SU1455329A1 - Apparatus for viewing nuclear photo emulsion - Google Patents

Abstract

The invention relates to experimental particle physics and can be used for. Observations of traces of particles in a nuclear emulsion (JFE). The purpose of the invention is to reduce the size of the device without degrading the other parameters of the device. The invention is illustrated in FIG.

Description

 one

The invention relates to experimental physics of elementary particles and can be used in the methodology of nuclear photoemulsion (JFE) in the study of short-lived particles.

The purpose of the invention is to reduce the transverse dimensions of the device without degrading the resolution by changing the design of the illumination system and the formation system of mesoptical images of direct particle traces.

The drawing shows a device for viewing JFE, a cross-section I cut through one of the sectors of the system {forming meso-optical images | of direct tracks of particles. The device contains a source of 1x cd beam of light, a translucent mirror 2, three flat mirrors 3, a system 4 for moving and controlling the position of the SFE, a platform 5, two sectors of the system 6 forming mesoptical images of direct particle traces, two flat mirrors 7 for transferring meso- optical images per photodetector, two photodetectors 8 for reading the left and right mesoptical images of direct particle tracks, the rotation system 9 and the control of the rotation angle of the platform relative to the optical axis of the device and the display unit 10 and data records.

In the proposed device, two converging beams of light are formed, which intersect at a point on the optical axis of the device in the JFE median plane. The first beam is formed by a system of two mirrors 2 and 3, and the second beam is formed by a system of two mirrors: cal 3 and 3. The first convergent light beam shines the JFE layer along the axis of the first sector of the system for forming meso-optical images. The second converging beam of light shines through the layer of the JFE along the axis of the second sector of the mesopootic imaging system (not shown). Two converging beams of light do not lie in the same plane, although they intersect at the same point in the area of the JFE. This is necessary so that the two sectors of the mesoscopic imaging system 6 can be arranged in a row. The plane, in which the formation of the left mesoptical image of the direct trace of the particle takes place, passes through the mirror 3, the right sector of the system 6 and the photodetector 8 of the left mesoptical image.

The device works as follows.

The source I of the converging light beam includes, the system 4 for moving and controlling the position of the nuclear emulsion, the system 9 for turning and controlling the angle of rotation of the platform 9, the photodetector 8, and also the unit 10 for displaying and recording data. The translucent mirror 2 and three flat mirrors 3 of the system for forming two convergent beams of light, as well as two flat mirrors 7 and two photoreceivers 8, are aligned with respect to the sectors of the direct image meso-optical images 6

traces of particles. Using the rotation system 5 and monitoring the angle of rotation of the platform, the NFE viewing device is installed to search for traces of particles of a given orientation. Measurement results from two photodetectors 8 are entered into the display unit 10 and data are recorded, into which 4 JFE coordinates are transferred from the system at the time of measurement .

Example. The length of the sector of the meso-optical mirror is 80 mm, the distance from the SFE to the sector is 150 mm. The width of each sector is 10 mm. The number aperture of each sector is ot j “: 20. The resolution along the radial coordinate is Lr 2 μm, the resolution along the Z-coordinate is uZ 4 μm.

The technical advantage of the proposed device is to reduce the final dimensions of the system for forming mesoptical images of direct particle traces; and the mass of the specified system, as well as. reducing the cost of mezorptichebny mirrors by a factor of 5–6 without losing quality, because instead of a whole meso-optical mirror with an ellipse-shaped generator it can be made from one installation up to fiap sector mirrors.

Claims (1)

Invention Formula A device for viewing nuclear emulsion containing a system for forming a convergent light beam, a system for moving and controlling 0 five nuclear emulsion position, a system for forming mesoptical images of direct particle traces, two photodetectors, two mirrors of the optical system for transferring mesooptical images to photodetectors, a platform, a system for rotating and controlling the angle of rotation, a platform around the optical axis of the device, as well as a display and data recording unit, at the same time, photodetectors and two mirrors are fastened to the platform, which is so that, in order to reduce} | the device’s transverse dimensions, the system for forming me-i eo-optical images of direct particle tracks, is made in the form of two sectors cut out of a meso-optical mirror with an ellipse-shaped generator; point located on the optical axis of the device. in the median plane of the nuclear emulsion, and the system of forming a convergent light beam can be rotated around the optical axis and devices and contains a translucent mirror and three flat mirrors installed so that the optical axes of the two converging beams of light coincide with the corresponding optical axes of the two sectors of the system of forming meso-optical images of direct tracks. particles. 0 five 0