Abstract
A preliminary design of a 1-THz gyrotron based on the fourth harmonic operation is presented. The cylindrical-waveguide TE4,8 mode is selected as the operating mode. Considering the weak beam-wave coupling strength in a 4th-harmonic open-cavity interaction circuit at the frequency of 1 THz, this paper proposes applying low-temperature cooling, for example applying liquid nitrogen, to increase the limit of the Q factor and extend the effective length of the cavity resulting in a significant enhancement of the interaction efficiency and suppression of ohmic losses. Applying multi-mode time-domain theory in the simulation, it was found that although the competing third-harmonic TE3,6 mode was excited first, the fourth-harmonic TE4,8 mode finally dominates in the steady state regime.
Original language | English |
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Number of pages | 3 |
Publication status | Published - 20 Aug 2019 |
Event | 12th UK-Europe-China Workshop on Millimetre Waves and THz Technologies (UCMMT 2019) - Queen Mary University of London, London, United Kingdom Duration: 20 Aug 2019 → 22 Aug 2019 http://www.ucmmt2019.com |
Conference
Conference | 12th UK-Europe-China Workshop on Millimetre Waves and THz Technologies (UCMMT 2019) |
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Abbreviated title | UCMMT 2019 |
Country/Territory | United Kingdom |
City | London |
Period | 20/08/19 → 22/08/19 |
Internet address |
Keywords
- electron cyclotron maser
- gyrotron
- ohmic loss
- quality factor
- sectioned cavity
- terahertz