Abstract: A sample head (50) for nuclear magnetic resonance whole-body tomography or localized in-vivo nuclear magnetic resonance spectroscopy comprises an RF coil (51) having a plurality of inductive sections in the form of metallic strips (53 to 60) and capacitive sections in the form of gaps (61 to 68) arranged alternately one behind the other in the direction of the RF current (I.sub.1), so that the field lines (72) of the magnetic RF field (H.sub.1) generated by the RF coil (51) extend in parallel to an axis (74) defined by the RF coil (51). The RF coil (51) forms a single unit with an outer jacket (52). The number of inductive and capacitive sections is such as to be just below that limit value above which the distribution of the field lines (71) of the electric RF field (E.sub.1) produced by the said RF coil (51) changes from a first distribution (75), where there is a plane (76) between each inductive section (55) and the said axis (74) in which the strength of the electric RF field (E.sub.

Abstract: A resonance system for ESR spectroscopy has a resonance cavity (23) which connected by axial slots (25) with chambers (24) coaxial to the resonance cavity (23). The resonance cavity (23) and the chambers (24) are located within a metallic screen (21). The wall sections (26) of the resonance cavity (23), separated by the axial slots (25), form the inductances of the resonance circuit, whereas the wall sections of the axial slots (25), located opposite one another, form the capacitances. The entire resonance system, including the screen, is made of metal and is, therefore, suitable for use at extremely low temperatures.

Abstract: A flat electron beam tube includes a gas-filled enclosure containing two mutually parallel front and rear plates, a control plate subdividing the enclosure and extending, parallel to the front and the rear plates, into a front chamber, a post-acceleration space, and a rear gas discharge space; the rear plate carrying a gas discharge cathode on an inner side thereof; the front plate carrying a luminescent layer excitable by electrons and a post-acceleration anode; the control plate carrying mutually parallel strip-shaped row conductors, and being formed with a number of regularly arranged electron inlet openings and mutually parallel, strip-shaped column conductors, and being formed with a number of regularly arranged electron outlet openings, the column conductors being disposed crosswise to the row conductors, and the electron outlet openings being associated, respectively, by means of cutouts formed in the control plate, with given electron inlet openings; the row conductors being connected successively to

Abstract: A flat cathode ray tube and method of using characterized by an evacuated chamber being subdivided into a guidance space and post deflection space by a control plate having row electrodes or conductors on one side and column electrodes or conductors on the other side which column electrodes face a cathode-luminescent layer in the deflection space and a source for producing a flat electron beam being positioned at the side of the guidance space. In controlling the beam, a beam guidance electrode in the guidance space is utilized so that the beam will move in a sinuous path and strike each of the selected row conductors with the desired angle. To accomplish this feature, the wave length of the path of the flat beam for adjacent rows is changed so that the beam is deflected from the same position in the wave length.

Abstract: A gas-discharge display device for a flat and fluorescent screen is provided with at least one grid electrode between the matrix-driven control disc and the anode of the fluorescent screen for the specific field distribution in the acceleration space, the grid electrode or electrodes being connected to a respective fixed potential.

Abstract: The invention relates to a gas discharge display device of the plasma panel type comprising a gas filled gas-tight enclosure which contains a front plate, a rear plate, and a control plate subdividing the interior of the enclosure into two chambers. The control plate bears, on its two sides, electrode paths which are capable of being actuated separately, and forming row and column conductors respectively, of a matrix, said control plate being perforated, together with these paths, at the intersection points of the matrix.In order to keep the front plate at a minimal distance of approximately 1 mm relative to the control plate, according to the invention, web-shaped spacing elements with an essentially constant wall thickness are provided. The spacing elements extend in the plane of the control plate, are led past the perforations of the control plate, and run, alternating in sections, essentially parallel to, or at an angle, respectively, to the matrix conductors facing the front plate.

Abstract: A gas discharge display device comprising a gas-filled, -gas-tight enclosure, an insulating matrix member dividing the housing into two chambers and comprising an insulating plate having a plurality of apertures therethrough, arranged in an array of rows and columns corresponding in number to a desired number of image points, a cathode electrode disposed in one chamber and extending parallel with the matrix plate, and a luminescent screen electrode disposed in the other chamber, a plurality of anode conductors disposed on the side of the plate facing said cathode electrode, and a plurality of control conductors disposed on the side of the plate facing the luminescent screen electrode. Each of the conductors extend around the edges of the associated apertures, with each of the conductors on one side being associated with a row of apertures, and each of the conductors on the other side being associated with a column of apertures.

Abstract: A gas-discharge display device for multi-colored data display in three basic colors, comprising a gas-filled, gas-tight enclosure, a board-like matrix control structure, dividing the enclosure into two chambers, which is in the form of an insulating plate having a plurality of apertures therethrough, arranged in an array of coordinate lines corresponding in number to a desired number of image points. A plasma electrode is disposed in one chamber and a luminescent screen electrode disposed in the other chamber. The control structure includes a plurality of anode conductors disposed on the side of said plate facing said plasma electrode, and a plurality of control conductors disposed on the side of said plate facing said luminescent screen electrode, with each of the conductors extending around the edges of the associated apertures.

Abstract: A discharge display device is constructed in the form of a plasma panel in which a gas-filled, gas-tight housing contains, as electrode system components of a primary gas discharge path, an insulating matrix having holes therein spaced at regular intervals in accordance with the number of image points as a carrier of two divided electrodes assigned to the discharge cells. The divided electrodes include metal conductor paths arranged, for example, in rows and columns, in particular an auxiliary anode and a control electrode, and a common surface cathode is arranged in such a manner that electrons emerge from the individual holes of the matrix in a controlled fashion. The electrons enter respective d.c. gas discharge paths provided in an insulating hole matrix, which exhibits the same hole spacing and which is in registry with the first-mentioned hole matrix, and cause the individual, bombarded discharge cells to ignite.

Abstract: A low capacitance high speed signal storage plate for a signal storage tube with a raster of insulating areas of 1 .mu.m or greater thickness, and process for producing same. The insulating areas may be individual islands on a conductive plate, islands supported by projections extending from the plate, an integral layer supported by such projections, or islands carried on doped portions of a semiconductive plate.

Abstract: A luminous discharge device having a gas filled, gas tight envelope. A cathode is disposed at one side interiorly of the envelope and a luminescent target is disposed at the opposite side of the envelope. An insulating substrate is perforated in the form of a matrix and is positioned intermediate of the cathode and the luminescent target. The insulating plate has a series of rows of anodes disposed on one side thereof and a series of columns of controlled electrodes arranged at the other side thereof in a direction which is generally perpendicular to the anodes. The spacing between the anodes and the cathode is of such a value as to induce a normal gas discharge therebetween while the spacing between the controlled electrodes and the luminescent target is arranged to be such as to prevent a normal gas discharge.

Abstract: An electron beam tube for time multiplexing a plurality of signal channels on an extremely high frequency carrier includes an electron gun, a deflection system for causing the electron beam generated by the electron gun to sweep in a circular path past a plurality of individual electrodes which are excited with signals corresponding to the signals of individual channels, for modulating the beam with the channel signals, and a target for collecting the modulated beam to produce a time multiplexed output signal. The output signal may be amplified within the tube.