High-resolution compact gamma burst detector
View Patent ↗The invention relates to a plane detector for a gamma ray burst imager, the detector comprising a multilayer ceramic interconnection circuit between external connectors and a processor circuit fastened on a rear face of the circuit and a detection module fastened on a front face of the circuit. The detection module includes a support having a rear face fastened to the circuit and a front face on which sensors are fastened, and a high voltage electrical connection device having a through portion passing through the support and extending between two adjacent sensors in order to connect a connection pad of the circuit to a conductive grid that extends at least in part between the sensors and that is electrically connected to a free face of each sensor.
1. A plane detector for a gamma ray burst imager, the detector comprising a multilayer interconnection circuit between external connectors and a processor circuit fastened on a rear face of the circuit and a detection module fastened on a front face of the circuit, the detection module including a support having a rear face fastened to the circuit and a front face on which sensors are fastened, and a high voltage electrical connection device having a through portion passing through the support, wherein the electrical connection device extends between two adjacent sensors in order to connect a connection pad of the circuit to a conductive grid that extends at least in part between the sensors and that is electrically connected to a free face of each sensor.
2. The detector according to claim 1 , wherein the through portion of the electrical connection device includes a conductor wire having, between two bare end portions, a central portion that is covered in an insulating sheath in order to insulate it electrically from the support.
3. The detector according to claim 2 , wherein the conductor wire is made of aluminum.
4. The detector according to claim 1 , wherein the grid comprises connection pads ( 16 ) arranged to cover corners of four adjacent sensors.
5. The detector according to claim 1 , wherein the voltage applied to the sensors lies in the range −400 V to −800 V.
6. The detector according to claim 1 , wherein the components are assembled together by adhesive.
7. The detector according to claim 6 , wherein the adhesive used is of the epoxy and silver type.
8. The detector according to claim 1 , wherein the sensors are made of cadmium telluride.
9. The detector according to claim 1 , wherein the conductive grid is made of an FeNi29Co18 alloy.