JPH063496A - Device for generating radial beams - Google Patents

Abstract

(57) [Summary] [Structure] A synchrotron radiation generator comprises a deflecting electromagnet 2 having partially different magnetic field strengths, a plurality of beam ducts 5 and 6 located between two poles of the deflecting electromagnet for entering and exiting an electron beam. It is composed of a vacuum container 3 having a radiant light extraction port 7. The electron beam incident on the synchrotron radiation generator of the present invention is deflected by 360 ° or an integer multiple thereof while changing the orbital radius under the influence of the magnetic field intensity distribution, and then is emitted. [Effect] The electron beam incident on the synchrotron radiation generator is almost 3
Since the light is output after being deflected by an integral multiple of 60 °, the number of magnets that must be added in order to increase the deflection unit that is the radiation light generation unit is minimized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an industrial radiation light generator, and more particularly to a radiation light generation facility that requires a large number of radiation light sources.

[0002]

2. Description of the Related Art In a conventional synchrotron radiation generating facility, radiant light is extracted from a deflector of an electron storage ring. Therefore, the total angle of the deflector serving as a radiant light source is 360 °, and a device for increasing the deflector is As shown in JP-A-1-186798, a plurality of bending electromagnets are added.

[0003]

In the conventional synchrotron radiation generating facility, the deflector serving as the radiant light source uses a deflecting electromagnet having a constant orbit radius, and the deflecting angle of each deflector must be smaller than 360 °. I have to. Therefore, at least two deflection electromagnets having different polarities had to be added in order to make the total deflection angle of the deflection section larger than 360 ° in one plane.

An object of the present invention is to provide a radiant light generating device capable of minimizing the number of deflection electromagnets added to increase the radiant light generating portion.

[0005]

The features of the present invention are a deflection electromagnet in which the magnetic field strength is partially changed, and an incident electron beam is approximately 360 ° or an integral multiple thereof while changing the orbital radius in the deflection electromagnet. An input / output unit is provided so as to be output by being deflected. An object of the present invention is to provide a radiant light generation device capable of increasing the radiant light generation unit by adding a minimum number of electromagnets.

[0006]

The electron beam incident on the deflection electromagnet used in the synchrotron radiation generator of the present invention turns while changing the orbital radius in the deflection electromagnet due to the partially changing magnetic field intensity distribution. By providing the emitting portion so that the electron beam is emitted when it is deflected by 360 ° or an integral multiple thereof, it is possible to increase the emitted light generating portion by adding at least one electromagnet.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of the vacuum container 3 of the synchrotron radiation generating apparatus of the present invention seen from above, and also shows an electron beam trajectory 1. FIG. 2 shows an example of a single pole shape of a deflecting electromagnet used in the synchrotron radiation generating apparatus of the present invention.

The radiation light generator of the present invention shown in FIG.
It is composed of a deflection electromagnet 2 having a partially different magnetic field strength, beam ducts 5 and 6 located between the two poles of the deflection electromagnet for entering and exiting an electron beam, and a vacuum container 3 having a plurality of radiation light extraction ports 7. . In addition, the magnetic shield plate 4 is provided in a portion of the magnetic pole where the beam trajectory must be a straight line.
Are attached above and below the vacuum container 3. When the electron beam 1 that has entered the magnetic pole exits the magnetic shield portion 4, it is affected by the magnetic field in the deflection electromagnet 2 and draws a circular orbit. In this embodiment, since the magnetic field strength is made stronger as the electron beam 1 advances, the orbital radius of the electron beam 1 becomes gradually smaller and reaches the magnetic shield portion 4 for emission after being deflected by about 360 °. Then, the beam is not affected by the magnetic field and is emitted from the emission beam duct 6. In this way, the radiation light generator can be increased by inserting one deflection electromagnet into the beam line. The deflection angle of the electron beam 1 may be any number as long as it is close to an integral multiple of 360 °.

FIGS. 2 and 3 show the magnetic pole shape of the deflection electromagnet 2 for realizing the magnetic field distribution for causing such a change in the orbital radius by making portions having different magnetic pole intervals. FIG. 2 shows that the electron beam enters a strong magnetic field region when deflected by 180 °, and FIG. 3 shows that the magnetic field intensity smoothly increases as the electron beam advances. This magnetic field intensity distribution may be any distribution that can realize a trajectory similar to the electron beam trajectory shown in FIG.

[0010]

According to the present invention, it is possible to provide a radiant light generating device capable of increasing the radiant light generating portion by adding a minimum number of electromagnets.

[Brief description of drawings]

FIG. 1 is an explanatory view of a vacuum container of a synchrotron radiation generating apparatus of the present invention seen from above.

FIG. 2 is a perspective view of a bending electromagnet used in the synchrotron radiation generating apparatus of the present invention.

FIG. 3 is a perspective view of a bending electromagnet used in the synchrotron radiation generating apparatus of the present invention.

[Explanation of symbols]

1 ... Electron beam, 2 ... Bending electromagnet, 3 ... Vacuum container, 4 ...
Magnetic shield plate, 5 ... Incident beam duct, 6 ... Emitting beam duct, 7 ... Radiant light extraction port, 10 ... Projection portion for changing magnetic field strength.

Claims (1)

[Claims] 1. A radiation light generator for deflecting an electron beam to generate radiation light, comprising a deflection electromagnet having a partially changed magnetic field strength, and a plurality of radiation light extraction ports located between two poles of the deflection electromagnet. And a beam duct for letting the electron beam into and out of the vacuum container, wherein the electron beam incident on the deflection electromagnet partially differs in magnetic field strength in the deflection electromagnet. The radiation light generation device is characterized in that an entrance / exit portion is provided so as to be emitted while being deflected by 360 ° or an integer multiple thereof while changing the orbital radius under the influence of.