This paper describes the design, realization and operation of a prototype liquid Argon Time Projection Chamber (LAr TPC) detector dedicated to the development of a novel online monitoring and calibration system exploiting UV laser beams. In particular, the system is intended to measure the lifetime of the primary ionization in LAr, in turn related to the LAr purity level. This technique could be exploited by present and next generation large mass LAr TPCs for which monitoring of the performance and calibration plays an important role. Results from the first measurements are presented together with some considerations and outlook.
@article{arxiv.0906.3437,
title = {A prototype liquid Argon Time Projection Chamber for the study of UV laser multi-photonic ionization},
author = {B. Rossi and I. Badhress and A. Ereditato and S. Haug and R. Hanni and M. Hess and S. Janos and F. Juget and I. Kreslo and S. Lehmann and P. Lutz and R. Mathieu and M. Messina and U. Moser and F. Nydegger and H. U. Schutz and M. S. Weber and M. Zeller},
journal= {arXiv preprint arXiv:0906.3437},
year = {2009}
}