On the Phase Grouping Mechanism for a Magnetron Coherent Oscillation

Journal Article · Wed Sep 15 04:00:00 EDT 2021 · TBD

OSTI ID:1886015

Kazakevich, G. ^[1]; Johnson, R. P. ^[1]; Yakovlev, V. ^[2]

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1. MUONS Inc., Batavia
2. Fermilab

CW magnetrons, developed for industrial heaters, but driven by an injection-locking signal were suggested to power Superconducting RF (SRF) cavities due to higher efficiency and lower cost of generated RF power per Watt than traditionally used RF sources (klystrons, IOTs, solid-state amplifiers). When the magnetrons are intended to feed Room Temperature (RT) cavities, the injected phase or frequency locking signal may provide required phase or frequency stability of the accelerating field. However, when the magnetron RF sources are intended to feed high Q-factor SRF cavities, the sources must be controlled in phase and power in a wide bandwidth to compensate parasitic phase and amplitude modulations caused by microphonics. In dependence on parameters of magnetron and the injection-locking signal one can choose regime most suitable for feeding SRF cavities, enabling magnetron almost coherent oscillation at the wide bandwidth of control. A novel approach considering magnetrons as quasi-coherent or coherent RF generators enables choosing the tube parameters and operation most suitable for various SRF accelerators.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1886015
• Report Number(s): FERMILAB-PUB-22-616-SQMS; arXiv:2109.07386; oai:inspirehep.net:1922210
• Journal Information: TBD, Journal Name: TBD
• Country of Publication: United States
• Language: English

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