Speaker
Description
TinyTPC is a compact Liquid Argon Time Projection Chamber (LArTPC) with a pixelated LArPix readout, used for R&D on improving energy reconstruction for low-energy events through enhanced ionization charge creation. We investigate the use of isobutylene, a photosensitive dopant with an ionization energy well-matched to argon scintillation light. Since scintillation light in LArTPCs is typically collected with much lower efficiency (<1%) than ionization charge (~100%), converting scintillation photons into additional ionization could increase the total detectable signal and improve energy resolution. In our first doping run, we introduced isobutylene at the 4 ppm level and observed a 5% increase in total collected charge compared to pure argon. I will present our experimental setup, data analysis methods, and results from this initial test.
