Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Patrick Magnier

Ioannis Giomataris

David Attie

Jacques Derre

A device for circulating a gas in a closed circuit, has an upstream end and a downstream connected to the circuit, the device including: a first chamber defining a first internal volume and having an at least partially conical shape having a minimum diameter situated at a level of the upstream end; a second chamber defining a second internal volume and positioned downstream of the first chamber and having an at least partially conical shape having a minimum diameter situated at a level of the downstream end; an impeller including blades arranged regularly around an axis of rotation, the impeller positioned between the first and second chambers; and a rotation device to rotate the impellers. The first internal volume is larger than the second internal volume. The conical shape of the first chamber has an angle (&#x3b1;) smaller than the angle (&#x3b1;) of the conical shape of the second chamber.

Device for circulating a gas in a closed circuit

A device for detecting includes a cathode forming a hollow sphere, filled with an ionisation and amplification gas, and an anode placed at the centre of the hollow sphere by the intermediary of a maintaining cane, wherein the anode is formed by an insulating ball and by at least two conductive balls positioned around the insulating ball and at the same predetermined distance from the insulating ball.

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Orsay, France

Patrick Magnier