Abstract: A carbon body has a structure for producing a planar electron source in a simple manner; a process for producing the carbon body; and an electric field emission electron source using the carbon body. The carbon body is a thin layer having a front surface and a back surface, and at least the front surface is a continuous curved wall, as viewed in plan, having a netlike structure.

Abstract: A cold cathode display device, which has a small thickness and a large display area, in which an anode can be sufficiently distant from an extraction electrode to ensure a breakdown voltage and an electron beam diameter can be made sufficiently smaller than the size of a phosphor, and a method of manufacturing such a cold cathode display device. A focus electrode is added to conventional cold cathode display device. The focus electrode is located such that extraction electrodes and cathodes are interposed between the focus electrode and a back substrate. The focus electrode includes electron passage windows located opposite the cathodes and electron passage windows. The focus electrode is attached to, and supported by, the extraction electrodes via an insulating material with a distance being maintained between the focus and extraction electrodes.

Abstract: In a cathode ray tube including a cathode and a first and a second electrodes provided with an electron passing aperture, in which the first and the second electrodes are disposed in front of and coaxially with the cathode so that electron beam from the cathode passes through the electron passing aperture, the cathode voltage at the cutoff operation is set up from 50 V to 80 V on the basis of the first electrode to thereby realize a high luminance.

Abstract: Obtained are a carbon thin body having a structure making it possible to produce a planar electron source in a simple manner; a process for producing the carbon thin body; and an electric field emission type electron source using the carbon thin body. A carbon thin body that has a given thickness and is in the form of a thin layer having a front surface and a back surface, wherein at least in the front surface portion a curved wall is continuous, as is viewed in plan, to form an approximately netlike structure.

Abstract: In a color CRT having an in-line electron gun and a self-converging deflection yoke, a first quadrupole electro-magnetic coil is provided on the deflection yoke, and is wider at the screen side than at the neck side, and a second quadrupole electro-magnetic coil which is provided on the deflection yoke and which is wider at the neck side than at the screen side. The main lens of the in-line electron gun may have a cross section of a race-track shape. A deflection electrode provided for deflecting the side beams may be provided in the vicinity of the main lens of the in-line electron gun. A quadrupole electric-field lens may be additionally provided for correcting an astigma of the side beam, provided in the vicinity of the deflection electrode.

Abstract: In an in-line beam type CRT, at least one pair of quadrupole electromagnets and at least one pair of quadrupole electromagnets rotated by 45.degree. about a beam axis are provided around a neck portion of a deflection yoke. Further, electric field lenses for respectively applying quadrupole electric fields to beams are mounted to an electron gun. Thus, the CRT can provide satisfactory spot shapes over the entire surface of a screen thereof and hence achieve high resolution.

Abstract: An ion removing device includes an ion inducing electrode provided in a vacuum container in a deflection portion of an electron accumulating ring along an inner peripheral wall of the vacuum container, an ion removing electrode provided in the vacuum container near each of ports of the defection portion of the electron accumulating ring, and a power source for applying a voltage to both the ion inducing electrode and the ion removing electrodes. An ion removing method includes the steps of inducing ions trapped by a potential generated by an electron beam to ports of a deflection portion of an electron accumulating ring by forming an electric field in a vacuum container in the deflection portion, and removing the ions which have been inducted to the ports of the defection portion.

Abstract: A coil structure of a pulse electromagnet designed to enable adjustment of the position at which a current supply cable is connected to current introducing terminals as well as to the adjustment of the attachment position of conductor rods for connecting return yoke members, thereby enabling the inductance of the coil to be easily changed.

Abstract: A high speed pulse electromagnet of a charged particle accumulator having a structure for producing magnetic field components of at least four poles from the periphery to the center to make the orbital path for incident charged particles passed through a low speed pulse electromagnet coincide with the orbital path for stored charged particles.

Abstract: A high voltage pulse generator circuit is connected to a pulse electromagnet and a Blumlein charge circuit comprising a pair of coaxial cables or charge lines connected in parallel and each having an impedance of Z/2 is connected in series to a transmission line having an impedance Z. A power source is connected to the charge circuit via a switching device and a charging resistor, thereby enabling a reduction in the charging voltage.

Abstract: An apparatus for detecting the position of a charged particle in a duct pipe has a plurality of electrodes arranged in the duct pipe. Detection signals obtained in the electrodes are phase-delayed by predetermined amounts and then added to form an integral detection signal. The integral detection signal is input to a circuit which determines waveforms representative of the passage of the charged particle: namely, the D.C. component of the detection signal, fundamental wave component and a phase-shifted fundamental wave component. The position of the charged particle are determined from these components. A part of each electrode is formed of a dielectric member. Each electrode and an associated connector are covered by a double-shield structure with inner and outer shields, the electrode, the connector and the inner shield being electrically insulated from the duct pipe.

Abstract: A synchrotron apparatus comprising an RF accelerating cavity, a pair of bending magnets, a pair of focusing magnets, and a pair of defocusing magnets, respectively, for accelerating, bending, focusing, and defocusing the particle beam to accelerate and/or store the particle beam, and a beam-cooling high-frequency accelerating cavity for generating a high-frequency electromagnetic field of an even TM-mode number in relation to direction transverse to the particle beam to decrease energy dispersion of the particle beam.