The Concept of a Gyrotron with Megawatt Output at Both First and Second Cyclotron Harmonics for Plasma Heating in Spherical Tokamaks

Денисов, Г. Г.; Glyavin, M. Yu.; Zotova, I. V.; Zheleznov, I. V.; Malkin, A. M.; Sergeev, A. S.; Semenov, E. S.

doi:10.1007/s11141-021-10059-x

Cited by 3 publications

(2 citation statements)

References 19 publications

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“…However, hydraulics and heat calculations showed that the used configuration of the cavity cooling system at a water flow velocity of 45 l min −1 allows diverting power from the wall with Ohmic load of up to 2.8 kW cm −2 . The feasibility of the desired regimes was confirmed in the framework of the multi-mode self-consistent model of gyrotron interaction [15], taking into account the mode competition. According to the mode spectrum presented in figure 2, the most dangerous parasitic modes are TE 32,13 , TE 34,13 , TE −30,14 , TE −31,14 .…”

Section: Main Gyrotron Parametersmentioning

confidence: 87%

“…The external signal also can be used to increase the efficiency and output radiation power [21]. In addition, the introduction of an external signal makes it possible to excite modes synchronous with the second cyclotron harmonic, despite the oversized cavity and high order of operating modes [15]. So, besides transferring the powerful output signal, it must allow entering the signal from the driver into the cavity.…”

Section: Specific Features Of the Microwave Output Systemmentioning

confidence: 99%

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Concept design of the megawatt power level gyrotron stabilized by a low-power signal for DEMO project

Денисов¹,

Kuftin²,

Мануилов³

et al. 2022

Nucl. Fusion

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The specific features of the main components of the new powerful 230GHz/80kV/40A gyrotron aimed to use in the future control fusion facility DEMO are described. The gyrotron design provides a stable output power generation of more than 1 MW using a superconducting magnet with a moderate size warm bore. Furthermore, the new original quasi-optical converter providing the gyrotron operation in three possible regimes  two free oscillation regimes with co-rotating TE33,13 or counter-rotating TE33,-13 mode, and the regime with frequency locking by the stable input signal  is suggested and optimized. The Gaussian content in the output wave-beam in all above-mentioned regimes is about 98%.

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Section: Main Gyrotron Parametersmentioning

confidence: 87%

Section: Specific Features Of the Microwave Output Systemmentioning

confidence: 99%