  In this work, the standard CsI(Tl) scintillator was used to determine the
characteristics of a proton beam. By irradiating the scintillator with a proton
beam, it was able to subsequently measure the emitted light using a
spectrometer. This work presents the dose response of a scintillator and its
use to measure the depth-dose profile of a proton beam. The measurement of the
dose response showed that the emission light of the scintillator depended on
the total dose of the proton beam. For the design of the depth-dose
measurement, the setup of the water phantom included a scintillator and a water
tank. The depth-dose profile was determined through varying the water depth at
various positions along the path of the proton beam until the end of the Bragg
peak region. To compare the measured depth-dose profile, the deposited energy
was simulated and fitted Birks constant for collecting quenching. Furthermore,
the recommended measurement design suggested using a thin scintillator, as it
resulted in a narrower shape of the depth-dose profile. Based on experiment and
simulation data, a standard CsI(Tl) scintillator was promising for determining
the characteristic proton beam.
