Speaker
Mathieu Perrin-Terrin
(CERN)
Description
The Gigatracker is an hybrid silicon pixel detector built for the NA62 experiment aiming at measuring the branching fraction of the ultra-rare kaon decay $K^+ \to \pi^+ \nu \bar{\nu}$ at the CERN SPS. The detector has to track particles in a beam with a flux reaching 1.3 MHz/mm$^2$ and provide single-hit timing with 200 ps RMS resolution for a total material budget of less than 0.5% $X_0$ per station. The tracker comprises three 63.1 mm $\times$ 29.3 mm stations installed in $10^{-6}$mbar vacuum and cooled with liquid C6F14 circulating through microchannels etched inside 130 um thick silicon plates. Each station is composed of a 200 um thick silicon sensor readout by 2$\times$5 custom 100 um thick ASIC, called TDCPix. Each chip contains 40$\times$45 asynchronous pixels, each 300 um $\times$ 300 um, and is instrumented with 100 ps bin time-to-digital converters. In order to cope with the high rate, the TDCPix is self-triggered and data are sent out through four 3.2 Gb/s serialisers. We will describe the detector and the results from the 2014 NA62 run.
Author
Mathieu Perrin-Terrin
(CERN)
