low power rf tests (2) in s1-g

E. KAKO (KEK) 2010' July 13 S1-G@Webex meeting

Global Design Effort

1

Low Power RF Tests (2) in S1-G



2

Low power rf tests in S1-GCryomodule-A . Stroke and hysteresis of piezo tuner. Single pulse response of piezo tuner. Stability of frequency. Reproducibility. Mechanical vibration

Cryomodule-A&C. Multi-pulse response of piezo tuner. Mechanical vibration. Damping of mechanical vibration modes

Measurement time at 2 K ; Tue. – Fri. for 4 days 13:00 ~ 19:00 for 6 h 24 h per week

Cryomodule-A&C. HOM external Q



3

Blade Tuner for FNAL Cavities

C2/ACC011 cavity

Blade tuner does not work.One piezo does not go > +110V.



4

Blade Tuner for FNAL Cavities



5

Slide-Jack Tuner for KEK Cavities

A4/MHI-09 cavity

Slide-Jack tuner does not work.



6

Hysteresis of Piezo Tuner (Cryo-A)

Static Performance of Piezo Tuner (A#2)

1300.02530

1300.02540

1300.02550

1300.02560

1300.02570

1300.02580

1300.02590

1300.02600

0 100 200 300 400 500

Piezo Voltage [V]

freq

uenc

y [M

Hz]

1st cycle

2nd cycle

3rd cycle


1299.95670

1299.95680

1299.95690

1299.95700

1299.95710

1299.95720

1299.95730

1299.95740

1299.95750

1299.95760

0 100 200 300 400 500

Piezo Voltage [V]

freq

uenc

y [M

Hz]

1st cycle

2nd cycle

3rd cycle


1300.00630

1300.00640

1300.00650

1300.00660

1300.00670

1300.00680

1300.00690

1300.00700

0 100 200 300 400 500

Piezo Voltage [V]

freq

uenc

y [M

Hz]

1st cycle

2nd cycle

3rd cycle


1300.01010

1300.01015

1300.01020

1300.01025

1300.01030

1300.01035

1300.01040

1300.01045

0 100 200 300 400 500

Piezo Voltage [V]

freq

uenc

y [M

Hz]

1st cycle

2nd cycle

100Hz/div100Hz/div

100Hz/div

50Hz/div

Network Analyzer (Vpiezo = 0 ~ +500V)

250Hz

250Hz

400Hz

450Hz



7

Reproducibility of Piezo Tuner (Cryo-A)


1299.95640

1299.95650

1299.95660

1299.95670

1299.95680

1299.95690

1299.95700

1299.95710

1299.95720

1299.95730

0 2 4 6 8 10 12

# of Cycle [count]

freq

uenc

y [M

Hz]


1300.01000

1300.01005

1300.01010

1300.01015

1300.01020

1300.01025

1300.01030

1300.01035

1300.01040

1300.01045

0 2 4 6 8 10 12

# of Cycle [count]

freq

uenc

y [M

Hz]


1300.02450

1300.02460

1300.02470

1300.02480

1300.02490

1300.02500

1300.02510

1300.02520

0 2 4 6 8 10 12

# of Cycle [count]

freq

uenc

y [M

Hz]


1300.00610

1300.00615

1300.00620

1300.00625

1300.00630

1300.00635

1300.00640

1300.00645

1300.00650

1300.00655

0 2 4 6 8 10 12

# of Cycle [count]

freq

uenc

y [M

Hz]

50Hz/div

50Hz/div 100Hz/div

100Hz/div

Network Analyzer (10 cycles, Vpiezo = 0 ~ +500V)

250Hz

250Hz

400Hz

450Hz

<100Hz

<100Hz

<100Hz

<100Hz



8

A1 (MHI#5)

-10

0

10

20

0 50 100 150 200 250

Time [min.]

Δf

[Hz]

A2 (MHI#6)_E8363B

1300.025520

1300.025530

1300.025540

1300.025550

1300.025560

1300.025570

1300.025580

1300.025590

1300.025600

1300.025610

1300.025620

0 50 100 150 200 250

Time [min.]

f0 [

MH

z]

A3 (MHI#7)_E5061B

1300.011170

1300.011180

1300.011190

1300.011200

1300.011210

1300.011220

1300.011230

1300.011240

1300.011250

0 50 100 150 200 250

Time [min.]

f0 [

MH

z]

A4 (MHI#9)_E5062A

1299.960300

1299.960350

1299.960400

1299.960450

1299.960500

1299.960550

1299.960600

0 50 100 150 200 250

Time [min.]

f0 [

MH

z]

Stability of Frequency (Cryo-A)

20Hz

20Hz

60Hz200Hz

Network Analyzer (40GHz)

Network Analyzer (3GHz) Network Analyzer (3GHz)

He press.

3.140

3.150

3.160

3.170

3.180

3.190

3.200

3.210

3.220

3.230

3.240

0 50 100 150 200 250

Time [min.]

He

Pre

ss.[

kPa]

0.01 kPa/div.

0.1kPa



9

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]

Hysteresis of Piezo Tuner (Cryo-A)

50Hz/div 50Hz/div

100Hz/div

50Hz/div

50W RF Amp. + PLL (Vpiezo = 0 ~ +500V)

200Hz

200Hz

350Hz

450Hz



10

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)



11

Mechanical Vibration Modes (Cryo-A)

A1 (MHI#5)

0

200

400

600

800

1000

1200

1400

1600

1800

0.0 100.0 200.0 300.0 400.0 500.0 600.0

Piezo Freq. [Hz]

Δψ

pp [

mV

]

A2 (MHI#6)

0

200

400

600

800

1000

1200

1400

1600

1800

2000

0.0 100.0 200.0 300.0 400.0 500.0 600.0

Piezo Freq. [Hz]

Δψ

pp [

mV

]

A3 (MHI#7)

0

500

1000

1500

2000

2500

3000

0.0 100.0 200.0 300.0 400.0 500.0 600.0

Piezo Freq. [Hz]

Δψ

pp [

mV

]

300W RF Amp., Vpp (f) = +200V (CW)

227Hz

571Hz382Hz

318Hz 521Hz

330Hz

536Hz

351Hz246Hz

PtVpp (f)= 0 - 200V

54, 204, 376, 548 Hz in Simulation



12

low power rf tests (2) in s1-g

Documents

webex meeting blade

webex meeting slidejack

webex meeting graph11300

cavityslidejack tuner

fnal cavitiess1g

hom external qs1g

low power rf tests

kek cavitiesa4mhi