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Cirio, R.; Bonazzola, G.; Dogiorgis, G.; Marchetto, F.; Peroni, C.; Donetti, M.; Marietti, M.
CEA Grenoble, Lab. d'Electronique et de Technologie de l'Informatique, LETI, 38 (France)1999
CEA Grenoble, Lab. d'Electronique et de Technologie de l'Informatique, LETI, 38 (France)1999
AbstractAbstract
[en] This paper shows the results of irradiations with photons and neutrons of a Very Large Scale Integration (VLSI) CMOS AMS 0.8μm chip used in medical physics applications. It has been designed as readout of dosimeters and monitor chambers used on electron/photon and proton/carbon ions for tumor therapy. The chip is located close to the detectors and it is thus used in a radioactive environment. We have performed measurements on 30 MV X-rays, fast and thermal neutrons. The chip behaves well (i.e. the gain variations are below 1%) up to X- ray doses of 75 krad and a total fast neutron number of 4*1012. This allows the use of the chip over several years (>5) without performance modifications. It has to be noticed that in real life the dose rates are much lower than during the tests, allowing a self-repairing of the chip with annealing. No Single Event Effect was observed up to 1010 neutrons. (authors)
Original Title
Tenue aux radiations d'un VLSI CMOS 0.8 μm entrant dans l'instrumentation d'un accelerateur utilise pour la therapie des tumeurs
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Source
1999; [3 p.]; 5. European conference on radiation and its effects on components and systems; 5. congres europeen les radiations et leurs effets sur les composants et les systemes; Abbaye de Fontevraud (France); 13-17 Sep 1999; 5 refs.
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