Siemens Healthineers Ag

Siemens Healthcare Gmbh

Michael Wimmer

Joerg Freudenberger

Anja Fritzler

Peter Geithner

Stefan Stegmeier

Thomas Weidinger

Stefan Waffler

Christoph Jud

Andreas Hader

Florian Schwarz

Jan Berk

One or more example embodiments relates to a cathode device and an X-ray source. The cathode device for an X-ray source has an electron emitter including a plurality of field effect emitter elements aligned in parallel to form an emission surface on the upper side of the plurality of field effect emitter elements aligned in parallel a gate electrode, arranged above the emission surface, a multiple first contact elements for at least two independently current-carrying current paths of the electron emitter, electrons from at least one of the current paths are emittable depending on an emission voltage between the gate electrode and the emission surface via the field effect emitter elements; and an emitter seat including multiple second contact elements, the multiple second contact elements connectable with the multiple first contact elements for closing the current paths.

Cathode device with improved electron emitter contacting

A method for reducing electron emission of an electron emitter comprises: emitting electrons from a first current path via at least one first field effect emitter element, subject to an emission voltage between a gate electrode and an emission surface; determining a property of the first current path; and activating a first current limiting unit subject to the properties of the first current path to reduce the electron emission of the electron emitter.

Reducing an electron emission of an electron emitter

A two-phase cooling system for an X-ray high-voltage generator comprises a heat sink block and a heat sink. The heat sink block spatially surrounds a cooling duct loop, wherein the cooling duct loop is at least partially filled with a working medium and is configured to act as an oscillating heat pipe. The heat sink is configured to dissipate heat from a heat source. The heat sink block includes a material including a polymer.

X-ray high-voltage generator with an oscillating heat pipe

An X-ray high-voltage generator comprises: a circuit arrangement having at least one power electronics circuit part, wherein the at least one power electronics circuit part is configured to form a heat source during operation; and a two-phase cooling system having a heat sink. The at least one power electronics circuit part is directly thermally coupled to the two-phase cooling system to cool the heat source at the heat sink. The two-phase cooling system has a cooling element block that spatially surrounds a cooling channel circuit. The cooling channel circuit is at least partially filled with a working medium, and is configured to act as a heat pipe.

X-ray high-voltage generator having a two-phase cooling system

A power supply apparatus for an X-ray imaging apparatus includes grid connection device(s) to connect to a power grid providing an AC input voltage, including circuit protection arrangement(s) to not trip below a safety current; an actively actuatable transformer arrangement to transform the AC input voltage into a DC output voltage as a supply voltage for the X-ray imaging apparatus; an electrical energy storage system; and a control apparatus to actuate the transformer arrangement to limit power consumption from the electric power grid as a function of the safety current and make up for a deficiency of a power requirement for the X-ray imaging apparatus from the energy storage system. The control apparatus is configured to actuate the transformer arrangement for time-dependent limitation of power consumption from the power grid according to a current/time profile, the current/time profile being deduced from a time-based trip profile of the circuit protection arrangement.

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Weisendorf, Germany

Michael Wimmer