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

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.5021605· OSTI ID:1462260

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 Office of Science (SC), High Energy Physics (HEP) (SC-25)
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1462260
Alternate ID(s):
OSTI ID: 1454304
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

References (2)

Higher order reentrant post modes in cylindrical cavities journal October 2017
Multiple harmonic frequencies resonant cavity design and half-scale prototype measurements for a fast kicker journal December 2016

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