Development of a Device for the Transverse Profile Measurement of Hadron Beams

The clinical application of medical proton and ion accelerators requires more accurate and reliable devices for diagnostics of radiation parameters. For the radiotherapy procedures by high-energy beams of heavy charged particles, high-precision monitoring systems are needed to determine the intensity, position, and spatial distribution of the therapeutic beam in real time with minimum particle flux disturbance. Existing measuring systems do not meet all the necessary requirements. In this connection, it becomes relevant to develop a detecting device for recording the spatial and energy characteristics of proton and ion beams. In this work, the detecting device is developed to measure the transverse distribution of the intensity of hadron beams. The developed detector should allow the implementation of the multi-angle scanning method, which was proposed in our previous works and was successfully tested on X-ray and electron beams. As a result, a scheme of the developed detector has been proposed and the corresponding detecting device has been assembled. The device working medium is a thin scintillation fiber suitable for detecting high-energy hadron beams. The developed detector has been tested on proton and carbon ion beams. The horizontal profiles of the proton and ion beams for different energies measured using the developed and film detectors have been compared. As a result, it has been shown that the developed detector is suitable for measuring the transverse intensity distribution of high-energy proton and ion beams.

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