Measurement of the two-photon absorption cross-section of liquid argon with a time projection chamber

I Badhrees, A Ereditato, I Kreslo, M Messina, U Moser, B Rossi, M S Weber, M Zeller, C Altucci, S Amoruso, R Bruzzese, R Velotta
2010 New Journal of Physics  
This paper reports on laser-induced multiphoton ionization at 266 nm of liquid argon in a time projection chamber (LAr TPC) detector. The electron signal produced by the laser beam is a formidable tool for the calibration and monitoring of next-generation large-mass LAr TPCs. The detector that we designed and tested allowed us to measure the two-photon absorption cross-section of LAr with unprecedented accuracy and precision: sigma_ex=(1.24± 0.10stat ± 0.30syst) 10^-56 cm^4s-1.
doi:10.1088/1367-2630/12/11/113024 fatcat:j42357rn5jh2vi7vnms7h7d4lm