BARC/PUB/2013/0280

 
 

Comparison of graphite calorimeter dosimetry system with Monte Carlo simulation at an industrial electron beam accelerator

 
     
 
Author(s)

Benny, P. G.; Selvam, T. P.; Sarma, K. S. S.
(RTDD;RP&AD)

Source

Nuclear Instruments & Methods in Physics Research-A, 2013. Vol. 703: pp. 98-101

ABSTRACT

In apreviously published study, were ported the estimation of various dosimetry parameters such as Average absorbed dose, energy fluence and practical range for an electron beam of 1.6MeV using Graphite calorimeters of different  thicknesses. In this study, depth dose distribution in a graphite block was measured using cellulose triacetate (CTA) dosimeter strip for the scanned electron beam of kinetic energy 1.6MeV and compared against the EGSnrc-based Monte Carlo calculations. Monte Carlo calculations agree to the measurements for depths beyond about 0.15cm. Similarly absorbed dose measurements were carried out in graphite discs of different thicknesses and compared against the Monte Carlo calculations. The comparison is good for thicknesses of discs 0.4cm and above.  Although, the disagreement between measurements and calculations does not affect over all conclusion of the study, disagreement is attributed possibly due to presence of low energy spectrum of electrons in the measurements in addition to the prominent 1.6 MeV electrons. Both calculations and measurements demonstrate that energy absorption is linear upto 0.3cm thick graphite.

 
 
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