Cleopatra: a 12-channel recycling integrator ASIC for the readout of hydrogenated amorphous silicon detectors in radiotherapy dosimetry

Mazza, G.; Wheadon, R.; Lenta, F.; Buti, C.; Fabi, M.; Grimani, C.; Pallotta, S.; Sabbatini, F.; Talamonti, C.; Villani, M.; Aziz, S.; Calcagnile, L.; Caricato, A. P.; Martino, M.; Maruccio, G.; Monteduro, A. G.; Quarta, G.; Rizzato, S.; Catalano, R.; Cirrone, G. A. P.; Cuttone, G.; Guarrera, M. C.; Petringa, G.; Frontini, L.; Liberali, V.; Stabile, A.; Vasquez, M.; Croci, T.; Ionica, M.; Kanxheri, K.; Menichelli, M.; Morozzi, A.; Moscatelli, F.; Passeri, D.; Pedio, M.; Peverini, F.; Placidi, P.; Servoli, L.; Tosti, L.; Zema, N.; Caputo, D.; De Cesare, G.; Lovecchio, N.; Nascetti, A.; Calvo, D.; Cirio, R.; De Remigis, P.; Dunand, S.; Thomet, J. E.; Large, M.; Petasecca, M.; Bashiri, A.; Piccolo, L.; Wyrsch, N.

doi:10.1088/1748-0221/20/01/C01034

The Cleopatra ASIC is a 12-channel prototype ASIC for the readout of hydrogenated amorphous silicon sensors used for real-time dosimetry in radiation diagnostic and radiation therapy. The architecture is based on a current to frequency conversion based on the recycling integrator principle in order to cover a dynamic range of four orders of magnitude with high linearity. Three different input amplifier configurations have been implemented in order to check the trade-off between detector capacitance and maximum output frequency. Cleopatra has been designed in CMOS 28 nm technology and succesfully tested in laboratory.

Cleopatra: a 12-channel recycling integrator ASIC for the readout of hydrogenated amorphous silicon detectors in radiotherapy dosimetry / Mazza, G., Wheadon, R., Lenta, F., Buti, C., Fabi, M., Grimani, C., Pallotta, S., Sabbatini, F., Talamonti, C., Villani, M., Aziz, S., Calcagnile, L., Caricato, A.P., Martino, M., Maruccio, G., Monteduro, A.G., Quarta, G., Rizzato, S., Catalano, R., Cirrone, G.A.P., et al.. - In: JOURNAL OF INSTRUMENTATION. - ISSN 1748-0221. - 20:1(2025). [10.1088/1748-0221/20/01/C01034]