Development of a high-power solid-state switch using static induction thyristors for a klystron modulator

Tokuchi, Akira; Kamitsukasa, Fumiyoshi; Furukawa, Kazuya; Kawase, K.; Kato, R.; Irizawa, Akinori; Fujimoto, Masaki; Osumi, Hiroki; Funakoshi, Sousuke; Tsutsumi, Ryouta; Suemine, S.; Honda, Yoshihide; Isoyama, Goro

doi:10.1016/j.nima.2014.09.063

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…The details of the continuous improvement of the electron gun and the accelerator are summarized in Refs. [14][15][16][17][18]. In this contribution, we describe the experimental layout designed and assembled in ISIR and some recent experimental results obtained using this layout.…”

Section: Characteristics Of the Isir Thz-felmentioning

confidence: 99%

Spatially Resolved Spectral Imaging by A THz-FEL

et al. 2020

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Using the unique characteristics of the free-electron-laser (FEL), we successfully performed high-sensitivity spectral imaging of different materials in the terahertz (THz) and far-infrared (FIR) domain. THz imaging at various wavelengths was achieved using in situ spectroscopy by means of this wavelength tunable and monochromatic source. In particular, owing to its large intensity and directionality, we could collect high-sensitivity transmission imaging of extremely low-transparency materials and three-dimensional objects in the 3–6 THz range. By accurately identifying the intrinsic absorption wavelength of organic and inorganic materials, we succeeded in the mapping of spatial distribution of individual components. This simple imaging technique using a focusing optics and a raster scan modality has made it possible to set up and carry out fast spectral imaging experiments on different materials in this radiation facility.

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Section: Characteristics Of the Isir Thz-felmentioning

confidence: 99%

Spatially Resolved Spectral Imaging by A THz-FEL

et al. 2020

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“…In order to suppress variation of accelerating voltage in electron beam generation, current must be kept above a certain level; in the case of high‐voltage pulses, current must be several 10 A. High‐voltage pulses were previously generated using thyratron switches, but this method involved a number of problems such as bulky pulse sources, strong timing jitter, and drift, limited switch life, etc. To solve these problems, efforts are made toward replacing thyratron switches with semiconductors 1,2 . High pulse voltage sources using thyratron switches generate pulses of several microseconds; discharge threshold decreases with shorter pulses, which makes possible generation of high electric fields 3 .…”

Section: Introductionmentioning

confidence: 99%

A high voltage pulse generator using avalanche‐mode thyristors

Naito

Akemoto

2021

Electrical Engineering Japan

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A high voltage and high current pulse switch using avalanche mode thyristor has been developed for the high voltage pulse generator. When the break‐over voltage is applied to a thyristor, the thyristor turns on without the gate input current. We call avalanche mode thyristor (AMT) which operates such a switch mode. AMT has many advantages, for example, turn on function without trigger input circuit in the series connection, high speed switching characteristics, etc. A magnetic switch (MS) using the saturation of the core is adopted for the high current pulse shaping. Twelve stages of AMTs generate 11 kV and 1.36 kA with 260 nanoseconds pulse width. A high voltage pulse has been produced up to 65 kV, 43A by using the AMT pulse generator and a pulse trans. The behavior of AMT and the performance of the circuit are discussed.

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