Resolving soft X-ray absorption in energy, space and time in gaseous detectors using the VMM3a ASIC and the SRS

• DOI: 10.1016/j.nima.2020.164310
• Publication Date: 2020-07-03T15:45:58Z
• Authors: L. Scharenberg; F. Brunbauer; K. Desch; M. Hracek; M. Lisowska; M. Lupberger; H. Muller; E. Oliveri; D. Pfeiffer; L. Ropelewski; J. Samarati; M. van Stenis; A. Utrobicic; R. Veenhof
• Keywords: 03 medical and health sciences; 0302 clinical medicine

Abstract The implementation of the VMM3a Application-Specific Integrated Circuit (ASIC) into the Scalable Readout System (SRS) has opened a new domain for measurements with Micro-Pattern Gaseous Detectors (MPGDs). In the presented studies we demonstrate the capabilities of this system, specifically the time-resolution in the nanosecond regime in combination with a continuous multichannel readout and a 10-bit ADC. We can now resolve the interaction of argon fluorescence X-ray photons created in a gaseous detector and utilise these interactions to determine the electron drift velocity in our detector and to investigate the attenuation length of the fluorescence photons.