Reproducing Boag and Wilson's ionisation curve

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SUMMARY

This discussion centers on the reproduction of the ionisation curve of an ionisation chamber as described by Boag and Wilson in their 1952 paper. The user attempted to plot the theoretical curve using parametric equations for f and xi derived from omega. While the shape of the curve appeared accurate, a significant discrepancy was noted in the x-axis midpoint, which was around 3 instead of the expected 0.1. The issue was ultimately resolved as a simple mistake on the user's part.

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  • Understanding of ionisation chambers and their operational principles
  • Familiarity with parametric equations and their applications in plotting
  • Knowledge of the theoretical framework presented in Boag and Wilson's 1952 paper
  • Basic skills in data visualization and graphing techniques
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  • Review Boag and Wilson's 1952 paper on ionisation curves for a deeper understanding of the theoretical framework
  • Explore parametric equations and their use in scientific graphing
  • Learn about common pitfalls in data plotting and how to troubleshoot discrepancies
  • Investigate advanced graphing tools and software for more accurate visual representations
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Researchers, physicists, and students involved in experimental physics, particularly those working with ionisation chambers and data visualization techniques.

vixo
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Hi, I'm trying to plot the the ionisation curve of an ionisation chamber against the theoretical curve outlined by Boag and Wilson in their paper -

http://ab-div-bdi-bl-blm.web.cern.c...turation_spacecharge/saturation_Boag_1952.pdf

I can't follow their derivation for the equation all the way (I know I should, but i don't have much time) but I have tried to reproduce their theoretical curve from the parametric equation for f and xi. I create f and xi from omega, then plot f against xi.

The shape of the curve looks pretty good, but it seems to be in a different place on the x-axis - in the paper the mid point is somewhere around 0.1, on my graph the mid point is somewhere around 3. i can't see a reason for the difference (am i missing something? is it obvious?) attached picture is of of the curve i plotted

help much appreciated
P
 

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false alarm. stupid mistake
 

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