An efficient magnetron transmitter for superconducting accelerators
Abstract
A concept of a highly-efficient high-power magnetron transmitter allowing wide-band phase and the mid-frequency power control at the frequency of the locking signal is proposed. The proposal is aimed for powering Superconducting RF (SRF) cavities of intensity-frontier accelerators. The transmitter is intended to operate with phase and amplitude control feedback loops allowing suppression of microphonics and beam loading in the SRF cavities. The concept utilizes injectionlocked magnetrons controlled in phase by the locking signal supplied by a feedback system. The injection-locking signal pre-excites the magnetron and allows its operation below the critical voltage. This realizes control of the magnetron power in a wide range by control of the magnetron current. Pre-excitation of the magnetron by the locking signal provides an output power range up to 10 dB. Experimental studies were carried out with 2.45 GHz, 1 kW, CW magnetrons. They demonstrated stable operation of the magnetrons and power control at a low noise level. In conclusion, an analysis of the kinetics of the drifting charge in the drift approximation substantiates the concept and the experimental results.
- Authors:
-
- Muons, Inc., Batavia, IL (United States)
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Budker Institute of Nuclear Physics (BINP), Novosibirsk (Russia)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1329058
- Alternate Identifier(s):
- OSTI ID: 1430553
- Report Number(s):
- FERMILAB-PUB-15-647-AD-TD
Journal ID: ISSN 0168-9002; 1478949; TRN: US1700104
- Grant/Contract Number:
- AC02-07CH11359; De-AC02- 07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
- Additional Journal Information:
- Journal Volume: 839; Journal Issue: C; Journal ID: ISSN 0168-9002
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; magnetron; transmitter; superconducting accelerator; drift equation; pre-excited magnetron; threshold of self-excitation
Citation Formats
Kazakevich, G., Lebedev, V., Yakovlev, V., and Pavlov, V. An efficient magnetron transmitter for superconducting accelerators. United States: N. p., 2016.
Web. doi:10.1016/j.nima.2016.09.044.
Kazakevich, G., Lebedev, V., Yakovlev, V., & Pavlov, V. An efficient magnetron transmitter for superconducting accelerators. United States. https://doi.org/10.1016/j.nima.2016.09.044
Kazakevich, G., Lebedev, V., Yakovlev, V., and Pavlov, V. Thu .
"An efficient magnetron transmitter for superconducting accelerators". United States. https://doi.org/10.1016/j.nima.2016.09.044. https://www.osti.gov/servlets/purl/1329058.
@article{osti_1329058,
title = {An efficient magnetron transmitter for superconducting accelerators},
author = {Kazakevich, G. and Lebedev, V. and Yakovlev, V. and Pavlov, V.},
abstractNote = {A concept of a highly-efficient high-power magnetron transmitter allowing wide-band phase and the mid-frequency power control at the frequency of the locking signal is proposed. The proposal is aimed for powering Superconducting RF (SRF) cavities of intensity-frontier accelerators. The transmitter is intended to operate with phase and amplitude control feedback loops allowing suppression of microphonics and beam loading in the SRF cavities. The concept utilizes injectionlocked magnetrons controlled in phase by the locking signal supplied by a feedback system. The injection-locking signal pre-excites the magnetron and allows its operation below the critical voltage. This realizes control of the magnetron power in a wide range by control of the magnetron current. Pre-excitation of the magnetron by the locking signal provides an output power range up to 10 dB. Experimental studies were carried out with 2.45 GHz, 1 kW, CW magnetrons. They demonstrated stable operation of the magnetrons and power control at a low noise level. In conclusion, an analysis of the kinetics of the drifting charge in the drift approximation substantiates the concept and the experimental results.},
doi = {10.1016/j.nima.2016.09.044},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 839,
place = {United States},
year = {Thu Sep 22 00:00:00 EDT 2016},
month = {Thu Sep 22 00:00:00 EDT 2016}
}
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Works referenced in this record:
High-power magnetron transmitter as an RF source for superconducting linear accelerators
journal, October 2014
- Kazakevich, Grigory; Johnson, Rolland; Flanagan, Gene
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 760
Precision vector control of a superconducting RF cavity driven by an injection locked magnetron
journal, March 2015
- Chase, B.; Pasquinelli, R.; Cullerton, E.
- Journal of Instrumentation, Vol. 10, Issue 03