Comment on “Higher order reentrant post modes in cylindrical cavities” [J. Appl. Phys. 122, 144501 (2017)]

Journal Article · 14 June 2018 · Journal of Applied Physics

DOI: https://doi.org/10.1063/1.5021605 · OSTI ID:1462260

Belomestnykh, S.  ^[1]

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1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Here, a recent article [McAlister et al., J. Appl. Phys. 122, 144501 (2017)] claims to show the existence of "new'' higher order re-entrant post modes. Indeed, such modes do exist and are known to scientists and engineers for a very long time as modes of a foreshortened quarter-wave coaxial resonator. It is a textbook problem. In this comment, I briefly review the higher order modes in such cavities and provide relevant references.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE; USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Grant/Contract Number: AC02-07CH11359
• OSTI ID: 1462260
• Report Number(s): FERMILAB-PUB--18-363-TD; 1684461
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 22 Vol. 123; ISSN 0021-8979
• Publisher: American Institute of Physics (AIP)Copyright Statement
• Country of Publication: United States
• Language: English