Particle detector and its production process
AssigneeCommissariat a l'Energie Atomique
InventorPaul Farcy
Life of this patent
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Abstract
Particle detector, wherein it comprises a ceramic body in one piece in which are sealingly embedded two concentric tubular electrodes which define between them an annular chamber filled with pressurized gas, and the electrical wires connecting the electrodes to the outside of the body. The invention also relates to a process for producing a particle detector by the wet or dry route. The particle detector, which is more particularly a neutron detector can be used with particular advantage in the core of a nuclear reactor.
Claims18
A detector, for neutrons and the like, comprising a closed ceramic body in a single part within which are sealingly embedded two concentric tubular electrodes which define between them an annular chamber filled with pressurized gas, and electrical wires connecting the electrodes to the outside of the body.
A process for the production of a detector for neutrons and the like wherein it comprises the successive stages of constructing a subassembly incorporating two concentric tubular electrodes, a filling material which is rigid at ambient temperature being at least partly positioned between the electrodes in order to ensure the centering thereof, electrical connecting wires being connected to the electrode;
- moulding a ceramic material body on said subassembly in such a way that the latter is embedded in the body with the exception of one free end of the connecting wires, at least one vent traversing the body between the filling material and the exterior of the body;
- fluidizing the filling material by heating and discharging the fluidized material through the vent so as to define an annular chamber between the electrodes;
- introducing a pressurized gas into the annular chamber through the vent;
- and closing the vent by the melting therein of a plug of ceramic material of the same type as that constituting the body.
A process for the production of a detector for neutrons and the like wherein it comprises the successive stages of constructing a subassembly incorporating two concentric tubular electrodes, a filling material which is rigid at ambient temperature being at least partly disposed between the electrodes in order to ensure their centering, electrical connecting wires being connected to the electrodes and a ceramic rod being positioned within the inner electrode;
- constructing a body of a ceramic material of the same composition as that of the rod about the subassembly by heating with a torch in such a way as to embed the subassembly therein, with the exception of one free end of the connecting wires, providing at least one vent between the filling material and the outside of the ceramic body, fluidizing the filling material by heating and discharging the fluidized material through the vent in such a way as to define an annular chamber between the electrodes;
- introducing a pressurized gas into the annular chamber through the vent;
- and closing the vent by melting therein a plug of ceramic material of the same type as that constituting the body.
Dependencies are inferred from the claim text.