Long-Pulse Uncooled Copper Magnet for Gyrotron

Moshe Witman, Eviatar Avraham, Roey Ben-Moshe, Moritz Pilossof, Moshe Einat

Research output: Contribution to journalArticlepeer-review

Abstract

The operation of a gyrotron requires a strong, stable magnetic field over time. Working in the CW mode requires complex/cryogen solenoid cooling systems. Working in the pulse mode is possible with a simple solenoid, but only for short pulses, typically up to 50 μs. In this article, an intermediate working point for the gyrotron is presented: a pulsed gyrotron with a simple uncooled solenoid, which is capable of producing relatively long pulses of 10 ms. To power a longer pulse with a simple solenoid, a supercapacitor (SC)-based system has been designed, which enables the extension of the operation of pulsed gyrotrons to tens of milliseconds, while keeping the system simplicity, without a cooling system for the solenoid. The setup was realized and a 27-ms current pulse of 1.1 kA was obtained through a gyrotron with a simple copper solenoid with a stability of 0.3%. A 5-kW/10-ms radiation pulse at 28 GHz was measured from the gyrotron. This setup enables the use of a rather simple solenoid and a gyrotron and still obtains a rather long radiation pulse. This concept may open a new regime for pulsed gyrotrons.

Original languageEnglish
Article number8834846
Pages (from-to)4928-4931
Number of pages4
JournalIEEE Transactions on Electron Devices
Volume66
Issue number11
DOIs
StatePublished - Nov 2019

Keywords

  • Gyrotron
  • long pulse
  • magnetic field
  • millimeter wave
  • solenoid

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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