Detector plate for radiation analysis and method for producing same

Abstract

A detector plate includes a carrier plate, especially an injection-molded carrier plate, having a plurality of detector elements for detecting ionizing radiation. The detector elements function according to the principle of a Geiger-Mller counter. To simplify the production process and to save cost, the anode and/or the cathode should be in the form of a metallization on the carrier plate of the detector plate, the metallization(s) not being present in a single plane only. This configuration offers multiple options for designing the interior used as ionization chamber and for arranging the electrodes in this space. The options for contact with additional printed circuit boards also turn out to be highly advantageous. This further has an advantageous effect on the production process and on the qualities of the radiation measurement devices using detector plates of this kind.

Claims

1. A detector plate consisting of: an injection-molded carrier plate with a plurality of detector elements for detection of ionizing radiation, the detector elements being adapted for generating an electrical ionization current between an anode and a cathode of the respective detector element with indirect or direct ionization by the ionizing radiation in an inner cavity of the respective detector element; wherein the anode and/or the cathode is formed as an electro-conductive application not lying in a single plane on the injection-molded carrier plate; wherein the inner cavity is formed at least partly by a depression in the carrier plate, the depression of the respective detector element having an opening or two openings; each opening having one through-contact through the carrier plate.

2. The detector plate according to claim 1, wherein the electro-conductive application is a metalization, a carbonization, or a conductive ink.

3. The detector plate according to claim 2, wherein the anode and/or the cathode comprises at least two electro-conductive applications.

4. The detector plate according to claim 3, wherein the through contact formed by the at least two electro-conductive applications conducts an anode current or a cathode current externally from the inner cavity of the detector element.

5. The detector plate according to claim 1, wherein the anode and the cathode are at least partly bordering to the inner cavity.

6. The detector according to claim 1, wherein the inner cavity is partly bordering to a flat protective element, and the flat protective element partly or completely forms the anode or the cathode.

7. The detector plate according to claim 1, wherein the anode and/or the cathode is/are arched, or at least has/have two surfaces with differently oriented surface normals.

8. The detector plate claim 1, wherein detector elements are electrically connected with analysis circuits, wherein the analysis circuits are arranged, either partially or entirely, in a beam path relevant for the measurement and are shielded by means of shielding metalizations.

9. The detector plate according to claim 8, whereby the contact area spreads over a peg, and the peg is adapted to produce a conductive plug connection.

10. The detector plate according to claim 1, wherein detector elements are electrically connected with analysis circuits, wherein the analysis circuits are arranged, either partially or entirely outside the beam path relevant for the measurement.

11. The detector plate according to claim 1, wherein the anode and/or cathode is connected conductively with a contact area or has a contact area, wherein the contact area is arranged outside of an inner area.

12. The detector plate according to claim 1, wherein the carrier plate forms a counter arrangement to a ball grate contact by the through-contacts.

13. A radiation analysis device with a detector plate according to claim 1.

14. The detector plate according to claim 1, wherein the anode and/or the cathode comprises at least two electro-conductive applications.

15. The detector plate according to claim 14, wherein the through contact formed by the at least two electro-conductive applications conducts an anode current or a cathode current externally from the inner cavity of the detector element.

16. A process geared to produce a detector plate consisting of a carrier plate with a number of detector elements for detecting ionizing radiation with the following steps: producing the carrier plate by an injection molding process, non-cutting production and/or recasting, applying the electro-conductive applications used in the detector elements as anode and/or cathode, wherein at least one of the electro-conductive applications is not localized in a single plane; wherein the inner cavity is formed at least partly by a depression in the carrier plate, the depression of the respective detector element having an opening or two openings; each opening having one through-contact through the carrier plate.

17. The process according to claim 16, wherein the anode and/or the cathode is formed from at least two electro-conductive applications.

18. The process according to claim 17, wherein the at least two electro-conductive applications form a through-contact on the carrier plate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Shown are:

(2) FIG. 1 a first design example of a cut detector element in a production step shortly before contacting a conductor plate,

(3) FIG. 2 the detector element from FIG. 1 from the direction of the radiation intrusion,

(4) FIG. 3A,B one design example of a detector plate respectively,

(5) FIG. 4 a second design example of a cut detector element shortly before contact with a conductor plate,

(6) FIG. 5 the detector element from FIG. 4 from the direction of the radiation intrusion,

(7) FIG. 6 a schematic presentation of a plug connection between a detector element and a conductor plate,

(8) FIG. 7A,B possible shielding arrangements for shielding electrical or electronic components, especially of analysis circuits,

(9) FIG. 8 a detector plate with honeycomb detector elements,

(10) FIG. 9 a detector plate with rectangular detector elements, and

(11) FIG. 10 sectional view of a detector element with protective foil.

DETAILED DESCRIPTION OF THE FIGURES

(12) FIG. 3A and FIG. 3B present two possible detector plates 27 and 28, which can be set via corresponding arrangements of detector element 20 on the radiation profile to be measured. In this way, a number of applications can be considered through the corresponding resolution of any two-dimensional surface.

(13) It is of advantage if common conductor plates 47 can be connected with the detector element 50 by means of the described method, whereby any switching circuits on the paths of the ball grate contact can be used with a number of detector elements 50 or different detector elements. Only through the similar arrangement of all contact areas 46 and all balls used 45, is it possible to have simultaneous multiple contacts in one work step.

(14) The electronic component 49 should only be regarded as an example of the range of possible components, such as an electrometer amplifier, just like the type of electrical connection with the conductor plate 47 that is guaranteed here via contact legs 51 and solder points 52, and which can be replaced by other connections.

(15) The ionizing radiation follows the radiation direction B through the metal plate 40 in the inner cavity 43, which, with corresponding thickness only marginally absorbs the ionizing radiation. Alternatively, a radiation direction B can be chosen that reaches through carrier plate 41, whereby only an absorption-resistant plastic hinders the ionizing radiation.

(16) FIG. 6 shows a conducting plug connection between a cathode 64 that was metalized in a detector element. The opening 65 shows a through-contact of cathode 64, that continues on an extension 63, arranged directly next to opening 65. On the pegs 63, the metalization forms a contact surface 66 that contacts conductively a counter-contact surface 68 as soon as the pegs 63 are clamped in the opening 62 of conductor plate 67. The electrically contacting plug connection 60 can thus be brought about by simply plugging the conductor plate 67 onto the detector elements, whereby the grate arrangement, another very advantageous production benefit occurs, especially as further steps must not be undertaken for electrical contact or attachment.

(17) The honeycomb of the detector elements 81 leads to an extremely effective arrangement, whereby almost the entire surface of the carrier plate of detector plate 80 can be used as an electron surface or a detector surface. In this way, only a very small part of the surface of the carrier part is left unused.

(18) In all embodiments, carrier plate 11, 41 can be manufactured through an injection molding process, as well as through non-cutting production and/or molding. In principle, injection molding is advantageous where greater complexity is involved. However, for example, carrier plate 11 shown in FIGS. 1 and 2 are manufactured through a pressing or stamping process (molding), followed by drilling the openings 14, 15 (cutting production).

(19) In summary, the invention concerns a detector plate consisting of a specially injection-molded carrier plate with a number of detector elements for detecting ionizing radiation. The detector elements function according to the principle of a Geiger-Mller counter, whereby the invention also suggests, in order to simplify the production process and reduce costs, that the anode and/or cathode is not formed in a metalization process lying in a single plane on the carrier plate of the detector plate. This leads to many possibilities to form the inner cavity used as ionization chamber, and to arrange the electrodes in this area. The contact possibilities with further circuit boards also prove extremely advantageous. This also has an advantageous effect on the production process and on the quality of the radiation measuring devices that use such detector plates.

DESIGNATION LIST

(20) B Radiation direction D1 First high-voltage distance D2 Second high-voltage distance 10 Protection foil 11 Carrier plate 12 Anode 13 Cathode 14 First opening 15 Second opening 16 Inner cavity 17 Conductor plate 18 Contact movement direction 20 Detector element 21 Second conductor path 22 First conductor path 23 Ball 24 Ball 25 Contact area 26 Contact area 27 Detector plate 28 Detector plate 40 Cathode formed as metal plate 41 Carrier plate 42 Anode 43 Inner cavity 44 Opening 45 Ball 46 Contact area 47 Conductor plate 48 Conductor path 49 Electrical structural element 50 Detector element 51 Contact leg 52 Solder point 60 Electrically contacting plug connection 61 Conductor path 62 Plug opening 63 Peg 64 Cathode 65 Opening 66 Contact surface 67 Conductor plate 68 Counter-contact surface 69 Carrier plate 70 Shielding arrangement 71 Conductor plate 72 Copper shielding 73 Ball 78 Electronic structural element 80 Carrier plate 81 Detector element 82 Synthetic resin 83 Shielding 84 Metal insert 85 Opening 86 Metalization 90 Carrier plate 91 Detector element 100 Detector element 101 Anode 102 Cathode 104 Pin 105 Inner cavity 106 Contact area 107 Contact area 108 Opening 109 Opening