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Extending the dynamic range of electronics in a Time Projection Chamber

Authors
Estee, J.Lynch, W. G.Barney, J.Cerizza, G.Jhang, G.Lee, J. W.Wang, R.Isobe, T.Kaneko, M.Kurata-Nishimura, M.Murakami, T.Shane, R.Tangwancharoen, S.Tsang, C. Y.Tsang, M. B.Hong, B.Lasko, P.Lukasik, J.McIntosh, A. B.Pawlowski, P.Pelczar, K.Sakurai, H.Santamaria, C.Suzuki, D.Yennello, S. J.Zhang, Y.
Issue Date
11-11월-2019
Publisher
ELSEVIER
Keywords
TPC; Heavy ion collisions; Dynamic range
Citation
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.944
Indexed
SCIE
SCOPUS
Journal Title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume
944
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/61907
DOI
10.1016/j.nima.2019.162509
ISSN
0168-9002
Abstract
When Time Projection Chambers (TPCs) are used in low to intermediate heavy ion collisions, the mass and momentum range of the emitted particles cover a wide range in energy losses. Many TPC readout electronics currently only have a single gain output with a fixed dynamic range. In a recent set of experiments using the SAMURAI Pion-Reconstruction and Ion-Tracker (S pi RIT) TPC, it was important to simultaneously measure relativistic pions and heavy ion tracks from the same collisions. As the ionization from a track's energy loss is collected and multiplied by the anode wires, a distribution of image charges is induced on the TPC read-out pads. If the avalanche on a wire is large enough, the charge collected by pads directly underneath will saturate the readout electronics; pads farther away in the distribution will not be saturated. Using these unsaturated pads and the known pad distribution function, we can estimate the charge on saturated pads, increasing the dynamic range by a factor of 5.
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