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In this work, we have used CR-39 detectors to estimate the LET (linear energy transfer) spectrum of secondary particles due to 171 MeV proton beam at different depths of water including the Bragg peak region. The measured LET spectra were compared with those obtained from FLUKA Monte Carlo simulation. The absorbed dose ( D LET ), dose equivalent ( H LET ) were estimated using the LET spectra. The values of D LET and H LET per incident proton fluence were found to increase with the increase in depth of water and were maximum at Bragg peak. [ABSTRACT FROM AUTHOR]

Abstract: A new algorithm for the tracking of charged particles through timing detectors is proposed, providing as output the coordinates, slopes, velocity and an offset time at a given reference plane. The algorithm is based on a least squares method and works directly with first level data provided by the detectors, either coordinates or readout times. Some general analytical solutions valid for different detector layouts are given. Advantages compared to traditional straight track fitting algorithms are discussed. [ABSTRACT FROM AUTHOR]