Apparatus for examining samples by electron emission
First Claim
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1. An apparatus for the examination of solid sample by stimulated electron emission, which comprises:
- an enclosure;
an insulating support located within the enclosure and having at least one face, at least a part of the face being coated with a conductive material to form a network of meshes, the meshes defining a first set of axes and the network of meshes comprising a cathode;
a plurality of anodes located within the enclosure and being insulated from one another and polarized with respect to the cathode, the anodes further being in the form of points, the points defining a second set of axes, the second set of axes coinciding with the first set of axes and the points being set back with respect to the conductive mesh network;
the enclosure defining an opening positioned beyond the anodes with respect to the conductive mesh network, the opening serving to house said sample;
a closure member which comprises said sample which closes said enclosure and with sealing means interacting with said enclosure to form a tight seal;
filling means for filling the enclosure with a multiplying gaseous medium; and
excitation means to apply an excitation to the sample.
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Abstract
The invention relates to the examination of samples which, by thermal or photon excitation, are able to emit electrons. These electrons are detected and located by a counter incorporating a cathode forming a mesh network. Pointed anodes coincide with the axes of the meshes. The enclosure of the apparatus is sealed by the sample and its excitation means. The invention can be used in dosimetry or in the checking of surface states.
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10 Claims
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1. An apparatus for the examination of solid sample by stimulated electron emission, which comprises:
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an enclosure; an insulating support located within the enclosure and having at least one face, at least a part of the face being coated with a conductive material to form a network of meshes, the meshes defining a first set of axes and the network of meshes comprising a cathode; a plurality of anodes located within the enclosure and being insulated from one another and polarized with respect to the cathode, the anodes further being in the form of points, the points defining a second set of axes, the second set of axes coinciding with the first set of axes and the points being set back with respect to the conductive mesh network; the enclosure defining an opening positioned beyond the anodes with respect to the conductive mesh network, the opening serving to house said sample; a closure member which comprises said sample which closes said enclosure and with sealing means interacting with said enclosure to form a tight seal; filling means for filling the enclosure with a multiplying gaseous medium; and excitation means to apply an excitation to the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification