Improved Magnetron Stability and Reduced Noise in Efficient Transmitters for Superconducting Accelerators

Conference · Sun Apr 01 00:00:00 EDT 2018

OSTI ID:1437284

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

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1. MUONS Inc., Batavia
2. Fermilab

State of the art high-current superconducting accelerators require efficient RF sources with a fast dynamic phase and power control. This allows for compensation of the phase and amplitude deviations of the accelerating voltage in the Superconducting RF (SRF) cavities caused by microphonics, etc. Efficient magnetron transmitters with fast phase and power control are attractive RF sources for this application. They are more cost effective than traditional RF sources such as klystrons, IOTs and solid-state amplifiers used with large scale accelerator projects. However, unlike traditional RF sources, controlled magnetrons operate as forced oscillators. Study of the impact of the controlling signal on magnetron stability, noise and efficiency is therefore important. This paper discusses experiments with 2.45 GHz, 1 kW tubes and verifies our analytical model which is based on the charge drift approximation.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1437284
• Report Number(s): FERMILAB-CONF-18-130-AD-APC-TD; 1673325
• Resource Relation: Conference: 9th International Particle Accelerator Conference, Vancouver, BC Canada, 04/29-05/04/2018
• Country of Publication: United States
• Language: English