Time Projection Chambers with C-pads for heavy ion tracking

Authors :: Janik, R.
Prochazka, A.
Sitar, B.
Strmen, P.
Szarka, I.
Geissel, H.
Behr, K.-H.
Karagiannis, C.
Nociforo, C.
Weick, H.
Winkler, M.
Source :: Nuclear Instruments & Methods in Physics Research Section A. Jun2011, Vol. 640 Issue 1, p54-57. 4p.
Publication Year :: 2011
Abstract: Abstract: Time Projection Chambers with C-pads and integrated delay line readout were developed as position sensitive detectors for the Fragment separator at GSI Darmstadt. The main advantages of TPCs are a small amount of matter in the sensitive volume, high spatial resolution, and high tracking efficiency. Working parameters in experimental conditions are presented. Internal spatial resolutions of and were achieved. The tracking efficiency dependence on ion beam intensity was studied with 238U beam at 1 GeV/u energy. Efficiency of more than 99% was achieved up to 40kHz and over 90% for 250kHz 238U beam intensity. Different kinds of ions from proton to uranium were measured in many experiments and confirmed the result obtained. [Copyright &y& Elsevier]