We describe a UV photodetector with single photon (electron) counting and imaging capability. It is based on a CsI photocathode, a GEM charge multiplier and a self-triggering CMOS analog pixel chip with 105 k pixels at 50 pm pitch. The single photoelectron produced by the absorption of a UV photon is drifted to and multiplied inside a single GEM hole. The coordinates of the GEM avalanche are reconstructed with high accuracy (4 mu m rms) by the pixel chip. As a result the map of the GEM holes, arranged on a triangular pattern at 50 pm pitch, is finely imaged. (C) 2007 Published by Elsevier B.V.
Imaging with the invisible light
BALDINI, LUCA;MASSAI, MARCO MARIA;RAZZANO, MASSIMILIANO;
2007-01-01
Abstract
We describe a UV photodetector with single photon (electron) counting and imaging capability. It is based on a CsI photocathode, a GEM charge multiplier and a self-triggering CMOS analog pixel chip with 105 k pixels at 50 pm pitch. The single photoelectron produced by the absorption of a UV photon is drifted to and multiplied inside a single GEM hole. The coordinates of the GEM avalanche are reconstructed with high accuracy (4 mu m rms) by the pixel chip. As a result the map of the GEM holes, arranged on a triangular pattern at 50 pm pitch, is finely imaged. (C) 2007 Published by Elsevier B.V.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
