Measurement of Dielectric Multipactor Thresholds at 110 GHz
Abstract
We report experimental measurements of the threshold for multipactor discharges on dielectric surfaces at 110 GHz. Multipactor was studied in two geometries: electric field polarized parallel to or perpendicular to the sample surface. Measured multipactor thresholds ranged from 15 to 34 MV /m, more than 10 times higher than those found at conventional microwave frequencies. Measured thresholds were compared with prior data at lower frequencies, showing agreement with theoretical predictions that thresholds increase linearly with frequency. Measurements of the rf power dissipated in the multipactor show low dissipation (≤ 1%) for the parallel electric field case, but very strong dissipation for the perpendicular case, also in agreement with theoretical predictions. In conclusion, the agreement between experiment and theory over a wide range of frequencies provides a strong basis for the understanding of dielectric multipactor discharges.
- Authors:
-
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Publication Date:
- Research Org.:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1595407
- Grant/Contract Number:
- SC0015566; FC02-93ER54186
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 123; Journal Issue: 17; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; Multipactor; High-frequency & RF discharges in plasmas; Plasma discharges in vacuum; Plasma Physics
Citation Formats
Schaub, S. C., Shapiro, M. A., and Temkin, R. J. Measurement of Dielectric Multipactor Thresholds at 110 GHz. United States: N. p., 2019.
Web. doi:10.1103/PhysRevLett.123.175001.
Schaub, S. C., Shapiro, M. A., & Temkin, R. J. Measurement of Dielectric Multipactor Thresholds at 110 GHz. United States. https://doi.org/10.1103/PhysRevLett.123.175001
Schaub, S. C., Shapiro, M. A., and Temkin, R. J. Fri .
"Measurement of Dielectric Multipactor Thresholds at 110 GHz". United States. https://doi.org/10.1103/PhysRevLett.123.175001. https://www.osti.gov/servlets/purl/1595407.
@article{osti_1595407,
title = {Measurement of Dielectric Multipactor Thresholds at 110 GHz},
author = {Schaub, S. C. and Shapiro, M. A. and Temkin, R. J.},
abstractNote = {We report experimental measurements of the threshold for multipactor discharges on dielectric surfaces at 110 GHz. Multipactor was studied in two geometries: electric field polarized parallel to or perpendicular to the sample surface. Measured multipactor thresholds ranged from 15 to 34 MV /m, more than 10 times higher than those found at conventional microwave frequencies. Measured thresholds were compared with prior data at lower frequencies, showing agreement with theoretical predictions that thresholds increase linearly with frequency. Measurements of the rf power dissipated in the multipactor show low dissipation (≤ 1%) for the parallel electric field case, but very strong dissipation for the perpendicular case, also in agreement with theoretical predictions. In conclusion, the agreement between experiment and theory over a wide range of frequencies provides a strong basis for the understanding of dielectric multipactor discharges.},
doi = {10.1103/PhysRevLett.123.175001},
journal = {Physical Review Letters},
number = 17,
volume = 123,
place = {United States},
year = {Fri Oct 25 00:00:00 EDT 2019},
month = {Fri Oct 25 00:00:00 EDT 2019}
}
Web of Science
Figures / Tables:
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