Abstract:
PROBLEM TO BE SOLVED: To provide an ion mobility spectrometer improved in function and reliability, as well as small in number of parts and simple in manufacturing. SOLUTION: The ion mobility spectrometer, in which a reaction ionizing chamber and/or an ion drift tube is structured with one or more single piece of glass tubes, is disclosed. An inner face of the glass tube is structured to have electrical conductivity by heat processing and/or chemical processing. The glass tube is used as substitute for a stacked body formed by a metallic annular member and a ceramic annular member generally used in a device such as a spectrometer. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a photomultiplier tube in which condensing efficiency of radial rays incident, especially from the front side is improved, and the condensed radial rays can be connected much more efficiently to a photoelectric cathode, and has a high packaging density when assembled in an array, thereby imaging characteristics can be improved. SOLUTION: The improved condensing efficiency of the radial rays and the improved packaging density of the photomultiplier tube are obtained by combining many characteristics including that a taper is made at the edge of a face plate so that the face plate may demarcate a cross-sectional area same as or larger than the cross-sectional area of the photomultiplier tube, that the face plate and a metal tube are connected at the lower side of the face plate so that an optical path between the incident radial rays and the photoelectric cathode may not be obstructed, and that the tapered edge of the face plate may be used as a reflector for connecting the radial rays incident into the surroundings of the face plate to the photoelectric cathode. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a photodetector with excellent sensitivity. SOLUTION: This photodetector has a photomultiplier provided with a window for receiving incident light. A photoelectric negative electrode is bonded on an inner face of the window by a known manner. The photodetector has further an optical fiber, and a means for connecting the optical fiber to the window to introduce the light into the window at an angle of reflecting totally the light as its result. The connecting means is materialized as an optical fiber terminal connector. Alternatively, the connecting means may include a prism bonded onto an outer face of the window. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To allow a gating circuit to switch the responsivity of a photomultiplier tube between ON and OFF states by modulating the voltage bias of the one or more of its electrodes. SOLUTION: The gating circuit capacitively couples a voltage pulse to the photocathode 304 or other electrode of the photomultiplier tube 302 in response to a low-voltage triggering signal. A voltage divider 312 network and a high-voltage power supply used to statically bias the photomultiplier tube also power the gating circuitry and transmit a gating voltage pulse. The electrode gating pulse characteristics, including rise- and fall-times, voltage swing amplitude and duration, can be modified by adjusting resistor and capacitor values and Zener diode characteristics of the gating circuit and voltage divider network. The circuit can also be used to gate related devices such as microchannel plates and image intensifiers. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a reflectro lens for a time-of-flight mass spectrometer, a mass spectrometer using the above reflectro lens, a manufacturing method of the reflectro lens, and its device. SOLUTION: The reflectro lens includes a glass tube having a conductive surface along the length. The conductive surface has an electrical resistance gradient along its length. The electrical resistance gradient provides an electric field in the interior of the tube that varies in strength along the length of the tube when an electric potential is applied to both ends of the tube. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a replaceable and electronically-insulated micro channel plate electron multiplier-based spectrometer detector cartridge with enhanced sensitivity. SOLUTION: A mass detector is electro-optically isolated from a charge collector with the electron multiplier for converting a charged particle into a multiplicity of electrons and a scintillator for converting the multiplicity of electrons into a multiplicity of photons. A light sensor is provided to convert the multiplicity of photons back into electrons, which are summed into a charged pulse. The light sensor is realized by any of a plurality of photo-responsive devices. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a detector for a coaxial bipolar flight-time type mass spectrometer. SOLUTION: The detector comprises a microchannel plate, a scintillator provided in parallel with the microchannel, and a mirror oriented with an angle to the scintillator. The angle of the mirror is selected so as to reflect the photons emitted from the scintillator in the direction substantially right angle to the scintillator. The microchannel plate, the scintillator, and the mirror have respectively an aperture in the center. The detector has a transparent tube which extends penetrating through the central aperture formed respectively in the microchannel plate, the scintillator, and the mirror. A photomultiplier tube is coupled to the detector in order to receive the photons reflected by the mirror. A coaxial bipolar flight-time type analyzer incorporating the detector is also described. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method and an apparatus which has significant advantages over other methods, such as plasma and electron showers and plasma flood system, for neutralizing excess charge due to ion implantation. SOLUTION: A means of neutralizing the excess charge on workpieces, such as semiconductor wafers, that results from ion-implantation processes, wherein the excess positive charge on a small area of the workpiece surface is locally sensed, and in response, an appropriate dose of charge-compensating electrons is delivered from an electron emission source to the area of excess charge on the workpiece. A charge-sensing probe and a voltage-controlled electron generator array are configurationally and operatively coupled in a closed feedback loop, and are made to scan the surface of the workpiece, in close but non-contacting proximity to the surface of the workpiece. Arrays of charge-sensing probes and electron generator arrays can be configured for rapid coverage of the implanted areas of the workpiece. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a reflectron lens of a simple structure and enabled to be manufactured at low cost and at the same time, with sensitivity and resolution improved, and provide a direction inversion method of ion beams using the lens. SOLUTION: The reflectron-lenses 500, 600, 650 are composed of tubes, and the tubes have a continuous conductive face each along a longitudinal direction in order to provide inside the tube an electric field in which strength varies along the longitudinal direction. The tube may be formed of glass containing metal ions such as lead, and the conductive face can be formed by reducing the glass. As for the direction inversion method of the ion beams, the ion beams are introduced into a first end part of a dielectric tube having the continuous conductive face along the longitudinal direction of the tube, and an electric field gradient in which strength varies along the longitudinal direction of the tube is formed by applying electrical potential passing through the tube, and the ions are taken outside via the first end part of the tube by inverting the direction of the movement of the ions in that electric field gradient. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
A photomultiplier tube having an ion suppression electrode positioned between a photocathode and an electron multiplying device in the photomultiplier tube is disclosed. The ion suppression electrode includes a grid that is configured to provide sufficient rigidity to avoid deformation during operation of the photomultiplier tube. The photomultiplier tube also includes a source of electric potential connected to the electron multiplying device and to the ion suppression electrode to provide a first voltage to the second electrode and a second voltage to the suppression grid electrode wherein the second voltage has a magnitude equal to or greater than the magnitude of the first voltage. A method of making the photomultiplier and a method of using it are also disclosed.