
2K He line Support base
Invar Rod
Slide Jack TunerNb/Ti Flange
Inside Magnetic Shield
Stiff Endplate
Fixed Coupler
Shuichi Noguchi, KEK 6-th ILC School, November 2011 27
Coupler Opening
Piezo can be replaced
Shuichi Noguchi, KEK 6-th ILC School, November 2011 28
Stroke of Motor Tuner
Cryomodule - C Cryomodule - A
Trouble of two motor tuners occurred inC2/ACC011 (Blade) and A4/MHI-09 (Slide-Jack/end) !!
Shuichi Noguchi, KEK 6-th ILC School, November 2011 29
A4 (MHI#9) frequency shift @ 1299[MHz]
958000
958100
958200
958300
958400
958500
958600
0 50 100 150 200 250 300 350 400 450 500
Vpiezo [V]
Fre
qu
ency
[H
z]
1st cycle
2nd cycle
A3 (MHI#7) frequency shift @ 1300[MHz]
11200
11250
11300
11350
11400
11450
11500
0 50 100 150 200 250 300 350 400 450 500
Vpiezo [V]
Fre
qu
ency
[H
z]
1st cycle
2nd cycle
A2 (MHI#6) ) frequency shift @ 1300[MHz]
25850
25900
25950
26000
26050
26100
26150
26200
26250
26300
26350
0 50 100 150 200 250 300 350 400 450 500
Vpiezo [V]
Fre
qu
ency
[H
z]
1st cycle
2nd cycle
A1 (MHI#5) ) frequency shift @ 1300[MHz]
7400
7450
7500
7550
7600
7650
7700
0 50 100 150 200 250 300 350 400 450 500
Vpiezo [V]
Fre
qu
ency
[H
z]
DC Response of Piezo Tuner (Cryo-A)
50Hz/div 50Hz/div
100Hz/div
50Hz/div
50W RF Amp. + PLL (Vpiezo = 0 ~ +500V)
200Hz
200Hz
350Hz
450Hz
A1;MHI-05KEK
A3;MHI-07KEK
A2;MHI-06KEK
A4;MHI-09KEK
Shuichi Noguchi, KEK 6-th ILC School, November 2011 30
Pulse Response by Pezo Tuner (Cryo-A)
Piezo Drive Frequency = 250 Hz
Pt
Piezo Drive Pulse(freq., Vpp)
Single Pulse Response(parameters ; frequency ; amplitude ; delay time)
Shuichi Noguchi, KEK 6-th ILC School, November 2011 31
He Jacket & Lorentz Detuning