the atlas fast tuner design pack-zinkann-rev · pdf fileworkshop on low-level rf controls for...
TRANSCRIPT
![Page 1: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/1.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
The ATLAS Fast Tuner Design
Gary P. Zinkann
![Page 2: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/2.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
Fast Tuner Development Participants
• Ken Shepard
• Gene Clifft
• John Bogaty
• Gary Zinkann
• Segey Sharamentov
• Nemitalla Added Department de Fisica Nuclear, Universidade de Sao Paulo,Brasil
• P.N.Prakash Nuclear Science Center, New Delhi
Argonne National Lab
![Page 3: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/3.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
ATLASArgonne Tandem Linac Accelerator System
• Medium energy heavy-ion accelerator– Elements from A = 1 to A = 238– Energy range variable up to ~10 MeV/A
• Comprised of superconducting split-ring and inter-digital accelerating cavities
• Cavity frequencies range from 48.5 MHz to 97 MHz
• Typical operation of 6000 hours beam on target per year
• DOE national user facility
![Page 4: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/4.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
![Page 5: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/5.jpg)
![Page 6: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/6.jpg)
![Page 7: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/7.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
Fast Tuner Description• The fast tuner’s function is to
electronically cancel the effects of mechanical vibration on the eigen frequency and control of the RF phase with respect to a master oscillator.
• The system consists of three separate components:
1. 77K PIN Diode Unit2. PIN Diode Drive Module3. A section of the RF Control Module
![Page 8: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/8.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
Simplified Equivalent Diagram of Fast Tuner
Vloop
Loop
Coff Con
DiodeFuseControl
V1 V2
Iloop I1 I2
Vd
Id
Coaxial
![Page 9: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/9.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
77 K PIN Diode Unit
• When the diodes are switched between the on and off states, the eigen frequency shifts typically 200 Hz.
fofo - ∆ fvcx fo + ∆ fvcx
Frequency
200 Hz
Diodes Off Diodes OnEigen
Frequency
![Page 10: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/10.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
PIN Diode Switching WaveformOff
On
Off
Off
On
On
Diode Drive 50% DutyCycle
90% DutyCycle
10% DutyCycle
Average CavityResonance = fo
fo + ∆fvcx
fo - ∆fvcx
![Page 11: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/11.jpg)
![Page 12: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/12.jpg)
![Page 13: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/13.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
Simplified Equivalent Diagram of Fast Tuner
Vloop
Loop
Coff Con
DiodeFuse Control
V1 V2
Iloop I1 I2
Vd
Id
Coaxial
![Page 14: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/14.jpg)
![Page 15: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/15.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
![Page 16: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/16.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
![Page 17: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/17.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
![Page 18: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/18.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
![Page 19: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/19.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
![Page 20: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/20.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
• Vibration decay time without damper = 28sec
• Vibration decay time with damper = .5sec
Mechanical Damping Results
![Page 21: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/21.jpg)
0
0.000005
0.00001
0.000015
0.00002
0.000025
0.00003
0.000035
0.00004
5 15 25 35 45 55 65 75 85 95
Hertz
Am
plitu
de
Before Damper
After Damper
![Page 22: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/22.jpg)
![Page 23: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/23.jpg)
![Page 24: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/24.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
![Page 25: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/25.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
Switching Rise Time
Off edge voltage100 V/cm
~ 75 ηsec rise time
Off edge current4 A/cm
![Page 26: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/26.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
![Page 27: The ATLAS Fast Tuner Design pack-Zinkann-rev · PDF fileWorkshop on Low-Level RF Controls For Superconducting Linacs The ATLAS Fast Tuner Design Gary P. Zinkann](https://reader031.vdocument.in/reader031/viewer/2022022503/5ab3e03b7f8b9a156d8b5b6b/html5/thumbnails/27.jpg)
������������������� ������
������������Workshop on Low-Level RF Controls For Superconducting Linacs
Cavity Frequencies 48.5 MHz to 97 MHz Typical on-line windows 200 to 500 Hz Max. Tested Reactive Power 30KVA Measured heat load into resonator at 30KVA 2 watts Typical PIN Diode Stored Charge 85nC Typical Diode Switching Losses 15 Watts Typical RF Loss into LN2 150 to 200 Watts Total System Costs $7,000.00
Summary