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Experimental set-up for alanine dosimetry in protons below 18 MeV.

Palmans, H; Dobrovodsky, J*; Durny, N*; Gouldstone, C; Kovác, P*; Martinkovic, J*; Mozolík, M*; Pavlovic, M*; Rosser, K*; Sharpe, P H G; Szöllos, O* (2007) Experimental set-up for alanine dosimetry in protons below 18 MeV. NPL Report. IR 3

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Abstract

An experimental set-up was created at the existing Biont 18 MeV proton beam line for measuring the response of alanine to protons in the energy region below 18 MeV. Extensive Monte Carlo simulations were performed in support of the design and characterisation of the beam line as well as for the interpretation of the experimental data. An experiment was performed comparing alanine, radiochromic film and a Markus ionization chamber. The experiments demonstrated that a stable beam of sufficiently low intensity for dosimetry could be produced. With the present set-up, accurate relative measurements using a stack of alanine pellets and accurate absolute calibration of one or more alanine pellets by directly placing them in front of a Markus chamber could be performed, provided the spectral characteristics and stability of the beam steering are improved. Based on the experience and Monte Carlo simulations, suggestions for such improvements are made.

Item Type: Report/Guide (NPL Report)
NPL Report No.: IR 3
Keywords: proton dosimetry, alanine, radiochromic film, beam line, Monte Carlo
Subjects: Ionising Radiation
Ionising Radiation > Dosimetry
Last Modified: 02 Feb 2018 13:15
URI: http://eprintspublications.npl.co.uk/id/eprint/4045

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