Abstract
A method for controlling the synchrotron beam intensity during proton irradiation of patients is proposed. The control is based on the installation of two precision “warm-liquid” pad chambers, one at the exit from the last scanning magnet and the other in front of the patient. The intensity density of the beam directed to the irradiated target using two pad chambers is measured. The measured intensity density profiles are compared with specified parameters; the beam is turned off if the measured parameters deviate from the permissible ones. The result is an increase in the proton therapy conformity due to the continuous dose and dose field boundary control in the target for each accelerator pulse.
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