Microwave Tubes / Power Grid Tubes

Gyrotrons

Canon Electron Tubes & Devices has engaged in the development of gyrotrons as an RF source for fusion plasma heating and measurement for many years.

Japan Atomic Energy Agency and Canon Electron Tubes & Devices have developed three key technologies for high-power quasi-CW gyrotrons: a depressed collector, a higher-order mode cavity, and a CVD diamond window. We have achieved short pulses (one millisecond) at 1.3 MW, and power levels of one megawatt for around ten seconds.

Moreover, Canon Electron Tubes & Devices was the first company to succeed in improving efficiency from 30% to 50% by collecting energy from the electron beam (collector fall-of-potential)

Gyrotrons

Features

  • High efficiency
  • Realizes more compact, low cost, and energy saving power supply and cooling units
  • Decreases undesirable X-rays
  • Improved high-power performance thanks to planarization of the output distribution
  • Uses our unique, long-life, high current density cathodes
  • Outstanding reliability realized through use of advanced high-vacuum and high-voltage technologies derived from the development of various types of electron tubes

Applications

  • Plasma heating in experimental nuclear fusion apparatus
  • Plasma measurement in experimental nuclear fusion apparatus
  • Ceramic sintering

Lineup

Gyrotrons Lineup Table
Image Type Frequency
(GHz)
Output
Power
(kW)
Output
Aperture
(cm)
Output
Mode
Length
(m)
Down
load
- E39200 28 1,000 11.2 TEM00 2.6 -
- E3988 77 1,000 8 TEM00 3.1 -
- E39101 110/138 1,000 8 TEM00 3.1 -
- E39210 154 1,000 8 TEM00 3.1 -
- E3998 170/137/104 1,000 8 TEM00 3.1 -
- E39104 170 1,000 8 TEM00 3.1 -
- E39103 170/137 1,000 8 TEM00 3.1 -
- E39207 104 / 137 1,000 8 TEM 00 3.1 -
- E39212* 170 / 137 / 104 1,000 8 TEM 00 3.1 -
- E39216* 28 10 6 TE 02 1.2 -
Notes
  1. S/C : Super Conducting Magnet
  2. The technology related to the development or manufacture of vacuum electrical equipment used at frequencies above 31.8 GHz is subject to the Export Control Act based on Wassenaar Arrangement 3.E.3.g.

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