Electromagnetic wave generating device

Abstract

A compact and low-cost electromagnetic wave generator in which X-rays having high intensity can be generated and the energy of generated X-rays can rapidly be switched. In an electromagnetic wave generator including a circular accelerator, a deflection electromagnet incorporated in the circular accelerator focuses injected and accelerated electrons, The circular accelerator produces stable electron closed orbits in a region with a predetermined width in the radial direction of the accelerator that are stable during injection and acceleration of electron. A target is arranged across the stable electron closed orbits and a collision region, where a circulating electron beam collides with the target and a non-collision region where a circulating electron beam does not collide with the target produced. Through control of respective patterns of changes with time in the deflection magnetic field, a given electron closed orbit is shifted between the collision and the non-collision regions, thereby generating X-rays.

Description

technical field [0001] The present invention relates to an electromagnetic wave generator for generating electromagnetic waves such as X-rays by electrons swirling while drawing a circular orbit in an accelerator. Background technique [0002] Among the conventional electromagnetic wave generators using a circular accelerator, there is a device using an accelerator (abbreviated as an electron cyclotron accelerator) using the acceleration principle of an electron cyclotron (Betatron) (Non-Patent Document 1 (Accelerator Science (Betatron)). Called Physics Lectures) "Ryo Kamei, Co-authored by Motoyo Kihara" (Maruzen Co., Ltd.) Published on September 20, 2015 (ISBN 4-621-03873-7 C3342). Chapter 4 Electron Cyclotron P39~P43 )), and a device using an electronic storage ring (Patent Document 1 (Patent No. 2796071)). [0003] In an electromagnetic wave generator using an electron cyclotron accelerator, an electron beam incident on the device is accelerated while orbiting with the s...

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Problems solved by technology

Therefore, in this case, as in the case of an electron cyclotron accelerator, it is difficult to switch X-rays with different energies at a high speed, which limits its application field as in the case of an electron cyclotron accelerator.

Moreover, if the storage ring has an acceleration function and is used as a synchrotron device, the energy of the electron beam that has swirled in the acceleration device can be changed, but it is difficult to ensure high-speed switching of energy. In the process of acceleration, the orbit of the electron beam is also a certain orbit, so in order to avoid collision with the target during acceleration, the target must be arranged outside the orbit

In this case, the cyclotron beam does not revolve stably after colliding with the target, as in the case of the electron cyclotron, making it difficult to repeatedly collide with the target.

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