A new cylindrical drift chamber is currently under construction for the MEG II experiment. The chamber is meant to track low momentum positrons from μ+ decays to search for μ+→e+γ events. The detector is segmented in very small drift cells, placed in stereo configuration and operated in a helium-isobutane gas mixture. The use of thin aluminium wires and light gas mixture set the total radiation length of the chamber to only 1.6×10-3X0 per track turn allowing for a momentum resolution of ∼120 keV/c.
Baldini A.M., Baracchini E., Berretta L., Bianucci S., Cavoto G., Chiarello G., et al. (2016). A new cylindrical drift chamber for the MEG II experiment. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 824, 589-591 [10.1016/j.nima.2015.10.103].
A new cylindrical drift chamber for the MEG II experiment
Chiarello G.;
2016-01-01
Abstract
A new cylindrical drift chamber is currently under construction for the MEG II experiment. The chamber is meant to track low momentum positrons from μ+ decays to search for μ+→e+γ events. The detector is segmented in very small drift cells, placed in stereo configuration and operated in a helium-isobutane gas mixture. The use of thin aluminium wires and light gas mixture set the total radiation length of the chamber to only 1.6×10-3X0 per track turn allowing for a momentum resolution of ∼120 keV/c.
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