Date post: | 17-Jan-2016 |
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● Offer the reliable system to the Asian regional facility STF.
● Improve TTF design and demonstrate in the beam line for RDR / TDR.
● Establish industrial design and make the precise cost estimation in close cooperation with industries.
Purpose of STF Baseline Cavity Development
Baseline Cavity Unit
Input Coupler Port
Piezo Stack
Slide Jack
Drive Shaft
Titanium Jacket
Support Base
Invar Rod
2K He Line
Motor OutsidePiezo Replacement OK
DESY
Cavity Support System is weak.
Stiff Jacket Baseplate (Ti)
Thick Titanium Baseplate No Stiffener
2.8 t 3.5 t
Thick Beam Pipe
Magnetic Shield
STF Baseline Cavity
Three STF-Baseline Cavities
The #4 Cavity will be delivered in the end of April.The vertical tests for 4 cavities will be carried out till the end of July.
Results of 1st Vertical Test (4. high field)
108
109
1010
1011
0 5 10 15 20 25
#1 Baseline Cavity ; 1'st Vertical Test
Qo 1.8K
Qo 4.2KQo
Eacc [MV/m]
1.8 ~ 2.0 K
4.2 K
Eacc, max = 19.1 MV/m
Qo = 4.7 x 109, Po = 82 W
Eacc, max = 7.8 MV/m
Qo = 4.7 x 108, Po = 47 W0.0001
0.001
0.01
0.1
1
10
100
1000
0 5 10 15 20 25
#1 Baseline Cavity ; 1'st Vertical Test
x-ray [mSv/H]
x-ra
ys
[mSv
/H]
Eacc [MV/m]
X-rays Radiation Level
Eacc,max = 19.1 MV/m, Limited by Field Emission
The 2nd vertical test will be carried out after additional surface removal by EP.
Input Coupler for Baseline Cavity
Improved input coupler design for simplicity & reduced cost (no tuning)
5K cooling here80K cooling here
Beam pipe
Warm window
Door-knob conversion
Cold window
Vacuum port
TRISTAN Type Coaxial Disk Ceramic
Static Loss 5 WDynamic Loss 3 W
Static Loss 1.1 WDynamic Loss 0.2 W
Qext = 2.0 x 106
Prf = 350 kW
Components for High Power Test Stand
Input Couplers Doorknobs
Coupling Waveguides
Tuner and Jacket
Guide slider
Pulse motor (outside)
Piezo element
Slide Jack
Motor drive shaft(G10)
Titanium Jacket
2K He line
Support base
Invar Rod
Slide Jack Tuner
Piezo Stack
Drive Shaft
Taper
Invar Rod
Roller
Input Coupler
Warm WindowVacuum Port
Cold Window
80K
5K
Beam Pipe
Monitor Port
Low loss 0.2W to 5KHigher Static loss 1.2W to 5KNo Tuning