JPH0319200Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is based on the disk and
This relates to the structure of the cooling water flow path of the washer of the DAW accelerator type accelerator tube (hereinafter referred to as DAW accelerator tube).

A conventional DAW accelerator of this type is shown in Fig. 1. In the figure, 1 is the DAW accelerator tube,
2 is the cylinder, 3 is the disk, 4 is the washer, 5 is the washer support, 6 is the support of the coupler, and 7 is the input waveguide. , 8 is a coupler, 9 is an inlet end plate,
10 is an output end plate, 11 is a washer beam hole, 12
13 is a beam input hole, and 13 is a beam output hole.

Further, FIG. 2 is a central sectional view in the axial direction of the washer 4 in FIG. 1.

In the figure, the same reference numerals as in FIG. 1 indicate the same or equivalent parts. 14 is a groove carved in the circumferential direction of the flow channel, 15 is a washer support hole (inlet), 16 is a washer support hole (outlet), and 15, 16
correspond to the inlet and outlet of the cooling water flowing through the flow channel 14, respectively.

Further, FIG. 3 is a central sectional view taken in a direction perpendicular to FIG. 2. In the figures, the same reference numerals as in FIGS. 1 and 2 indicate the same or equivalent parts. 17 is a cooling water inlet header section, and 18 is a cooling water outlet header section.

Next, the operation will be explained. The DAW accelerator tube is
As shown in FIG. 1, it has a cylindrical shape in which a disk 3, a cylinder 2, and a washer 4 are arranged periodically. Microwave power is supplied from the input waveguide 7 to form an axial microwave electric field in the beam hole 11 between adjacent washers, while the beam input hole 1
The beam incident from 2 is accelerated to high voltage energy by this microwave electric field, and the beam is delivered to the beam output hole 13.
Take it out.

A typical example is the microwave frequency.
2856MKz, the maximum inner diameter of the DAW accelerator tube is
137mm, the outer diameter of the washer 84mm, the repetition period of the disk and washer 54.5mm, and the total length is about 50 to 200cm.

One or several washers supports 5 can be used per washers, but the smaller the number, the better the performance, and they can be arranged either symmetrically or asymmetrically. The arrangement of these components is determined by the balance between performance and mechanical strength. The following example describes an example of two washer supports.

There is a loss of microwave power along the radial plane from the point where the electric field is concentrated at the tip of the beam hole 11 of the washer 4, and in order to prevent the temperature rise due to this heat generation, as shown in Figs. A flow channel 14 is provided along the circumferential direction, and a washer support hole (inlet) 15 and a washer support hole (outlet) are provided.
Heat is absorbed by the cooling water flowing through the tube 16.

Conventionally, there has only been a proposal for how to form a flow channel in an example in which washer supports 5 are arranged in symmetrical positions. There is no difference between the clockwise and counterclockwise paths, and the same amount of cooling water flows, so there is almost no temperature change in the circumferential direction of the washers.

However, when the two washer supports 5 are arranged at right angles as shown in FIG. 8, the amount of cooling water is different between clockwise and counterclockwise directions of the flow channel.

This idea utilizes two washer supports 5 arranged asymmetrically for cooling water input and output.
The purpose of this study is to propose a DAW-type accelerator tube equipped with a Wasshya flow channel in which the clockwise and counterclockwise flow rates are the same.

An embodiment of this invention will be described below with reference to the drawings.

In FIG. 4, the same reference numerals as in FIG. 3 indicate the same or equivalent parts. Reference numeral 19 indicates a partition plate for flow rate adjustment, and reference numeral 20 indicates a cooling water hole formed in the partition plate 19 for flow rate adjustment. Figure 5A is a front view of the flow rate adjustment partition plate;
Figure B is also a side view.

Next, the operation will be explained.

Temperature changes in the circumferential direction of the washers 4 can be almost eliminated by equalizing the cooling water flow rate per unit time in the clockwise and counterclockwise directions of the flow channel.
Do as follows.

As can be seen from FIG. 4, the length of the flow channel 14 has an asymmetrical structure. That is, there is a three-fold difference in the path of the clockwise and counterclockwise flow channels from the cooling water inlet header section 15 to the cooling water outlet header section.
Therefore, in order to equalize the flow rates in the clockwise and counterclockwise directions, the cross-sectional area of the groove in the counterclockwise direction may be set to 1/3 of that in the clockwise direction. In this case, the height of the counterclockwise groove is the same as the clockwise groove, and the width of the counterclockwise groove is 1/3 that of the clockwise groove. However, there is a problem in processing that the width of the groove in the circumferential direction has to be changed, which requires a very complicated processing method. As a solution to this problem, a flow rate regulating partition plate 19 having a cooling water hole 20 shown in FIG. Make the flow rate the same.

Although the case where water is used as a cooling medium has been described above, the present invention is not limited to this.

As described above, according to this invention, a partition plate for adjusting the flow rate is provided in the flow channel so that the amount of cooling water flowing through the flow channel formed in the washer is the same.
There is almost no temperature change in the circumferential direction of the washer,
The washer symmetry is preserved even during beam acceleration,
The effect of stable beam acceleration can be obtained.

[Brief explanation of the drawing]

Figure 1 is a conceptual cross-sectional view of a conventional disc-and-washer type accelerator tube, Figure 2 is a cross-sectional view of the washer in the axial direction, and Figure 3 is a central cross-sectional view of the washer in the direction perpendicular to Figure 2 (planar). FIG. 4 is a plan view of a washer with a partition plate for flow rate adjustment based on an embodiment of the present invention, and FIG. 5 is a structural diagram of the partition plate for flow rate adjustment. 4... Washer, 14... Flow channel, 19... Partition plate for flow rate adjustment, the same reference numerals in the drawings indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] Cylindrical cylinders and disks are arranged alternately in the axial direction, and a plurality of supports are arranged at asymmetrical positions, each having a hole in the center through which accelerated electrons pass, corresponding to the arrangement of these cylinders and disks. A washer held at the center of the cylinder and disk, a cooling medium inlet provided at the connection between the washer and one support, and a cooling medium inlet provided at the connection between the washer and another support. an outlet, a channel provided circumferentially between the outlet and the inlet in a clockwise and counterclockwise direction for flowing a cooling medium into the washer, provided in the one support to introduce the cooling medium into the inlet; and a passage provided in the other support to lead out the cooling medium from the outlet, and accelerates the electron beam by a microwave electric field applied between the cylinder and the disk and the washer. , a hole of a predetermined size is provided in the washer in a direction that blocks the flow path and is located at a position facing the flow path;
Equipped with a flow rate adjustment partition plate that adjusts the amount of cooling medium per unit time in the clockwise flow path and the counterclockwise flow path in the washer to be approximately equal, and prevents temperature increases in various parts of the washer due to collisions of accelerated electrons. A disk and washer type accelerator tube characterized by having a substantially uniform cooling medium.