Abstract:
A photomultiplier tube comprises an evacuated envelope having a photoemissive cathode therein. A cage assembly including an anode and a plurality of closely spaced dynodes are within the envelope. The anode has at least one support rod. Each of the dynodes has a pair of dynode tabs formed in the ends thereof. A pair of dynode support spacers having a plurality of stress isolation apertures and electrode support apertures formed therethrough are provided for supporting the dynodes and the anode. The dynode tabs and the anode support rod extend through the electrode support apertures. A plurality of deformable stress isolation eyelets comprising a tubular shank with a flare formed in one end of the shank are disposed within a different one of the stress isolation apertures. The flare diameter is greater than the diameter of the stress isolation apertures thereby retaining the eyelets within the apertures. A second end of the tubular shank, opposite the flared end, extends outwardly from the dynode support spacers. The outwardly extending end portion is crimped to lock the eyelets within the stress isolation apertures. Nickel leads are provided for flexibly interconnecting the crimped end portion of a different one of each of the eyelets to one end of each of the dynodes and to one end of the anode support rod. A stem closes one end of the envelope. A plurality of relatively stiff cage assembly support leads extend through the stem and are welded to the crimped end portion of the eyelets thereby firmly securing the cage assembly to the support leads and indirectly connecting the support leads to the dynodes and the anode.
Abstract:
A low volume, lightweight, high voltage electron gun having an overall size and weight of approximately 50% the size and weight of a conventional electron gun of the same output. This is accomplished by interposing between the cathode and the walls of the housing of the electron gun a thin piece of dielectric material of preselected breakdown strength. The dielectric material is in direct contact with both the cathode and the housing of the electron gun, with the voltage stress between the walls of the housing and the cathode being such that it does not exceed the breakdown strength of the dielectric material.
Abstract:
Certain embodiments described herein are directed to devices that can be used to align the components of a source assembly in a source housing. In some examples, a terminal lens configured to couple to the housing through respective alignment features can be used to retain the source components in a source housing to provide a source assembly.
Abstract:
The system comprises: - several main photovoltaic generators (Gp1-Gpn), - several additional photovoltaic generators (Ga1-Gan), each one made up of several photovoltaic generator blocks (B1-Bn) - several inverters (I1-In) intended to convert direct voltage/current into alternating voltage/current, - several switching means (Sw1) arranged between the outputs of the main generators (Gp1-Gpn) and the inputs of the inverters (I1-In), - several second switching means (Sw2) arranged between the outputs of the generator blocks (B1-Bn) and the outputs of the additional generators (Ga1-Gan), and - several means to automatically control both switching means (Sw1. Sw2) to selectively connect/disconnect the outputs of the main generators (Gp1-Gpn) and of the generator blocks (B1-Bn) to/from the inputs of the inverters (I1-In), The method is provided to carry out said automatic control of the switching means.
Abstract:
Diese Ladungsteilchenkanone besitzt einen Bolzen, an dem eine Ladungsteilchenquelle angebracht ist, eine Mutter, die mit dem Bolzen zusammengeschraubt ist und dadurch die Ladungsteilchenquelle hält, und eine Mutternsitzoberfläche, die mit der Mutter in Kontakt steht. Die Mutter enthält einen Neigungseinstellabschnitt, wobei es möglich ist, den Neigungswinkel der Ladungsteilchenquelle in Bezug auf die Mutternsitzoberfläche einzustellen, und einen Arretierungsabschnitt, der verhindert, dass sich die Mutter und der Bolzen, wenn sie zusammengeschraubt sind, lösen. Die innere Oberfläche der Mutter besitzt einen Schraubengewindeabschnitt und einen schraubengewindefreien Abschnitt mit einem größeren Innendurchmesser als der Schraubengewindeabschnitt. Der Neigungseinstellabschnitt weist auf: einen ersten Schlitz, der so gebildet ist, dass er durch einen Bereich von einem Teil der äußeren Oberfläche der Mutter zu einem Teil des schraubengewindefreien Abschnitts durchgeht; eine Neigungseinstellschraube; einen ersten Teil, der zwischen dem ersten Schlitz und einer zweiten Oberfläche positioniert ist; einen zweiten Teil, der zwischen dem ersten Schlitz und einer ersten Oberfläche positioniert ist; und ein erstes Schraubenloch, das mit der Neigungseinstellschraube zusammengeschraubt ist
Abstract:
Dispositivo de conexión extraíble para la excitación de muestras con señales eléctricas de alta frecuencia a alto voltaje en microscopios de electrones. Manteniendo las condiciones de ultra alto vacío y que comprende una estructura soporte (18) con una sección en Y (6) con unas ramas (20, 21) y una sección común (19) destinada a acoplarse al microscopio, un cable (1) que discurre por el interior de la sección común (19) y la segunda rama (21) y que comprende unos conectores (2) destinados a conectarse al soporte para muestra (12), una barra de manipulación (3) de los conectores (2) y desplazable linealmente por el interior de la sección común (19) y la primera rama (20), y un transmisor lineal de movimiento (7) asociado a la sección común (19) y que se expande cuando el cable está desconectado y se comprime cuando se va a realizar la conexión.
Abstract:
Apparecchio 225 per accumulare/prelevare energia elettrica da un accumulatore elettrico posto tra pannelli fotovoltaici 201, 202 un inverter 217. Questo apparecchio elettronico di potenza in corrente continua dispone preferibilmente di un dispositivo wifi connesso al web per la gestione di flussi di energia generati da impianto fotovoltaico con l’ausilio di accumulatori elettrici e prese intelligenti atte a migliorare l’autonomia energetica. Detto apparecchio comprende preferibilmente un convertitore bidirezionale 225 costituito da degli elevatori di tensione 213, 214 con relativi misuratori di potenza 211, 212, da dei riduttori di tensione 207, 208 e relativi misuratori di potenza 205, 206, da un misuratore di livello carica 210, un microcontrollore 215 un modulo di trasmissione ricezione wifi 216. A detto apparecchio 225 è connesso mediante terminali un misuratore di potenza 220 dei pannelli fotovoltaici 201, 202 un inverter 217, un accumulatore 209 e mediante connessione wifi il display utente 221 ed gli utilizzatori (o prese) intelligenti 219. Tale apparecchio è configurato per convertire selettivamente il flusso di energia entrante ed uscente dall’accumulatore 209 e gestire gli utilizzatori intelligenti 219.
Abstract:
A cap can comprise an aperture, and an attenuator may block the aperture during at least one point in time. In one embodiment, the attenuator can include a cover that may be displaced by a spring. In another embodiment, such as an electron gun, may comprise a support cap with an aperture, a displaceable cover that may cover the aperture, and a spring. A material attached to the spring and acting as a fuse may release the spring and expose the aperture after an electrical current blows the "fuse". In yet another embodiment, a method for using a tube may comprise evacuating the tube while a cover covers an aperture in the support cap of a electron gun that is at least partially in the tube and moving the cover to expose the aperture after the tube is sealed.