{"id":2294,"date":"2023-06-25T11:59:14","date_gmt":"2023-06-25T09:59:14","guid":{"rendered":"http:\/\/s848664668.onlinehome.fr\/Wordpress\/?p=2294"},"modified":"2023-06-28T15:30:30","modified_gmt":"2023-06-28T13:30:30","slug":"detecteur-de-photons-avec-photomultiplicateur-hamamatsu-h7155","status":"publish","type":"post","link":"https:\/\/www.swissrocketman.fr\/Wordpress\/?p=2294","title":{"rendered":"Detecteur de photons avec photomultiplicateur Hamamatsu H7155"},"content":{"rendered":"

Tests avec un photomultiplicateur\u00a0 HAMAMATSU\u00a0 \u00a0H7155 .<\/p>\n

R\u00e9alis\u00e9 un attenuateur permettant de mesurer des pulses lasers et des LED’s. Pour cela je monte une fibre monomode sur l’entr\u00e9e du photomultiplicateur et un rail muni d’un chariot comprenant une lentille biconcave. Pour changer le signal en intensit\u00e9 il suffit de d\u00e9placer la lentille par rapport a l’entr\u00e9e de la fibre<\/h4>\n<\/div><\/section><\/div>\n
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La s\u00e9rie H7155 sont des t\u00eates de comptage de photons compactes compos\u00e9es d’un
\ntube photomultiplicateur \u00e0 bo\u00eetier m\u00e9tallique avec un compteur de photons \u00e0 grande vitesse et un circuit d’alimentation haute tension. L’alimentation haute tension pour le tube photomultiplicateur et le niveau du discriminateur sont pr\u00e9r\u00e9gl\u00e9s \u00e0 des valeurs optimales,
\npermettant la mesure de comptage de photons en connectant simplement une alimentation + 5 V.
\nLe H7155-20 dispose d’un prescaler interne de division par 4. Ce prescaler am\u00e9liore la lin\u00e9arit\u00e9 de comptage par 4 par rapport au H7155.<\/h5>\n<\/div><\/section><\/div><\/p>\n
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