Studies with cathode drift chambers for the GlueX experiment at Jefferson Lab

Pentchev, L.; Barbosa, F.; Berdnikov, V.; Butler, D.; Furletov, S.; Robison, L.; Zihlmann, B.

doi:10.1016/j.nima.2016.04.076

Studies with cathode drift chambers for the GlueX experiment at Jefferson Lab

Feb 11, 2017

4 pages

Part of Proceedings, 14th Vienna Conference on Instrumentation (VCI 2016) : Vienna, Austria, February 15-19, 2016, 281-284

Published in:

Nucl.Instrum.Meth.A 845 (2017) 281-284

Contribution to:

- VCI 2016
, 281-284

Published: Feb 11, 2017

DOI:

10.1016/j.nima.2016.04.076

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Abstract: (Elsevier)

A drift chamber system consisting of 24 1 m-diameter chambers with both cathode and wire readout (total of 12,672 channels) is operational in Hall D at Jefferson Lab (Virginia). Two cathode strip planes and one wire plane in each chamber register the same avalanche allowing the study of avalanche development, charge induction process, and strip resolution. We demonstrate a method for reconstructing the two-dimensional distribution of the avalanche “center-of-gravity” position around the wire from an 55 Fe source with resolutions down to 30 μm. We estimate the azimuthal extent of the avalanche around the wire as a function of the total charge for an Ar/CO 2 gas mixture. By means of cluster counting using a modified 3 cm-gap chamber, we observe significant space charge effects within the same track, resulting in an extent of the avalanche along the wire.