Abstract:
An electron deflection device responsive to an electrical input signal for producing an output signal includes a focusing array for producing a collimated electron beam input ribbon in the direction of a propagation axis, the input ribbon being elongated along an array axis perpendicular to the propagation axis, and being relatively thin along a deflection axis perpendicular to the array axis and to the propagation axis. The focusing array is preferably a linear array of gated cold cathode units with lens electrodes. The deflection device further includes first and second electrically conductive deflector faces, forming a deflection region therebetween and being disposed so that the propagation-axis passes through the deflection region. The deflection device further includes means responsive to the input signal for applying time varying potentials to the deflector faces so as to produce a modulated electric field in the deflection region for deflecting the input ribbon over the course of a temporal deflection cycle to produce a continuously modulated output ribbon. The deflection device further includes an anode section responsive to the continuously modulated output ribbon for producing an output signal.The output signal can be in the form of an electrical output signal or a chopped output ribbon suitable for input to a high power amplifier, such as a klystron, klystrode, traveling wave tube, distributed amplifier or a gigatron, or to a free electron laser.
Abstract:
The inventions relate to a group that includes means for directing charged particles, enabling the acceleration and interaction thereof, and producing radiation caused by their movement, namely a method for changing the direction of an accelerated charged particle beam, a device for implementing said method, a source of undulator electromagnetic radiation, a linear and a circular charged particle accelerator, and a collider and means for producing a magnetic field created by a stream of accelerated charged particles. The method and the device for implementing same are based on the use of a curved channel (1) for transporting particles, which is made from a material that is able to be electrically charged, and the formation of the same kind of charge on the inside surface of the channel wall as that of the particles. The characterizing feature of these inventions is that they require the maintenance of a condition that relates the energy and the charge of the particles to the geometrical parameters of the channel, in particular the radius R of curvature of the longitudinal axis (14) thereof, and to the electrical strength of the wall material. The other devices in this group include a device for changing the direction of a beam, which defines the trajectory of the particles inside these devices to produce the required shape according to the function of the corresponding device and focuses the beam. The technical result is the possibility of rotating the beam through large angles without loss of intensity, significantly simplifying the design, and also reducing the mass and dimensions of all the devices, particularly by obviating the need for magnets and supply voltage and control voltage sources for such devices.
Abstract:
Electron beam profile measurement method and system wherein a scanning system has a five-dimensional processing mechanism for measuring different cross sections of an e-beam profile in a path of the e-beam. Measurements are conducted using the scanning system by virtually dividing each cross section into a plurality of subsections and measuring independent current values of at least one wire (2) of the scanning system through which the electron beam passes from every pixel in each of the plurality of subsections. By providing relative movement between the scanning system and e-beam, e.g., moving the scanning system, the measured independent current values can be analyzed to obtain a distribution of current density of the cross-section of the e-beam.
Abstract:
The present invention relates to a particle therapy apparatus used for radiation therapy. More particularly, this invention relates to a compact isocentric gantry for delivering particle beams perpendicularly to a rotation axis of the gantry. The gantry comprises three dipole magnets. The angle of the last dipole magnet is smaller than 90° and a most preferred bending angle for this last dipole magnet is 60°.
Abstract:
The present invention relates to an electron column including an electron emission source and lenses, and, more particularly, to an electron column having a structure that can facilitate the alignment and assembly of an electron emission source and lenses. The electron column having an electron emission source and a lens unit according to the present invention is characterized in that the lens unit includes two or more lens layers and performs both a source lens function and a focusing function. Furthermore, the electron column is characterized in that the lens unit includes one or more deflector-type lens layers and additionally performs a deflector function.
Abstract:
An X-ray generation device which can be efficiently used is provided. The X-ray generation device 1 has an electron gun 3, a target unit T, a tubular portion 5, a reflected electron detector 31, and a coil unit 9, and the target unit T includes a plurality of targets 23, and a plurality of mark portions 27 having a predetermined location relationship with the targets 23 and each having a surface area larger than a surface area of the target 23, when viewed from a normal direction to principal faces of the target unit T.
Abstract:
A DA conversion device (10) includes a current output type DA converter (11), a high-speed operational amplifier (12) operating at a low voltage and configured to generate a voltage corresponding to an output current from the DA converter (11), and a buffer amplifier (13) connected to an output terminal of the high-speed operational amplifier (12) and operating at a high voltage. The device (10) also includes positive and negative floating power supplies (14a, 14b) separated from a power supply system (18a, 18b) and provided as power supplies for driving the DA converter (11) and the high-speed operational amplifier (12). A midpoint (14c) between potentials at the floating power supplies (14a, 14b) is connected to an output terminal of the buffer amplifier (13) to cause the DA converter (11) and the high-speed operational amplifier (12) to operate mainly based on an output voltage from the buffer amplifier (13).
Abstract:
The inventions relate to a group that includes means for directing charged particles, enabling the acceleration and interaction thereof, and producing radiation caused by their movement, namely a method for changing the direction of an accelerated charged particle beam, a device for implementing said method, a source of undulator electromagnetic radiation, a linear and a circular charged particle accelerator, and a collider and means for producing a magnetic field created by a stream of accelerated charged particles. The method and the device for implementing same are based on the use of a curved channel (1) for transporting particles, which is made from a material that is able to be electrically charged, and the formation of the same kind of charge on the inside surface of the channel wall as that of the particles. The characterizing feature of these inventions is that they require the maintenance of a condition that relates the energy and the charge of the particles to the geometrical parameters of the channel, in particular the radius R of curvature of the longitudinal axis (14) thereof, and to the electrical strength of the wall material. The other devices in this group include a device for changing the direction of a beam, which defines the trajectory of the particles inside these devices to produce the required shape according to the function of the corresponding device and focuses the beam. The technical result is the possibility of rotating the beam through large angles without loss of intensity, significantly simplifying the design, and also reducing the mass and dimensions of all the devices, particularly by obviating the need for magnets and supply voltage and control voltage sources for such devices.