TREDI2020: 15th "Trento" Workshop on Advanced Silicon Radiation Detectors

Silicon Sensors for Extreme Fluences

18 Feb 2020, 18:00

20m

TU the Sky (TU Wien)

contributed talk hybrid sensors (3D, LGAD) Radiation and High Fluence

Speaker

Valentina Sola (Universita e INFN Torino (IT))

Description

Present silicon sensor technology allows to efficiently operate sensors up to 10${}^{16}$ n${}_{eq}$/cm${}^2$. However, several future applications, such as tracking detectors in high-luminosity and high-energy particle physics experiments, monitors for particle therapy and nuclear fusion reactors, envisage the use of silicon sensors in environments with fluences exceeding 10${}^{17}$ n${}_{eq}$/cm${}^2$.

To overcome the present limit, we propose a design of silicon sensors which extends the range of operation by more than one order of magnitude, up to fluences of 5$\cdot$10${}^{17}$ n${}_{eq}$/cm${}^2$. The idea behind this radiation tolerance exploits the saturation of radiation damage effects, observed above 5$\cdot$10${}^{15}$ n${}_{eq}$/cm${}^2$, in combination with two developments in sensor technology: (i) the use of thin sensors (20-30 $\mu$m), intrinsically less affected by radiation than thicker sensors, and (ii) the presence of internal signal multiplication (gain of 5-10), to compensate for the low signals generated in thin active volumes.

Presentation materials

vs_TREDI_2020.pdf