摘要:
An image forming apparatus having an active mode of performing image formation and an electric power saving mode of reducing electric power consumption, the apparatus including: an electric power measuring portion which measures the electric power consumption of the apparatus; a storage portion which stores electric power consumption information per unit time of the apparatus in the electric power saving mode; and a control portion which computes, based on the electric power consumption measured by the electric power measuring portion, consumed electric energy of the apparatus during a period in which the apparatus is in the active mode, and computes, based on a length of period in which the apparatus is in the electric power saving mode and the electric power consumption information stored in the storage portion, consumed electric energy of the apparatus during the period in which the apparatus is in the electric power saving mode.
摘要:
A transport device includes a plurality of endlessly connected steps (1) so that these steps (1) circulate. One or more of the plurality of steps (1) have one or more weights (11) detachably attached thereto. These weights (11) are contained in the space surrounded by a tread (2), a riser (4), and a yoke (3) that form each of the steps (1), and supported on the rear surface of the tread (2) in a row by a channel member (12) of U-shape in cross section.
摘要:
An ion beam accelerating device includes an accelerating cavity including an accelerating cavity outer conductor having a space therein, two accelerating cavity inner conductors though which an ion beam passes and which penetrate respective side walls of the accelerating cavity outer conductor and are separated from each other by a gap in the accelerating cavity outer conductor, and a plurality of magnetic cores disposed in the accelerating cavity outer conductor and surrounding one or both of the accelerating cavity inner conductors. The ion beam accelerating device further includes a plurality of high frequency magnetic field generating units equal in number to the magnetic cores for inducing respective high frequency magnetic fields in respective ones of the magnetic cores, thereby generating an accelerating voltage across the gap so as to accelerate the ion beam passing through the accelerating cavity inner conductors. Alternatively, the magnetic cores may be divided into a plurality of groups of magnetic cores, and the ion beam accelerating device may include a plurality of high frequency magnetic field generating units equal in number to the groups of magnetic cores for inducing respective high frequency magnetic fields in respective ones of the groups of magnetic cores.
摘要:
The present invention is to provide a method and an apparatus which are able to inject a large amount of charged particles to a circular accelerator. In order to inject a large number of charged particles, the charged particle beams are injected into a region of a vacuum duct other than the region which is defined as having a height equivalent to the height of the injected beam and a width from the injected point in the vacuum duct to the symmetrical point to the injected point with respect to the geometrical center of the vacuum duct.
摘要:
The present invention provides apparatus for acceleration of a charged particle beam which includes energy means for altering the energy of a circulating beam circulating in the apparatus and means for extracting output beams from the apparatus. Control means are arranged to be operable to alter the energy of the circulating beam using the energy means so as to be able to extract output beams of at least two energies from the apparatus using the means for extracting. Thus there is provided an accelerator, and an extraction method therefor, which is capable of extracting a small diameter beam having a varying energy level. This facilitates improved medical irradiation treatment using the beam.
摘要:
An acceleration device for charged particles has an acceleration cavity through which passes a beam of the particles. High frequency power from a suitable source is transmitted to the cavity via a suitable transmission means (antenna) to transmit the energy to the particles and so accelerate them. The transmission means is controlled by a suitable control to control the coupling constant of the transmission means when power is applied. Also, the device may have a looped conductor in the cavity controlled by the control to couple to the field in the cavity and to extract power from the field, thereby to control the de-tuning of the applied power relative to the power transmitted to the particles. By controlling the coupling constant and/or the de-tuning, power may be transmitted efficiently to the beam of particles.
摘要:
A beam transfer system has a bending magnet, a quadrupole magnet for converging or diverging a beam, and a beam current monitor. The controller of an accelerator body for the beam transfer system has a beam current measuring apparatus, a quantity-of-control measuring apparatus for measuring a quantity of control such as an exciting current of a bending magnet, a quantity-of-control determining apparatus for determining the quantity of control of each component, a trigger generating apparatus for generating various trigger signals, and a main controller for determining the quantity of control and the control timing of every component.
摘要:
When accelerating charged particles on synchrotron acceleration basis by using a circular accelerator having a RF acceleration cavity, the detuned amount representative of an offset between oscillation frequency of a RF oscillator for the RF acceleration cavity and resoance frequency of the RF acceleration cavity and the RF power for supplying the charged particles with energy are controlled in compliance with changes in energy of the charged particles without changing the oscillation frequency. A great number of charged particles injected into the circular accelerator can be accelerated to the ultimate storage energy during the acceleration on synchrotron acceleration basis without causing charged particle beam loss.
摘要:
A transport device includes a plurality of endlessly connected steps (1) so that these steps (1) circulate. One or more of the plurality of steps (1) have one or more weights (11) detachably attached thereto. These weights (11) are contained in the space surrounded by a tread (2), a riser (4), and a yoke (3) that form each of the steps (1), and supported on the rear surface of the tread (2) in a row by a channel member (12) of U-shape in cross section.
摘要:
An electromagnet comprises a pair of magnetic pole 1a and 1b, a return yoke 3, exciting coils 4 and 5, etc. In an interior portion of a magnetic pole, plural spacers 2a-2g are provided putting side by side in a horizontal direction. Each of the spaces 2a-2g is an air layer and a longitudinal cross-section is a substantially rectangular shape and the space has a lengthily extending slit shape in a vertical direction against a paper face in FIG. 1. The plural spaces are mainly arranged toward a right side from a beam orbit center O and an interval formed between adjacent spaces is narrower toward the right side. The electromagnet having a simple magnetic pole structure and a wide effective magnetic field area in a case where a maximum magnetic field strength is increased can be secured.