Trimethyl Bismuth Optical Properties for Particle Detection and the CaLIPSO Detector

Trimethyl bismuth (TMBi) is a “heavy” transparent and dielectric organometallic liquid. This paper focuses on the measurement of TMBi’s optical properties relevant for particle detection. We measured the TMBi transmission curve and refraction index versus wavelength, as well as the light production yield and the timing performance on a small size cell.