Improving the performance of the liquid argon TPC by doping with tetra-methyl-germanium

In order to recover the charge lost by electron-ion recombination, we doped pure liquid argon with a photosensitive hydrocarbon, tetra-methyl-germanium (TMG), in the 3 ton ICARUS TPC. A charge increase of 25% to 220% was observed for different electric fields and for energy densities ranging from 1....

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Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 1995-02, Vol.355 (2), p.660-662
Main Authors: Cennini, P., Revol, J.P., Rubbia, C., Tian, W.H., Dzialo Giudice, D., Li, X., Motto, S., Picchi, P., Boccaccio, P., Cavanna, F., Piano Mortari, G., Verdecchia, M., Cline, D., Otwinowski, S., Wang, H.G., Zhou, M., Bettini, A., Casagrande, F., Centro, S., de Vecchi, C., Pepato, A., Pietropaolo, F., Ventura, S., Benetti, P., Calligarich, E., Dolfini, R., Gigli Berzolari, A., Mauri, F., Mazzone, L., Montanari, C., Negrini, M., Piazzoli, A., Rappoldi, A., Raselli, G.L., Scannicchio, D., Vignoli, C., Periale, L., Suzuki, S.
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Language:English
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Summary:In order to recover the charge lost by electron-ion recombination, we doped pure liquid argon with a photosensitive hydrocarbon, tetra-methyl-germanium (TMG), in the 3 ton ICARUS TPC. A charge increase of 25% to 220% was observed for different electric fields and for energy densities ranging from 1.6 to 32 MeV/cm.
ISSN:0168-9002
1872-9576
DOI:10.1016/0168-9002(94)01405-1