Feb 21 – 25, 2022
Vienna University of Technology
Europe/Vienna timezone

Silicon Detectors for Kaonic Atom X-Ray Measurements at DAFNE

Not scheduled
Vienna University of Technology

Vienna University of Technology

Gusshausstraße 27-29, 1040 Wien
Recorded Presentation Semiconductor Detectors


Marlene Tuechler


The SIDDHARTA-2 experiment at DA$\Phi$NE, aiming to precisely measure the $2p \rightarrow1s$ transition in kaonic deuterium atoms to study the low-energy regime of QCD, utilises two different kinds of novel silicon detectors. For the detection of the K$^-$d X-rays, newly developed arrays of Silicon Drift Detectors are used. The CUBE, a MOSFET based preamplifier, allows for a more stable operation and a lower temperature of the SDDs as compared to the JFET technology used for the K$^-$p measurement done by SIDDHARTA, leading to faster drift times ($< 1$ $\mu$s) and a lower energy resolution of $\sim 150$ eV at 6 keV.
In addition, the experiment uses Silicon Photomultipliers as part of the active veto system. A barrel of plastic scintillators closely behind the SDDs is read out by the SiPMs to suppress hadronic background. Additionally, this veto system is equipped with a system consisting of pulsed LEDs for the in-situ calibration of the SiPMs. Both detector systems and their characteristics are discussed in detail.

Primary experiment SIDDHARTA-2

Primary authors

Johann Zmeskal (Stefan Meyer Institute) Marlene Tuechler

Presentation materials