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Trajectory Analysis in a Collector with Multistage Energy Recovery for a DEMO Prototype Gyrotron. Part II. Toroidal Magnetic Field

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Abstract

This paper presents the results of simulation of a collector with a four-stage recovery of the residual beam energy for a prototype gyrotron developed for the DEMO project. For spatial separation of electrons with different energies, an azimuthal magnetic field created by a toroidal solenoid is used. An increase in the recovery efficiency and a decrease in the electron flux reflected from the collector is achieved by reducing the spread of the radial position of the leading centers of electron trajectories at optimal parameters of the toroidal solenoid, as well as by using a sectioned electron beam. Trajectory analysis of the spent beam with electron distributions over the velocity and coordinate components close to those obtained in experiments with high-power gyrotrons showed the possibility of achieving a total efficiency of the gyrotron of more than 80%, which is close to the maximum efficiency with ideal separation of fractions of an electron beam with different energies.

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Funding

The work was supported by the Russian Science Foundation, project no. 16-12-10010. Some of the results were obtained using the computing resources of the supercomputer center of Peter the Great St. Petersburg Polytechnic University (http://www.scc.spbstu.ru). The development of the prototype gyrotron for the DEMO was carried out as part of the Russian Science Foundation (project no. 19-79-30071), and all the requirements for EOS were formulated within this grant.

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Authors and Affiliations

  1. Peter the Great St. Petersburg Polytechnic University, 195251, St. Petersburg, Russia

    O. I. Louksha & P. A. Trofimov

  2. Lobachevsky State University of Nizhny Novgorod, 603950, Nizhny Novgorod, Russia

    V. N. Manuilov

  3. Institute of Applied Physics, Russian Academy of Sciences, 603950, Nizhny Novgorod, Russia

    V. N. Manuilov & M. Yu. Glyavin

Authors
  1. O. I. Louksha
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  2. P. A. Trofimov
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  3. V. N. Manuilov
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  4. M. Yu. Glyavin
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Corresponding author

Correspondence to O. I. Louksha.

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The authors declare that they have no conflicts of interest.

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Translated by E. Chernokozhin

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Louksha, O.I., Trofimov, P.A., Manuilov, V.N. et al. Trajectory Analysis in a Collector with Multistage Energy Recovery for a DEMO Prototype Gyrotron. Part II. Toroidal Magnetic Field. Tech. Phys. 66, 992–998 (2021). https://doi.org/10.1134/S1063784221070082

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