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AbstractAbstract
[en] In the detection of heavy ions and fission fragments, the photovoltaic cells can take the place of traditional silicon surface barrier detectors, if we need a great number of detectors as in the case of 4π multidetector, and do not expect excellent energy and time resolutions at the same time. Made for the purpose of converting the solar energy to the electrical energy, the photovoltaic cells have the similar structure as silicon surface barrier detectors, except for their much thinner pn junctions and, as a result much larger junction capacities, which is a major disadvantage for photovoltaic cells as fission fragment detectors. In order to get an acceptable energy resolution and a time resolution as good as possible, it is necessary to design a preamplifier specially adapted to cells, which plays a very important role in the utilization of photovoltaic cells as detectors. In the present work we analyze the electrical signal from a cell when hit by a fission fragment, and propose a new type cell oriented preamplifier of voltage, with which we can use a cell up to 10 cm2, and obtain a time resolution better than 16 ns
[fr]
Concues pour la conversion de l'energie solaire en energie electrique, les cellules photovoltaiques ont une structure similaire a celle des detecteurs silicium a barriere de surface. Elles peuvent etre utilisees pour la detection des ions lourds de grande energie. Pour obtenir des resolutions en energie et en temps les meilleures possibles, il est necessaire de concevoir un preamplificateur specialement adapte aux caracteristiques electriques de ces cellules dont la capacite parasite est d'environ 30 nF/cm2. Avec le preamplificateur que nous avons etudie, nous pouvons utiliser, comme detecteurs de fragments de fission, des cellules photovoltaiques jusqu'a 10 cm2 et obtenir une resolution en temps meilleure que 16 nsOriginal Title
Utilisation de cellules photovoltaiques comme detecteurs de fragments de fission et etude d'un preamplificateur adapte a ces cellules
Source
Apr 1989; 131 p; These (D. es Sci.).
Record Type
Report
Literature Type
Thesis/Dissertation
Report Number
Country of publication
ACCELERATORS, AMPLIFICATION, AMPLIFIERS, CYCLIC ACCELERATORS, CYCLOTRONS, DETECTION, DIRECT ENERGY CONVERTERS, ELECTRONIC EQUIPMENT, EQUIPMENT, ISOCHRONOUS CYCLOTRONS, ISOTOPES, MATERIALS, NUCLEAR REACTION YIELD, PHOTOELECTRIC CELLS, RADIATION DETECTION, RADIOACTIVE MATERIALS, RESOLUTION, TIMING PROPERTIES
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