Speaker
Description
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 |
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