171results about How to "Improve irradiation efficiency" patented technology

An electron beam apparatus, in which an electron beam emitted from an electron gun having a cathode and an anode is focused and irradiated onto a sample, and secondary electrons emanated from the sample are directed into a detector, the apparatus further comprising means for optimizing irradiation of the electron beam emitted from the electron gun onto the sample, the optimizing means may be two-stage deflectors disposed in proximity to the electron gun which deflects and directs the electron beam emitted in a specific direction so as to be in alignment with the optical axis direction of the electron beam apparatus, the electron beam emitted in the specific direction being at a certain angle with respect to the optical axis due to the fact that, among the crystal orientations of said cathode, a specific crystal orientation allowing a higher level of electron beam emission out of alignment with the optical axis direction.

Disclosed is a high-frequency heating device comprising: a plurality of high-frequency power generating units (101a, 101b, 101c), each of which generates high-frequency power; and a controller (150) that sets a combination of the different frequencies of the high-frequency power generated by the plurality of high-frequency power generating units (101a, 101b, 101c) for the plurality of high-frequency power generating units (101a, 101b, 101c). Back-flow power detection parts (108a, 108b, 108c) in the plurality of high-frequency power generating units (101a, 101b, 101c) individually detect the reflected power and the through power. Based on the phase and amplitude of the reflected power and through power that were detected, the control part (150) determines the combination of the different frequencies of the high-frequency power generated by the plurality of high-frequency power generating units (101a, 101b, 101c) when heating an object to be heated.

The invention provides a single-cycle multi-step active variable energy and slow extraction method of synchrotrons. The method comprises a step of injecting a beam current and then accelerating beam current energy to a maximum value, a step of decelerating the beam current to a first energy value E1 and performing slow extraction and stopping the extraction when the number of extracted particles reaches a predetermined number, a step of continuously decelerating the beam current to a second energy value E2 and performing slow extraction and stopping the extraction when the number of extractedparticles reaches a predetermined number, and a step of continuously lowering the energy value of the beam current step by step and performing slow extraction until a predetermined number of particleshaving an energy value En are obtained. According to the method, the utilization efficiency of the beam current can be greatly improved, the pollution and waste of the beam current are reduced, sinceactive variable energy is used and a degrader is not used, the beam current does not interact with the degrader, no nuclear fragments are generated and the spot size does not change with the thickness of the degrader, since the active variable energy can be achieved in a single cycle, the times of beam current injection, acceleration, and power supply zeroing can be omitted, the irradiation timecan be shortened, and the irradiation efficiency can be improved.