Abstract:
The present invention relates to an X-ray tube. According to an aspect of the present invention, the X-ray tube includes: a first housing in which a first X-ray window is formed; a second housing which is rotatable around a rotational shaft installed inside the first housing; an anode which is installed on the rotational shaft inside the second housing and is placed at one side in the extension direction of the rotational shaft; an emitter which is installed on the rotational shaft inside the second housing, is placed at the other side in the extension direction of the rotational shaft, and emits electronic beams; a lens which is installed between the anode and the emitter and collects the electron beams from the emitter to the anode; and an electron beam deflecting unit which deflects the angle of the electron beams moving in a direction from the lens to the anode.
Abstract:
PURPOSE: A current control device and an electric field emission system including the same are provided to connect the current control device to an electric field emission device which emits electron in response to an applied voltage, thereby constantly maintaining a field emission current. CONSTITUTION: A field emission device (110) emits electron in response to an applied voltage. A current control device (120) is connected to the field emission device to control a field emission current. The current control devices comprises a first current control transistor (121), a second current control transistor (122), and a control logic (123). The first current control transistor forms a current path in response to a first gate voltage. The second current control transistor forms a current path in response to a second gate voltage. The control logic uses the first gate voltage to control the threshold of the field emission current. [Reference numerals] (110) Field emission device
Abstract:
PURPOSE: A vacuum window including a solar cell and a manufacturing method thereof are provided to prevent the temperature of a solar cell plate from being increased using a glass including high infrared light reflectivity and by separating the solar cell plate from a plate glass. CONSTITUTION: A vacuum window including a solar cell comprises a first and a second plate glass(201,203), a vacuum layer(205), and a solar cell plate(207). The first plate glass and the second plate glass are connected in vacuum, and the solar cell plate is formed on a second plate glass surface. The solar cell plate is separated from the first plate glass. The first plate glass is formed with a low emissivity glass including high infrared light reflectivity. The solar cell plate is formed as a semi transmission type and is comprised of inorganic materials such as silicon, CIGS, and CdTe. The second plate glass comprises a second plate glass(209) in the opposite direction to the vacuum layer, and an inert gas is injected between the plate glasses.
Abstract:
A Ge based MIT thin film, the MIT device, the method for manufacturing the same are provided to easily grow the material of the MIT thin film by using the Ge element material. The MIT device comprises the substrate(100), and the Ge base MIT thin film (300a), at least two electrode thin films(410a,420a). The Ge base MIT thin film is formed on the substrate and generates the discontinuity metal-insulator transition(MIT) in the transition voltage. The electrode thin film is contacted with the Ge base MIT thin film. The Ge base MIT thin film causes the discontinuity MIT by voltage or the applied current.
Abstract:
A three terminal MIT(Metal Insulator Transition) switch, a switching system using the same switch, and a method for controlling a MIT of the same switch are provided to control easily a discontinuous MIT jump by adjusting a voltage applied to a control electrode. A three terminal MIT switch includes a two terminal MIT element(100), an inlet electrode(200), an outlet electrode(300), and a control electrode(400). The two terminal MIT element causes discontinuous MIT at a transition voltage. The inlet electrode and the outlet electrode are connected to both ends of the two terminals MIT element. The control electrode is connected to the inlet electrode. The control electrode has an external terminal separated from an external terminal of the inlet electrode. The MIT of the MIT element is controlled by the voltage and current applied to the control electrode.
Abstract:
A rapid MIT(Metal-Insulator Transition) device, a MIT sensor using the device, and an alarm and a secondary battery explosion preventing circuit including the MIT sensor are provided to vary a transition temperature by changing an applied voltage or current. An MIT(Metal-Insulator Transition) thin film(300a) generates the rapid MIT at a transition temperature or a transition voltage. At least two electrode thin films(410a,420a) are comprised to be contacted to the rapid MIT thin film. A transition temperature and a transition voltage of the MIT device is changed by a temperature, a microwave, a pressure, a gas concentration or a voltage which is added to the electrode thin films.