MCz1e13CCMResults

Introduction

Results from correcting the waveforms taken with the RD50 TCT measurement setup under the supervision of Christian Gallrapp. Plots made with CCM correction.

It was found that:
NO trapping time was the best fit for this data.

Corrected Waveforms

Error: (3) can't find fit_-300_20.png in Sandbox
Error: (3) can't find CCM_20_fitted.png in Sandbox

Function arguments and parameters

Body

Imported parameters

Error: (3) can't find twikiPlot_modifiedWaveform.png in Sandbox

NB To compare the uncorrected waveform with the corrected waveforms in this analysis, set one of the candidate trapping times to 0. In reality a trapping time of zero would mean that all charges in the sample were trapped and no signal produced - this is very unfeasible for the fluences in this irradiation study! A trapping time of infinity is equivalent to none of the charges being trapped in the sample - or how the signal would look if tct measurements were performed on an unirradiated sample. Since infinity is a difficult concept to feed into the program, Tau=0, an unphysical concept is used instead.

Integration and limits

This waveform is then integrated to obtain the charge collected by the sensor, so the next part of the code calls one of two functions to establish limits for this integration. As the waveform is being corrected by a time-dependent exponentiated function, it is not reasonable to deduce the integration limits from it. Instead one of three methods are used:

  • findEdges_inflectionPoints - use the rising and falling edge of the unmodified signal to set the integration limits.
  • findEdges_ToT - set a marker from when the unmodified signal goes over a threshold (nominally double the noise amplitude) and a marker when next it dips below the threshold. These markers bound the time the signal is over the threshold set (Time Over Threshold).
  • Set the limits manually - mostly for debugging purposes if the two automatic methods above fail.
The limits functions set the limits in the dataContainer object so they can easily be passed to the integration function.

Error: (3) can't find twikiPlot_waveform_w_limits.png in Sandbox

Error: (3) can't find fit_-300_20.png in Sandbox
Error: (3) can't find CCM_20_fitted.png in Sandbox


Major updates:
-- RebeccaCarney - 16-July-2014

%RESPONSIBLE% RebeccaCarney

%REVIEW% Never reviewed

Topic attachments
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PNGpng waveformComparison_-60.png r1 manage 120.9 K 2014-07-25 - 13:45 RebeccaCarney Waveforms
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PNGpng waveformComparison_0.png r1 manage 120.2 K 2014-07-25 - 13:44 RebeccaCarney waveforms
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Topic revision: r2 - 2014-07-25 - RebeccaCarney
 
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