摘要:
High voltage high current regulator circuit for regulating current is interposed between first and second terminals connected to an external circuit and comprises at least one main-current carrying cold-cathode field emission electron tube conducting current between the first and second terminals. First and second grid-control cold-cathode field emission electron tubes provide control signals for first and second grids of the at least one main-current carrying cold-cathode field emission electron tube for positive and negative excursions of voltage on the first and second terminals, respectively. The current regulator circuit may be accompanied by a voltage-clamping circuit that includes at least one cold-cathode field emission electron tube. At least two cold- cathode field emission electron tubes, configured to operate at high voltage and high current, are preferably contained within a single vacuum enclosure and are interconnected to provide a circuit function, so as to form a high voltage high current vacuum integrated circuit.
摘要:
A combination includes an AC power system and a system for improving power factor in the AC power system by continuously variable, analog control of level of reactive current introduced into a power conveying line of the AC power system. A power factor-improving circuit includes at least one channel that comprises a channel-level AC electron tube circuit and at least one associated reactive impedance element interconnected in series manner. Each of the channel-level AC electron tube circuit is responsive to a control system for continuously variable, analog control of the level of reactive current in the at least one associated reactive impedance element so that the foregoing level of reactive current changes, as necessary, in a continuously variable, analog manner to improve power factor in the power conveying line. Each of the channel-level AC electron tube circuit comprises at least one cold-cathode field-emission electron tube.
摘要:
Disclosed is a system for producing electromagnetic radiation with enhancement from a drift tube containing a cylindrical Smith-Purcell structure. The system includes a magnetically insulated linear oscillator. The oscillator includes a cylindrical resonant cavity having a traveling wave electron gun and a cooperating anode. The drift tube is formed of a hollow cylindrical conductive element that is positioned within a resonant cavity of the oscillator. The drift tube includes an inner surface and a pair of ends. The drift tube may be adapted such that the interaction between an electron beam, from the electron gun, passes through the inner space of the drift tube, and the internal grating, so as to produce RF radiation by the Smith-Purcell Effect. Spacing, face angle and shape of the grating, and the energy of the electron beam are determinants of the frequency of the RF radiation.
摘要:
High voltage high current regulator circuit for regulating current is interposed between first and second terminals connected to an external circuit and comprises at least one main-current carrying cold-cathode field emission electron tube conducting current between the first and second terminals. First and second grid-control cold-cathode field emission electron tubes provide control signals for first and second grids of the at least one main-current carrying cold-cathode field emission electron tube for positive and negative excursions of voltage on the first and second terminals, respectively. The current regulator circuit may be accompanied by a voltage-clamping circuit that includes at least one cold-cathode field emission electron tube. At least two cold- cathode field emission electron tubes, configured to operate at high voltage and high current, are preferably contained within a single vacuum enclosure and are interconnected to provide a circuit function, so as to form a high voltage high current vacuum integrated circuit.
摘要:
Disclosed is a method for detecting one or both of the native material in an object and any foreign material in the object by parallel-mode spectroscopy, comprising parallel- mode data acquisition, signal processing and data reduction and providing results. Parallel-mode data acquisition comprises producing an interrogating signal simultaneously containing electromagnetic radiation of sufficient bandwidth in the range of approximately 10 GHz to approximately 25 THz to allow simultaneous detection of a plurality of signals at a plurality of frequencies, each signal being at some amplitude, which collectively provide a unique spectral signature of a material whose detection is desired. The signal processing and data reduction comprises processing a signal resulting from exposing the object to the interrogating radiation to produce a three- dimensional data matrix representative of at least any foreign or native material associated with the object. Correlation technique is used to compare the data matrix to a reference library.