JPH0666531B2 - Target support device for X-ray laser - Google Patents

Description

TECHNICAL FIELD The present invention relates to a recombination type target support device for an X-ray laser, which uses laser light as an excitation source.

[Conventional technology]

Various proposals have been made at present for an X-ray laser, but the method most developed and considered to have a high potential is a recombination type using a laser beam as an excitation source. The latest research results are as follows: Bungen (“X-ray laser experiment at the Rutherford Appleton Research Institute” Toshihisa Tomie, IEICE Technical Committee Material EP-87-13-23, 83-90, February 1987. See the 21st), and the amplification effect has already been confirmed, and it is considered that it will be practically used soon. The outline is to obtain a population inversion required for an X-ray laser when a fibrous target is irradiated with laser light to be turned into plasma, and the plasma is expanded and cooled. Therefore, a large gain can be obtained in the direction along the fibrous target, and an X-ray laser output can be obtained.

[Problems to be solved by the invention]

In the above-described X-ray laser, the thickness of the fiber-shaped target is only a few microns, and it is necessary to accurately line-focus the excitation laser light on this. Further, since the gain is obtained in the direction along the fibrous target, in order to obtain a sufficient gain, the fibrous target must be strictly linear, and that direction is the direction of the X-ray laser. Determine the output direction.

As can be seen from the above, in order to put this X-ray laser into practical use, it is important how accurately the fibrous target is supported linearly at a predetermined position.

If it is sufficient to simply support the fibrous target in a straight line, both ends of the fibrous target may be simply pulled. The simplest example is shown in FIG.

That is, one end 11a of the fiber 11 is fixed to the fixing portion 12,
The weight 14 is lowered to the other end 11b via the pulley 13 and a pulling force is applied to fix the fiber 11 linearly at a predetermined position.

However, this method cannot be applied to X-ray lasers. The reason is that the X-ray laser output cannot be extracted from the fiber 11 because the pulley 13 exists in the laser extraction direction. Therefore, in the examples up to now, such as literatures, it is the current situation that only one end 11a of the fiber 11 is fixed and made to stand by itself. This method has a problem that it is difficult to linearly support the fibrous target formed by the fiber 11 over a long distance, and thus it is not possible to obtain a high gain.

The present invention has been made to solve the above problems, and an object thereof is to obtain an X-ray laser target supporting device that linearly supports a fibrous target at a predetermined position over a long distance.

[Means for solving problems]

The target support device for X-ray laser according to the present invention is
A fibrous target is penetrated through one electrode of a pair of electrodes set at a predetermined interval, and the tip end portion is positioned at a predetermined distance with respect to the other electrode. A through-hole for taking out a laser generated from the target is formed, and a high-voltage power source for generating an electric field between a pair of electrodes is provided to hold the fiber-shaped target on a straight line.

[Action]

In the present invention, the electric field applied by the high-voltage power supply generates an electric field between the pair of electrodes, and the electric field holds the fibrous target linearly.

〔Example〕

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention, showing a target supporting device of a recombination type X-ray laser using a laser beam as an excitation source. The means for line-focusing the excitation laser light is omitted.

In this figure, reference numeral 1 is a fiber-shaped target made of carbon, other conductors, insulators or the like, which is used to extract an X-ray laser. 2, 3 are electrodes, 4 is a high voltage power source connected to each of the electrodes 2, 3 and 5 is a through hole for extracting the X-ray laser light, which is formed in the electrode 3, and has an opening diameter of each of the electrodes 2, 3. It is sufficiently smaller than the size of 3 and the distance between the electrodes 2 and 3. Reference numeral 6 denotes a roller for sending out the fibrous target 1.

In the recombination type X-ray laser target supporting device configured as described above, the fibrous target 1 is moved between the electrodes 2 and 3 from the back side 2a of the electrode 2 through the through hole 2b of the electrode 2 by the rotation of the roller 6. Sent to. Fiber target 1
The rear end portion 1a is fixed by the roller 6 so as to be freely drawn out, but the front end portion 1b is not fixed and is a free end, and the distance between the front end portion 1b and the electrode 3 is set to a predetermined distance. Has been done. An electric field is generated by applying a voltage between the high voltage power source 4 and the electrodes 2 and 3, and the generated electric field can be easily calculated. The electric force line is shown by a broken line in FIG. Will be things. As is clear from this, the fibrous target 1 has electrodes 2, 3 formed on parallel plates.
The electrode 2 is erected in the form of being pulled along the straight line of electric force at and is held straight.

Therefore, when the pumping laser (not shown) is line-focused on the target 1, a gain is generated in the length direction of the target 1 to generate X-ray laser light, which is taken out from the through hole 5. The target 1 is paid out by the roller 6 according to the wear of the tip portion of the target 1.

〔The invention's effect〕

As described above, the present invention allows one end of a pair of electrodes set at a predetermined interval to penetrate a fibrous target and positions the tip portion at a predetermined distance from the other electrode. At the same time, a through-hole is formed in the other electrode to take out the laser generated from the fiber-shaped target, and a high-voltage power supply that generates an electric field between the pair of electrodes to hold the fiber-shaped target in a straight line is provided. Therefore, the fibrous target can always be oriented in the same direction and can be supported linearly, and there is no obstacle when taking out the X-ray laser output. Therefore, the alignment of the fibrous target is facilitated, and there is an effect that a highly efficient X-ray laser can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing an example of a conventional supporting system for linearly supporting a fiber. In the figure, 1 is a fibrous target, 2 and 3 are electrodes, 4 is a high voltage power source, and 5 is a through hole for extracting X-ray laser light.

Claims (1)

[Claims] 1. A supporting device for a fibrous target having a free end as a tip, wherein the fibrous target is penetrated through one electrode of a pair of electrodes set at predetermined intervals, While positioning the tip portion at a predetermined distance with respect to the other electrode, a through hole for taking out a laser generated from the fiber target is formed in the other electrode, and the fiber target is linearly formed. A high voltage power supply for generating an electric field between the pair of electrodes for holding the above X is provided.
Line laser target support device.