Study of the Effect of Reflections on High-Power, 110-GHz Pulsed Gyrotron Operation
Abstract The effect of reflection is studied experimentally and theoretically on a high-power 110-GHz gyrotron operating in the TE22,6 mode in 3μs pulses at 96kV, 40A. The experimental setup allows variation of the reflected power from 0 to 33% over a range of gyrotron operating condi...
| Main Authors: | , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Springer US
2021
|
| Online Access: | https://hdl.handle.net/1721.1/136845 |
| _version_ | 1811080004665081856 |
|---|---|
| author | Genoud, J. Picard, J. F. Schaub, S. C. Jawla, S. K. Shapiro, M. A. Temkin, R. J. |
| author2 | Massachusetts Institute of Technology. Plasma Science and Fusion Center |
| author_facet | Massachusetts Institute of Technology. Plasma Science and Fusion Center Genoud, J. Picard, J. F. Schaub, S. C. Jawla, S. K. Shapiro, M. A. Temkin, R. J. |
| author_sort | Genoud, J. |
| collection | MIT |
| description | Abstract
The effect of reflection is studied experimentally and theoretically on a high-power 110-GHz gyrotron operating in the TE22,6 mode in 3μs pulses at 96kV, 40A. The experimental setup allows variation of the reflected power from 0 to 33% over a range of gyrotron operating conditions. The phase of the reflection is varied by translating the reflector along the axis. Operating at a higher efficiency point, at 4.40T with 940kW of output power, reflected power exceeding 11% causes a switch from operation in the TE22,6 to simultaneous operation in the TE22,6 and TE21,6 modes with a large decrease of the total gyrotron output power. This switching effect is in good agreement with simulations using the MAGY code. Operating at a more stable point, 4.44T with 580kW of output power, when the reflection is increased, the output power remains in the TE22,6 mode but it decreases monotonically with increasing reflection, dropping to 200kW at 33% reflection. Furthermore, at a reflection above 22%, a power modulation at 25 to 30MHz is observed, independent of the phase of the reflected wave. Such a modulated signal may be useful in spectroscopic and other applications. |
| first_indexed | 2024-09-23T11:24:00Z |
| format | Article |
| id | mit-1721.1/136845 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:24:00Z |
| publishDate | 2021 |
| publisher | Springer US |
| record_format | dspace |
| spelling | mit-1721.1/1368452023-02-17T20:10:25Z Study of the Effect of Reflections on High-Power, 110-GHz Pulsed Gyrotron Operation Genoud, J. Picard, J. F. Schaub, S. C. Jawla, S. K. Shapiro, M. A. Temkin, R. J. Massachusetts Institute of Technology. Plasma Science and Fusion Center Abstract The effect of reflection is studied experimentally and theoretically on a high-power 110-GHz gyrotron operating in the TE22,6 mode in 3μs pulses at 96kV, 40A. The experimental setup allows variation of the reflected power from 0 to 33% over a range of gyrotron operating conditions. The phase of the reflection is varied by translating the reflector along the axis. Operating at a higher efficiency point, at 4.40T with 940kW of output power, reflected power exceeding 11% causes a switch from operation in the TE22,6 to simultaneous operation in the TE22,6 and TE21,6 modes with a large decrease of the total gyrotron output power. This switching effect is in good agreement with simulations using the MAGY code. Operating at a more stable point, 4.44T with 580kW of output power, when the reflection is increased, the output power remains in the TE22,6 mode but it decreases monotonically with increasing reflection, dropping to 200kW at 33% reflection. Furthermore, at a reflection above 22%, a power modulation at 25 to 30MHz is observed, independent of the phase of the reflected wave. Such a modulated signal may be useful in spectroscopic and other applications. 2021-11-01T14:33:44Z 2021-11-01T14:33:44Z 2021-02-05 2021-06-16T03:50:15Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/136845 en https://doi.org/10.1007/s10762-021-00769-8 Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The Author(s), under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature application/pdf Springer US Springer US |
| spellingShingle | Genoud, J. Picard, J. F. Schaub, S. C. Jawla, S. K. Shapiro, M. A. Temkin, R. J. Study of the Effect of Reflections on High-Power, 110-GHz Pulsed Gyrotron Operation |
| title | Study of the Effect of Reflections on High-Power, 110-GHz Pulsed Gyrotron Operation |
| title_full | Study of the Effect of Reflections on High-Power, 110-GHz Pulsed Gyrotron Operation |
| title_fullStr | Study of the Effect of Reflections on High-Power, 110-GHz Pulsed Gyrotron Operation |
| title_full_unstemmed | Study of the Effect of Reflections on High-Power, 110-GHz Pulsed Gyrotron Operation |
| title_short | Study of the Effect of Reflections on High-Power, 110-GHz Pulsed Gyrotron Operation |
| title_sort | study of the effect of reflections on high power 110 ghz pulsed gyrotron operation |
| url | https://hdl.handle.net/1721.1/136845 |
| work_keys_str_mv | AT genoudj studyoftheeffectofreflectionsonhighpower110ghzpulsedgyrotronoperation AT picardjf studyoftheeffectofreflectionsonhighpower110ghzpulsedgyrotronoperation AT schaubsc studyoftheeffectofreflectionsonhighpower110ghzpulsedgyrotronoperation AT jawlask studyoftheeffectofreflectionsonhighpower110ghzpulsedgyrotronoperation AT shapiroma studyoftheeffectofreflectionsonhighpower110ghzpulsedgyrotronoperation AT temkinrj studyoftheeffectofreflectionsonhighpower110ghzpulsedgyrotronoperation |