Particle localization detector

Claim 2

A particle localizaton detector which operates in the proportional regime, wherein said detector comprises a leak-tight chamber filled with a fluid and within said chamber an electrode of a first type constituted by at least one conducting wire and an electrode of a second type constituted by at least one conducting plate having the shape of a portion of a cylindrical surface having generating-lines which are parallel to the direction of said conducting wire, the contour of said conducting plate being such as to provide substantially a one-to-one correspondence between the position of a point of said wire and the solid angle which subtends said plate at said point and means for collecting the electrical signal which appears on said plate.

Claim 3

A detector according to claim 1, wherein said electrode of the first type is constituted by a single conducting wire and said electrode of the second type is constituted by two conducting plates insulated from each other and inscribed on said cylindrical surface having a circular cross-section and being coaxial with said conducting wire, each plate having an area which is defined by a diagonal line of said cylindrical surface when developed.

Claim 4

A detector according to claim 1, wherein said electrode of the first type is constituted by a single conducting wire and wherein said electrode of the second type is constituted by two conducting plates electrically insulated from each other and inscribed on said cylindrical surface having a circular cross-section and coaxial with said conducting wire, each plate having an area defined by a broken line having the shape of successive sawteeth, said sawteeth being parallel to said conducting wire.

Claim 5

A detector according to claim 3, wherein said leak-tight chamber of said detector has a longitudinal chamber window formed of material which is permeable to X-rays, said cylindrical surface having a corresponding longitudinal cathode window area parallel and adjacent to said chamber window.

Claim 6

A detector according to claim 3, wherein the sawteeth having a length substantially equal to that of the portion of plate which constitutes each half-cathode.

Claim 7

A particle localization detector which operates in the proportional regime, wherein said detector comprises a leak-tight chamber filled with a fluid and within said chamber an electrode of a first type constituted by at least one conducting wire and an electrode of a second type constituted by at least one conducting plate having the shape of a portion of a plane surface parallel to the direction of said conducting wire, the contour of said conducting plate being such as to provide substantially a one-to-one correspondence between the position of a point of said wire and the solid angle which subtends said plate at said point and means for collecting the electrical signal which appears on said plate.

Claim 8

A particle localization detector which operates in the proportional regime, wherein said detector comprises a leak-tight chamber filled with a fluid and within said chamber an electrode of a first type constituted by at least one conducting wire and an electrode of a second type constituted by at least one conducting plate having the shape of a portion of a plane surface parallel to the direction of said conducting wire, the contour of said conducting plate being such as to provide substantially a one-to-one correspondence between the position of a point of said wire and the solid angle which subtends said plate at said point and means for collecting the electrical signal which appears on said plate.

Claim 9

A detector according to claim 6, wherein the electrode of the first type is constituted by a plurality of parallel conducting wires located in the same plane and wherein the electrode of the second type is consituted by two sets of two half-cathodes, each set of half-cathodes being inscribed in a plane parallel to the plane of said wires, each half-cathode having the shape of a portion of a flat rectangular plate, said two half-cathodes each having an area defined by a broken line having the shape of successive sawteeth, said two half-cathodes of a given set being electrically insulated from each other.

Claim 10

A detector according to claim 7 wherein said sawteeth have a length substantially equal to the portion of said plate which constitutes each half-cathode.

Claim 11

A detector according to claim 6, wherein said electrode of the first type is constituted by a plurality of parallel coplanar conducting wires and wherein said electrode of the second type is constituted by a plurality of parallel coplanar conducting wires which are parallel to the plane of said electrode of the first type and placed on a first side of said electrode of the first type and by two half-cathodes inscribed in a plane parallel to the plane of said electrode of the first type, each half-cathode having the shape of a portion of a flat rectangular plate, said two half-cathodes each having an area defined by a broken line having the shape of successive sawteeth, said two half-cathodes of a given set being electrically insulated from each other.

Claim 12

A detector according to claim 9 wherein said sawteeth have a length substantially equal to the portion of said plate which constitutes each half-cathode.

Claim 13

A detector according to claim 6, wherein said electrode of the first type is constituted by a plurality of parallel coplanar conducting wires and wherein said electrode of the second type is constituted by a plurality of parallel coplanar conducting wires which are parallel to the plane of the electrode of the first type and plced on a first side of the electrode of the first type and by two half-cathodes inscribed in a plane parallel to the plane of the electrode of the first type, each half-cathode being constituted by n conducting right-angled triangles insulated from each other, the hypotenuse of each triangle of a half-cathode being adjacent to the hypotenuse of one of the two adjacent triangles of the other half-cathode and the long side of the right angle of said half-cathode being adjacent to the long side of the right angle of the second adjacent triangle which forms part of said other half-cathode and wherein said detector further comprises two arrays of n - 1 equal resistors mounted in series, each extremity of each array of resistors being connected to an amplifier, the short sides of the triangles of a given half-cathode being connected electrically to the point of connection of two consecutive resistors of a given array of resistors.

Claim 14

A detector according to claim 6, wherein the electrode of the first type is constituted by a plurality of parallel coplanar conducting wires and wherein the electrode of the second type comprises at least two half-cathodes disposed on the same plane parallel to said wires, each half-cathode being constituted by a plurality of conducting strips insulated from each other, one strip corresponding to one half-cathode being located between two strips corresponding to the second half-cathode, each strip being constituted by a succession of aligned conducting isosceles triangles joined together alternately at the apices and along the short sides thereof, all the strips corresponding to a given half-cathode being connected at one end to the same amplifier.