Plant micro-beam irradiation experiment collimator and automatic sample changing device

Abstract

The invention discloses a plant micro-beam irradiation experiment collimator and an automatic sample changing device. The plant micro-beam irradiation experiment collimator comprises a cylindrical main body, a collimation hole and an elastic body, wherein the cylindrical main body comprises a solid part, a hollow part and an open part which are integrally formed along the height direction; the cross-sectional area of the entity part is matched with the cross-sectional area of a beam spot, the plurality of collimation holes are uniformly formed in the entity part, and the collimation holes penetrate through the entity part and are communicated with the hollow part; and the elastic body is arranged in the hollow part, a plurality of clamping grooves are formed in the elastic body, and the plurality of clamping grooves directly face the plurality of collimation holes one by one. According to the plant micro-beam irradiation experiment collimator, the collimation hole can equally divide a round-spot-shaped beam emitted by the existing irradiation equipment into a plurality of micro beams, so that a more accurate local irradiation experiment of the plant is realized, the effect of each part of a seed or each part of the plant in the growth and development process of the whole plant body can be researched in a targeted manner, and meanwhile, the mutagenesis mechanism of each position of the irradiated material can be conveniently researched.

Description

technical field [0001] The invention relates to a collimator, in particular to a collimator and an automatic sample changing device for plant micro-beam irradiation experiments. Background technique [0002] As a new mutagenic technology, heavy ion beam radiation has the characteristics of wide mutagenic spectrum and strong mutagenic ability. Mutagenesis technology is becoming more and more important for screening mutant strains. Compared with the traditional mutagenesis technology, the heavy ion beam has the following characteristics: ①High-LET rays produce dense ionization, resulting in DNA cluster damage in the nucleus, resulting in DNA double-strand breaks (Double-strandBreak, DSB), which The damage is not easy to repair, so it has a high relative biological effect (Relative Biological Effectiveness, referred to as RBE); ②The heavy ion beam can deposit a large amount of energy on its track when passing through the medium, and has a high energy transfer line density ( L...

AI Technical Summary

Problems solved by technology

[0003] In existing plant heavy ion irradiation breeding experiments, the beam current output by the irradiation equipment from the irradiation port is in the shape of a circular spot, and the irradiation area that it can reach is usually all materials in a uniform spot with a diameter of 3.5 cm. The beam spot can be adjusted moderately, but the degree of adjustment is limited. Only partial areas can always be irradiated, and more accurate local or even point position irradiation research cannot be carried out, such as only for the endosperm and endosperm of seeds. , or the buds of plant branches and other parts for local irradiation experiments

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