A crucial detector of the NA62 experiment is the beam spectrometer named Gigatracker. It consists of three stations of hybrid silicon pixels sensors with 150 ps (rms) of time resolution and 100 J.lm (rms) of space resolution. In addition the system operates under a high radiation environment and a high density of particles (up to 1.5 MHzlmm2 in the centre and 0.8 - I GHz in total). To meet these requirements the readout electronics must compensate the discriminators time-walk and the dead time should be below I %. In order to evaluate the best solution, two readout chips have been developed. One is based on the constant-fraction discriminator technique and the other one is based on the use of a timeover- Threshold circuit. The global architectures of both the front-end ASIC will be discussed. © 2010 by World Scientific Publishing Co. Pte. Ltd.
Readout electronics of the NA62 giga tracker system
Fiorini, M.;CarassitI, V.;Ramusino, A. Cotta;Chiozzi, S.;Petrucci, F.;
2010
Abstract
A crucial detector of the NA62 experiment is the beam spectrometer named Gigatracker. It consists of three stations of hybrid silicon pixels sensors with 150 ps (rms) of time resolution and 100 J.lm (rms) of space resolution. In addition the system operates under a high radiation environment and a high density of particles (up to 1.5 MHzlmm2 in the centre and 0.8 - I GHz in total). To meet these requirements the readout electronics must compensate the discriminators time-walk and the dead time should be below I %. In order to evaluate the best solution, two readout chips have been developed. One is based on the constant-fraction discriminator technique and the other one is based on the use of a timeover- Threshold circuit. The global architectures of both the front-end ASIC will be discussed. © 2010 by World Scientific Publishing Co. Pte. Ltd.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
