P3-3: Measurement of loss in high power 170 GHz gyrotron transmission lines

Elizabeth J. Kowalski; Emilio A. Nanni; Michael A. Shapiro; Jagadishwar R. Sirigiri; Richard J. Temkin; Timothy S. Bigelow; David A. Rasmussen

doi:10.1109/IVELEC.2010.5503412

P3-3: Measurement of loss in high power 170 GHz gyrotron transmission lines

Elizabeth J. Kowalski
, Emilio A. Nanni
, Michael A. Shapiro
, Jagadishwar R. Sirigiri
, Richard J. Temkin
, Timothy S. Bigelow
, David A. Rasmussen

Fusion Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

Over-moded corrugated cylindrical waveguides are used for high power gyrotron radiation transmission applications, such as ITER, because of their low loss characteristics at millimeter wavelengths. Measurements on such over-moded systems are fraught with inaccuracies due to higher order modes. We report a new technique to accurately measure the inherent loss of an over-moded device in the desired operation mode. This technique is demonstrated successfully on low-power measurements at 170GHz in 63.5 mm diameter corrugated ITER transmission lines. We find the miter bend loss to be 0.022 ±0.008 dB (0.5 ±0.2 %), in good agreement with theory.

Original language	English
Title of host publication	2010 IEEE International Vacuum Electronics Conference, IVEC 2010
Pages	335-336
Number of pages	2
DOIs	https://doi.org/10.1109/IVELEC.2010.5503412
State	Published - 2010
Event	2010 IEEE International Vacuum Electronics Conference, IVEC 2010 - Monterey, CA, United States Duration: May 18 2010 → May 20 2010

Publication series

Name	2010 IEEE International Vacuum Electronics Conference, IVEC 2010

Conference

Conference	2010 IEEE International Vacuum Electronics Conference, IVEC 2010
Country/Territory	United States
City	Monterey, CA
Period	05/18/10 → 05/20/10

Keywords

Gyrotrons
Millimeter wave measurement
Over-moded
Transmission lines
Waveguide bends

Access to Document

10.1109/IVELEC.2010.5503412

Cite this

Kowalski, E. J., Nanni, E. A., Shapiro, M. A., Sirigiri, J. R., Temkin, R. J., Bigelow, T. S., & Rasmussen, D. A. (2010). P3-3: Measurement of loss in high power 170 GHz gyrotron transmission lines. In 2010 IEEE International Vacuum Electronics Conference, IVEC 2010 (pp. 335-336). Article 5503412 (2010 IEEE International Vacuum Electronics Conference, IVEC 2010). https://doi.org/10.1109/IVELEC.2010.5503412

@inproceedings{89978e79d7e540a3a79a3c374ad22e8e,

title = "P3-3: Measurement of loss in high power 170 GHz gyrotron transmission lines",

abstract = "Over-moded corrugated cylindrical waveguides are used for high power gyrotron radiation transmission applications, such as ITER, because of their low loss characteristics at millimeter wavelengths. Measurements on such over-moded systems are fraught with inaccuracies due to higher order modes. We report a new technique to accurately measure the inherent loss of an over-moded device in the desired operation mode. This technique is demonstrated successfully on low-power measurements at 170GHz in 63.5 mm diameter corrugated ITER transmission lines. We find the miter bend loss to be 0.022 ±0.008 dB (0.5 ±0.2 \%), in good agreement with theory.",

keywords = "Gyrotrons, Millimeter wave measurement, Over-moded, Transmission lines, Waveguide bends",

author = "Kowalski, \{Elizabeth J.\} and Nanni, \{Emilio A.\} and Shapiro, \{Michael A.\} and Sirigiri, \{Jagadishwar R.\} and Temkin, \{Richard J.\} and Bigelow, \{Timothy S.\} and Rasmussen, \{David A.\}",

year = "2010",

doi = "10.1109/IVELEC.2010.5503412",

language = "English",

isbn = "9781424470976",

series = "2010 IEEE International Vacuum Electronics Conference, IVEC 2010",

pages = "335--336",

booktitle = "2010 IEEE International Vacuum Electronics Conference, IVEC 2010",

note = "2010 IEEE International Vacuum Electronics Conference, IVEC 2010 ; Conference date: 18-05-2010 Through 20-05-2010",

}

Kowalski, EJ, Nanni, EA, Shapiro, MA, Sirigiri, JR, Temkin, RJ, Bigelow, TS & Rasmussen, DA 2010, P3-3: Measurement of loss in high power 170 GHz gyrotron transmission lines. in 2010 IEEE International Vacuum Electronics Conference, IVEC 2010., 5503412, 2010 IEEE International Vacuum Electronics Conference, IVEC 2010, pp. 335-336, 2010 IEEE International Vacuum Electronics Conference, IVEC 2010, Monterey, CA, United States, 05/18/10. https://doi.org/10.1109/IVELEC.2010.5503412

P3-3: Measurement of loss in high power 170 GHz gyrotron transmission lines. / Kowalski, Elizabeth J.; Nanni, Emilio A.; Shapiro, Michael A. et al.
2010 IEEE International Vacuum Electronics Conference, IVEC 2010. 2010. p. 335-336 5503412 (2010 IEEE International Vacuum Electronics Conference, IVEC 2010).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - P3-3

T2 - 2010 IEEE International Vacuum Electronics Conference, IVEC 2010

AU - Kowalski, Elizabeth J.

AU - Nanni, Emilio A.

AU - Shapiro, Michael A.

AU - Sirigiri, Jagadishwar R.

AU - Temkin, Richard J.

AU - Bigelow, Timothy S.

AU - Rasmussen, David A.

PY - 2010

Y1 - 2010

N2 - Over-moded corrugated cylindrical waveguides are used for high power gyrotron radiation transmission applications, such as ITER, because of their low loss characteristics at millimeter wavelengths. Measurements on such over-moded systems are fraught with inaccuracies due to higher order modes. We report a new technique to accurately measure the inherent loss of an over-moded device in the desired operation mode. This technique is demonstrated successfully on low-power measurements at 170GHz in 63.5 mm diameter corrugated ITER transmission lines. We find the miter bend loss to be 0.022 ±0.008 dB (0.5 ±0.2 %), in good agreement with theory.

AB - Over-moded corrugated cylindrical waveguides are used for high power gyrotron radiation transmission applications, such as ITER, because of their low loss characteristics at millimeter wavelengths. Measurements on such over-moded systems are fraught with inaccuracies due to higher order modes. We report a new technique to accurately measure the inherent loss of an over-moded device in the desired operation mode. This technique is demonstrated successfully on low-power measurements at 170GHz in 63.5 mm diameter corrugated ITER transmission lines. We find the miter bend loss to be 0.022 ±0.008 dB (0.5 ±0.2 %), in good agreement with theory.

KW - Gyrotrons

KW - Millimeter wave measurement

KW - Over-moded

KW - Transmission lines

KW - Waveguide bends

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M3 - Conference contribution

AN - SCOPUS:77954838850

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T3 - 2010 IEEE International Vacuum Electronics Conference, IVEC 2010

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BT - 2010 IEEE International Vacuum Electronics Conference, IVEC 2010

Y2 - 18 May 2010 through 20 May 2010

ER -

P3-3: Measurement of loss in high power 170 GHz gyrotron transmission lines

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