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description: GSI Helmholtzzentrum für Schwerionenforschung
items: Test Results Of Chamber L2C0#3
items: Re: Test Results Of Chamber L2C0#3

Test Results Of Chamber L2C0#3
type: item
description: Dear All As an example, the results of testing chamber l2C0#3 are shown below (leakrate, gain curve, gain uniformity) 1.Leakrate ========== The oxygen content within the chamber is measured in intervals of 5 minutes. The asymptotic value is an indicator of the leakrate. The flow rate was set at 10 l/h which leads to a time constant of ~4h Fit : f(x)=a+b*exp(-c*x) 2.Gain Curve ============ The anode voltage is increased in steps of 20 V starting at 1000 V up to 1600 V. At each step the anode current is recorded. Fit : f(x)=a+b*exp(c*x) 3.Gain Uniformity ================= There are two different measurement modes: 1. 1D scans with 4mm steps .Here you can clearly see the radiator bars, which absorb very strongly 1.1 4mm steps scan in z-direction at two different phi positions 1.2 4mm steps scan in phi-direction at two different z positions 2. A full 2D scan with 4cm equidistant steps. Here one can only see the radiator bar in the middle very clearly, due to the bigger step size.
creator: Sascha Freuen
date: 2004-09-30T13:33:11-00:00

Re: Test Results Of Chamber L2C0#3
type: item
description: Dear Sascha, very impressive pictures indeed. Just on question: in all cases the X-ray tube was used for irradiation? Regards, Harry
creator: Harald Appelshaeuser
date: 2004-10-12T08:00:51-00:00

Re: Test Results Of Chamber L2C0#3
type: item
description: Dear Harry For the gain curve measurement the Sr90 source was used. Regards Sascha
creator: Sascha Freuen
date: 2004-10-12T17:32:26-00:00