Author/Authors :
Janik، نويسنده , , R. and Prochazka، نويسنده , , A. and Sitar، نويسنده , , B. and Strmen، نويسنده , , P. and Szarka، نويسنده , , I. and Geissel، نويسنده , , H. and Behr، نويسنده , , K.-H. and Karagiannis، نويسنده , , C. and Nociforo، نويسنده , , C. Wagner Weick، نويسنده , , Paul H. and Winkler، نويسنده , , M.، نويسنده ,
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 σ x = 88 μ m and σ y = 38 μ m 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 40 kHz and over 90% for 250 kHz 238U beam intensity. Different kinds of ions from proton to uranium were measured in many experiments and confirmed the result obtained.
Keywords :
Time projection chamber , Ion tracking , delay line , Cathode readout
