In this paper we present results from a test of a small Liquid Argon Large Electron Multiplier Time Projection Chamber (LAr LEM-TPC). This detector concept provides a 3D-tracking and calorimetric device capable of charge amplification, suited for next-generation neutrino detectors and possibly direct Dark Matter searches. During a test of a 3~lt chamber equipped with a 10×10~cm2 readout, cosmic muon data was recorded during three weeks of data taking. A maximum gain of 6.5 was achieved and the liquid argon was kept pure enough to ensure 20~cm drift (O(ppb)~O2 equivalent).
@article{arxiv.1010.2482,
title = {Stable operation with gain of a double phase Liquid Argon LEM-TPC with a 1 mm thick segmented LEM},
author = {A. Badertscher and A. Curioni and S. Horikawa and L. Knecht and D. Lussi and A. Marchionni and G. Natterer and F. Resnati and A. Rubbia and T. Viant},
journal= {arXiv preprint arXiv:1010.2482},
year = {2011}
}
Comments
7 pages, 6 figures, to appear in Proc. of 1st International Workshop towards the Giant Liquid Argon Charge Imaging Experiment (GLA2010), Tsukuba (Japan), March 2010