Experimental Particle and Astro-Particle Physics Seminar

Stefanos Leontsinis (University of Zurich (CH))

Abstract: During the Long Shutdown 4 of the LHC the instantaneous luminosity will be increased by a factor of $\approx 10$ up to $1.5 \times 10^{34}\text{cm}^{-2}\text{s}^{-1}$, the expected data recorded with the LHCb detector will increase from $50\,\text{fb}^{-1}$ to $300\,\text{fb}^{-1}$. This will require an upgrade of the LHCb Tracking systems. The innermost part of the downstream MightyTracker is planned to be instrumented with monolithic CMOS sensors. The outer part will keep the scintillating fibre approach of the current SciFi detector. There are several aspects that make this a unique tracking environment. The high occupancy in the high $\eta$ region of the LHCb (hit rates up to $18\,\text{MHz/cm}^2$), the harsh radiation conditions ($2\times 10^{15}\text{n}_\text{eq}/\text{cm}^2$), the streaming readout approach with the low material budget ($X/X_0<1.5\%>$) requirements are just naming a few key challenges. This can be achieved with newly developed  HV-CMOS sensors, which can provide a high timing resolution of $\approx 3$ ns and are sufficiently radiation hard. The planned total instrumented pixel area sums up to $18\,\mathrm{m}^2$ of pixelated silicon. There is the possibility to install a pilot detector in LS3. This talk will describe the plans for the MightyTracker and the studies with the MightyPix1 chip and it's precursors.