Development of 170 GHz/1 MW Russian gyrotron for ITER

Zapevalov, V. E.; Денисов, Г. Г.; Flyagin, V.A.; Fix, A.; Kuftin, A. N.; Litvak, A. G.; Agapova, M.V.; Iljin, V.N; Khmara, V.A.; Myasnikov, V.E.; Nichiporenko, V. O.; Popov, L. G.; Usachev, S. V.; Alikaev, V. V.; Iljin, V.I.

doi:10.1016/s0920-3796(00)00513-5

Cited by 48 publications

(20 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The obtained estimates correspond qualitatively to the results of numerical simulation of actual gyrotrons with allowance for the self-consistent structure of the high-frequency field [10,11] and the calculation models with the fixed Gaussian longitudinal structure of the high-frequency field in the cavity [5,15]. Figure 1 shows the calculated dependences of the efficiency of a gyrotron (n = 1) with the selfconsistent structure of the high-frequency field on the electron energy spread.…”

Section: Linear Theorysupporting

confidence: 73%

“…The study is based on the example of actual gyrotrons with an output power of 1 MW, operated at a frequency of 110 GHz in the TE 19,5 mode (a typical case where the cavity is optimized in terms of efficiency) and a frequency of 170 GHz in the TE 25,10 mode (a typical case where the cavity is shorter than that optimized in terms of efficiency due to the limitations of the Ohmic-loss density in the cavity walls) [10,11]. The aftercavity interaction of the electron beam with the high-frequency field in the output waveguide transition is taken into account.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Influence of the energy and velocity spread in the electron beam on the starting conditions and efficiency of a gyrotron

Zavolsky

Zapevalov

Moiseev

2006

Radiophys Quantum Electron

View full text Add to dashboard Cite

We study theoretically the influence of the spread of initial energies and velocities in the electron beam on the starting conditions and efficiency of a gyrotron. We compare various analytical and numerical models and the results of experimental studies of gyrotrons in which the interaction takes place at the first and second harmonics of the cyclotron frequency. The aftercavity interaction of the electron beam with the high-frequency field in the output waveguide transition is taken into account. The influence of the energy spread on the recuperation efficiency is estimated. Permissible spreads of the initial energies and electron velocities are determined.

show abstract

Section: Linear Theorysupporting

confidence: 73%

mentioning

confidence: 99%

Influence of the energy and velocity spread in the electron beam on the starting conditions and efficiency of a gyrotron

Zavolsky

Zapevalov

Moiseev

2006

Radiophys Quantum Electron

View full text Add to dashboard Cite

show abstract

“…Single-mode mm-wave gyrotron oscillators capable of high average power, 0.1-1 MW, in long pulse or CW operation, are currently under development in several scientific and industrial laboratories [10,[25][26][27][28][29][30][31][32][33][34][35][36][37][38][39]. Table 1 summarizes the performance parameters of modern gyrotrons for ECRH in the frequency range from 28 to 85 GHz and 95 GHz gyrotrons for active denial systems which also could be used for ECRH.…”

Section: State-of-the-art Of Fusion Gyrotronsmentioning

confidence: 99%

Recent Developments on High-Power Gyrotrons—Introduction to This Special Issue

Thumm

2010

J Infrared Milli Terahz Waves

View full text Add to dashboard Cite

Gyrotrons with output powers of several 100 kW are mainly used as high-power millimeter (mm)-wave sources for electron cyclotron resonance heating (ECRH), electron cyclotron current drive (ECCD), stability control and diagnostics of magnetically confined plasmas for generation of energy by controlled thermonuclear fusion. Other applications include ECR ion sources, materials processing and plasma chemistry, high-resolution Doppler radar, radar ranging and imaging in atmospheric and planetary science, active denial systems, as well as detection of concealed radioactive materials. The present review summarizes the status of recent developments on high-power gyrotrons and introduces this Special Issue on Gyrotrons.

show abstract

“…In many cases of practical interest, the self-consistent structure of the high-frequency field is very close to eigenmodes of a "cold" cavity (without an electron beam). In this respect, it is of interest to determine the boundaries of applicability of the models with nonfixed structure of the high-frequency field for calculations of actual gyrotrons whose field structures are nonfixed in the general case [5,18,19].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of dynamic processes in gyrotrons with low-Q cavities

Zavolsky

Zapevalov

Moiseev

2006

Radiophys Quantum Electron

View full text Add to dashboard Cite

We study theoretically models of gyrotrons having fixed and self-consistent axial structures of the high-frequency field in the cavity with an actual profile. The limits of applicability of the model with a given field structure are determined during the study of competition of the operating and parasitic modes. It is shown that for the regimes which are optimal in terms of efficiency, the influence of the nonfixed nature of the high-frequency field structure on the starting current, the stability of stationary generation of the operating mode, the efficiency, the output power, and the thermal ohmic load of the cavity is insignificant. As the beam current and the mismatch between the cutoff frequencies of the operating and parasitic modes increase, significant qualitative differences between the models with given and self-consistent axial structures of the high-frequency field are observed.

show abstract

Development of 170 GHz/1 MW Russian gyrotron for ITER

Cited by 48 publications

References 4 publications

Influence of the energy and velocity spread in the electron beam on the starting conditions and efficiency of a gyrotron

Influence of the energy and velocity spread in the electron beam on the starting conditions and efficiency of a gyrotron

Recent Developments on High-Power Gyrotrons—Introduction to This Special Issue

Numerical simulation of dynamic processes in gyrotrons with low-Q cavities

Contact Info

Product

Resources

About