JPH07312179A - Multi-cavity klystron - Google Patents

Abstract

PURPOSE:To realize compactness so as to attain small sizing of a magnet by connecting a water cooling pipe, connected to a water-cooled jacket of resonance cavity or drift pipe, inserted through a pole piece, to inlet/outlet pipes of cooling water mounted on the side of an input tapered part of a collector. CONSTITUTION:A high frequency acting part 21 of a multi-cavity klystron is formed by connecting a plurality of resonance cavities 22 along an electron beam path by a drift pipe 23, to connect a collector part 26, having an inlet tapered part 27, to the final resonance cavity 22 through a pole piece 28. A water-cooled jacket 24 is provided in the periphery of the cavity 22 or the drift pipe 23, to draw out a water cooling pipe 25 from each jacket 24. Inlet/ outlet pipes 29, 30 of cooling water are mounted on a lateral side of the inlet tapered part 27 of the collector part 26, to connect the water cooling pipe 25, drawn out from the jacket 24, inserted through the pole piece 28 to the pipes 29, 30. Thus by placing the pipes 29, 30 adjacent to a pipe axis also by eliminating necessity for a connecting member, length of the pipe 25 is shortened, to widen the space in the vicinity of connecting the acting part 21 and the collector part 26, so as to realize compactness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-cavity klystron, and more particularly to improvement of a cooling water channel thereof.

[0002]

2. Description of the Related Art Generally, a multi-cavity klystron has an electron gun section for generating electron beams, a high-frequency acting section in which a plurality of resonance cavities are connected by a drift tube, and an output conductor for extracting high-frequency energy. It is composed of a wave tube part and a collector part for capturing the used electron beam.

A conventional high-frequency acting section of such a multi-cavity klystron is configured as shown in FIG. 2 from a high-frequency acting section to a collector section. Reference numeral 1 in the drawing is a high-frequency acting section.
Is a resonance cavity and 3 is a drift tube. Reference numeral 4 is a water cooling jacket provided around the resonance cavity 2 and the drift tube 3, and 5 is a water cooling pipe drawn from the water cooling jacket 4. Reference numeral 6 denotes a collector portion having an inlet taper portion 7, which is connected to the high frequency acting portion 1 via a pole piece 8. Further, 9 is an inlet pipe, 10 is an outlet pipe,
Connection pipes 11 and 12 fixedly penetrated to the pole piece 8
Are connected to the water cooling pipe 5, respectively.

[0004]

However, in the conventional structure as described above, when the number of electrons colliding with the inlet taper portion 7 of the collector portion 6 increases, the vicinity of the center 13 of the collector portion 6 is increased.
From the conduction from the outside, the cooling cannot be completed, and the end portion 14 and the pole peel
The space 8 is heated and the degree of vacuum inside the tube deteriorates. Further, it is necessary to provide the inlet pipe 9 and the outlet pipe 10 for the cooling water in a portion larger than the outer diameter of the collector portion 6, which complicates the cooling water passage.

The present invention solves the above-mentioned inconvenience, and realizes a compact size and a diameter reduction of the electromagnet by bringing the positions of the inlet pipe and the outlet pipe closer to the pipe axis than in the conventional case. It is intended to provide a multi-cavity klystron.

[0006]

According to the present invention, a plurality of resonant cavities are connected by a drift tube along an electron beam path, and an inlet taper is connected to the final resonant cavity via a pole piece. And a water cooling jacket is provided around the resonance cavity or the drift pipe, and a water cooling pipe is connected to the water cooling jacket. Further, a water cooling pipe is connected to the inlet taper of the collector. An inlet pipe and an outlet pipe of cooling water are attached, and a water cooling pipe connected to a water cooling jacket of a resonance cavity or a drift pipe is connected to the inlet pipe and the outlet pipe through a pole piece. It is a multi-cavity klystron.

[0007]

According to the present invention, the positions of the inlet pipe and the outlet pipe are closer to the pipe axis than in the prior art, and the connection member used conventionally is not required. As a result, the length of the water cooling pipe is shortened, and the high frequency action part and the collector. Spatial space near connecting parts
Becomes wider. Therefore, compactness is realized and the diameter of the electromagnet can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. That is, the multi-cavity klystron according to the present invention is constructed as shown in FIG.
Is a high frequency action part. The high-frequency acting section 21 has a plurality of resonant cavities 22 connected by a drift tube 23 along an electron beam path, and a pole piece 28 is connected to the final resonant cavity 22.
A collector portion 26 having an inlet taper portion 27 is connected via the. Then, the resonance cavity 22 or the drift tube 3
A water cooling jacket 24 is provided around the water cooling pipe 3, and a water cooling pipe 25 is drawn out from each water cooling jacket 24. An inlet pipe 29 and an outlet pipe 30 of cooling water are attached to the side of the inlet taper portion 27 of the collector portion 26, and the water cooling jacket 2 is attached to the inlet pipe 29 and the outlet pipe 30.
A water cooling pipe 25 drawn out from No. 4 penetrates the pole piece 28 and is connected thereto.

As a result, as is apparent from the drawing, the positions of the inlet pipe 29 and the outlet pipe 30 are closer to the pipe axis than in the conventional case, and the connecting members (11, 1 in FIG. 2) used in the related art are used.
Since 2) is not required, the length of the water cooling pipe 25 is also shortened, and the space space near the connection between the high frequency acting portion 21 and the collector portion 26 is widened. Therefore, compactness is realized, and the diameter of the electromagnet, which is the magnetic field generator, can be reduced.

[0010]

According to the present invention, the inlet port of the collector is
An inlet pipe and an outlet pipe of cooling water are attached to the side of the spacer part, and a water cooling pipe connected to a water cooling jacket of a resonance cavity or a drift pipe penetrates the pole piece to the inlet pipe and the outlet pipe. Since they are connected together, the size can be reduced and the diameter of the electromagnet can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a multi-cavity klystron according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a conventional multi-cavity klystron.

[Explanation of symbols]

21 ... High frequency acting part, 22 ... Resonance cavity, 23 ... Drift tube, 24 ... Water cooling jacket, 25 ... Water cooling pipe, 26 ...
Collector part, 27 ... Inlet taper part, 28 ... Pol peel
Su, 29 ... inlet pipe, 30 ... outlet pipe.

Claims (1)

[Claims] 1. A plurality of resonant cavities are connected by a drift tube along an electron beam path, and a pole piece is further connected to the final resonant cavity.
In a multi-cavity klystron in which a collector portion having an inlet taper portion is connected via a space, a water cooling jacket is provided around the resonance cavity or the drift tube, and a water cooling pipe is connected to the water cooling jacket. An inlet pipe and an outlet pipe of cooling water are attached to the side of the inlet taper portion of the collector portion, and a water cooling pipe connected to the water cooling jacket of the resonance cavity or the drift pipe is attached to the inlet pipe and the outlet pipe. A multi-cavity klystron, characterized by being connected through the pole piece.