Difference between revisions of "Diamond strip electron detector"
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== Introduction == | == Introduction == | ||
| − | The electron detector in use is a 21mm x 21mm CVD diamond microstrip. We are using 4 planes of the above detector for | + | The electron detector in use is a 21mm x 21mm CVD diamond microstrip. We are using 4 planes of the above detector for coincidence measurement. Each of the 4 planes are separated by ~ 1cm with the strips of each plane aligned to ~ 20 µm. Each plane contains 96 horizontal diamond strips (polycrystalline CVD diamond). Each strip is 180 µm wide and they are separated by a 20 µm gap. Metalization was done on each plane with Titanium-Platinum-Gold (TiPtAu). The carrier boards are in Ceramic (alumina). |
[[Image:El det diamond.png|700px]] | [[Image:El det diamond.png|700px]] | ||
| − | + | The way we had to connect the flex cables to the QWAD boards, we lose the first 4 strips of the detector to the QWAD and Flex grounds. Hence the strip # 5 reaches that QWAD pin which should have received strip # 1, hence the Data acquisition treats the 5th strip as strip # 1. In order to avoid confusion and repetative explanation, in all plots generated, we just treat as if the detector has strips starting from position of 5th strip and the position of the compton-edge as spotted in the spectrum is appropriately corrected. | |
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== Technical Diagram == | == Technical Diagram == | ||
Revision as of 16:33, 31 October 2011
Introduction
The electron detector in use is a 21mm x 21mm CVD diamond microstrip. We are using 4 planes of the above detector for coincidence measurement. Each of the 4 planes are separated by ~ 1cm with the strips of each plane aligned to ~ 20 µm. Each plane contains 96 horizontal diamond strips (polycrystalline CVD diamond). Each strip is 180 µm wide and they are separated by a 20 µm gap. Metalization was done on each plane with Titanium-Platinum-Gold (TiPtAu). The carrier boards are in Ceramic (alumina).
The way we had to connect the flex cables to the QWAD boards, we lose the first 4 strips of the detector to the QWAD and Flex grounds. Hence the strip # 5 reaches that QWAD pin which should have received strip # 1, hence the Data acquisition treats the 5th strip as strip # 1. In order to avoid confusion and repetative explanation, in all plots generated, we just treat as if the detector has strips starting from position of 5th strip and the position of the compton-edge as spotted in the spectrum is appropriately corrected.
Technical Diagram
Following is the desgin layout of the given detector:
