JPH0636892A - Electron storage ring - Google Patents

Abstract

PURPOSE:To easily take out an ion to the outside of a deflecting electromagnet by providing a pulse electromagnet and an ion removing electrode around a vacuum vessel. CONSTITUTION:A pulse electromagnet 6 has a first coil 6a wound on the upper part of a window frame type ferromagnetic body 6a and a second coil 6c wound on the lower part of the ferromagnetic body 6a. When the electromagnet 6 is ON, the direction of the magnetic field is arrowed by B. Consequently, the potential formed by an electron 7 forms a mountain in a deflecting electromagnet 3 to solve the conventionally formed valley of potential. Thus, the T-on in the central part of an electron storage ring can be also easily taken out by an ExB drift. An ion removing electrode 2, which is provided in a vacuum vessel 1 and has a wire form, extends the electron life in the vessel 1 and induces the electron to take out ion to the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electron storage ring having an ion removing electrode.

[0002]

2. Description of the Related Art FIG. 3 shows, for example, "Proceedings of the 6th Symposi.
um on Accelerator Science and Technology), 2
Figure 65, Sugiyama et al., Tokyo, October 27-29, 1987 ", is a cross-sectional view of the essential part of a conventional electron storage ring, in which 1 is a vacuum container and 2 is a vacuum container 1. Wire-shaped ion removing electrodes 3 for inducing electrons and extracting ions to the outside in order to prolong the life of electrons in the vacuum container 1 are provided around the vacuum container 1 and are vertically arranged to bend the electrons horizontally. A bending electromagnet for generating a magnetic field in the direction 4 is a magnetic field direction, and 5 is an electric field direction.
Although the electron storage ring is not shown, the vacuum container 1
It is also equipped with a quadrupole electromagnet that is provided around the periphery to stabilize the orbit of electrons, a high-frequency acceleration cavity for accelerating electrons, and the like.

The conventional electron storage ring is constructed as described above. For example, when a high voltage is applied to the ion removing electrode 2, an electric field is generated in the direction indicated by reference numeral 5. Due to the generated electric field and magnetic field, the ions in the central part make an E _X B drift motion.
This direction is directed to the front side perpendicular to the paper surface of FIG. 3, and the ions are taken out of the deflection electromagnet 3.

[0004]

In the conventional electron storage ring as described above, for example, depending on the shape of the deflection electromagnet 3, the potential created by the accumulated electrons becomes low inside the deflection electromagnet 3, and the ions have a large potential. There is a problem that ions cannot be taken out because they are accumulated in the valley.

The present invention has been made in order to solve the above problems, and it is possible to easily take out ions to the outside of the deflection electromagnet even when they are trapped in the valley of the potential created by the electrons inside the deflection electromagnet. Aim to get the ring.

[0006]

An electron storage ring according to the present invention includes a pulse electromagnet provided around a vacuum container for deflecting an electron orbit in a pulsed manner, and an interior of the vacuum container corresponding to the deflection electromagnet. It is provided with an ion removing electrode which is provided to induce the electrons and take out the ions to the outside.

[0007]

According to the present invention, by exciting the pulse electromagnet, the orbits of the electrons in the vacuum chamber are changed, so that the potentials produced by the electrons are changed, and the valleys of the potentials produced by the electrons inside the deflection electromagnet are eliminated. .

[0008]

【Example】

Example 1. 1 is a perspective view of an essential part showing an embodiment of the present invention, in which the same or corresponding parts as in FIG.
The description is omitted. In the figure, reference numeral 6 denotes a pulse electromagnet provided so as to surround the vacuum container 1. As shown in FIG. 2, the pulse electromagnet 6 has a first coil 6b wound around an upper portion of a wind frame type ferromagnetic body 6a. The second coil 6c is wound under the ferromagnetic body 6a.

In the above electron storage ring, when the pulse electromagnet 6 is turned on, the direction of the magnetic field acts as shown by the arrow B, the orbit of the electron 7 swings upward, and approaches the wall surface of the vacuum container 1. As a result, the potential created by the electron 7 forms a peak inside the deflection electromagnet 3, the valley of the potential created by the electron 7 inside the conventionally formed deflection electromagnet 3 is eliminated, and the ion is externalized by the conventional E _X B drift. Can be easily removed.

When the value of the current flowing through the pulse electromagnet 6 can be reversed, the orbit of the electron 7 in FIG. 2 swings downward and approaches the wall surface of the vacuum container 1.

[0011]

As described above, according to the electron storage ring of the present invention, the potential generated by the electrons is changed by providing the pulse electromagnet that deflects the orbits of the electrons in a pulsed manner around the vacuum container. Therefore, there is an effect that the ions can be easily extracted to the outside by the conventional E _x B drift.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part showing an embodiment of the present invention.

2 is a semi-front sectional view of the pulse electromagnet of FIG. 1. FIG.

FIG. 3 is a cross-sectional view of essential parts showing an example of a conventional electron storage ring.

[Explanation of symbols]

 1 vacuum container 2 ion removal electrode 3 deflection electromagnet 6 pulse electromagnet

Claims (1)

[Claims] 1. An electron storage ring comprising a vacuum container for holding electrons in a vacuum and a deflection electromagnet provided around the vacuum container for generating a magnetic field for bending the electrons, A pulse electromagnet provided around the vacuum container for deflecting the orbit of the electrons in a pulsed manner; and an ion removal electrode provided inside the vacuum container corresponding to the deflection electromagnet for inducing the electrons to take out ions to the outside. An electron storage ring having.