Abstract
ELI (Extreme Light Infrastructure) multidisciplinary applications of laser-ion acceleration (ELIMAIA) is one the user facilities beamlines of the ELI-Beamlines facility in Prague. It will be dedicated to the transport of laser-driven ion beams and equipped with detectors for diagnostics and dosimetry, in order to carry out experiments for a broad range of multidisciplinary applications. One of the aims of the beamline is also to demonstrate the feasibility of these peculiar beams for possible medical applications, which means delivering controllable and stable beams, properly monitoring their transport parameters and accurately measuring the dose per shot. To fulfil this task, innovative systems of charged particle beam diagnostics have been realized and alternative approaches for relative and absolute dosimetry have been proposed. Concerning the first one, real-time diagnostic solutions have been adopted, involving the use of time-of-flight techniques and Thomson parabola spectrometry for an on-line characterization of the ion beam parameters, as well as radiochromic films, nuclear track detectors (typically CR39), and image plates for single shot measurements. For beam dosimetry, real-time beam/dose monitoring detectors have been realized, like the secondary emission monitor and a double-gap ionization chamber, which can be cross calibrated against a Faraday cup, used for absolute dosimetry. The main features of these detectors are reported in this work together with a description of their working principle and some preliminary tests.
Highlights
Ion acceleration driven by high-intensity laser pulses is attracting an impressive and steadily increasing research effort
Real-time diagnostics based on Thomson parabola spectrometers (TPS) and detectors working in time-of-flight (TOF) providing an on line characterization of the ion beam features; diagnostics operating in single shot mode using well-established detectors as radiochromic films (RCF), nuclear track detectors, image plates (IP), and other types of dosimeters
As a user multidisciplinary beam line aiming to explore the use of controllable and stable laser-drive proton/ion beams for applications, included the medical ones, the ELIMAIA beam line will be equipped of all the detectors required to perform accurate dosimetry and will provide all the tools to let the users carry out the proposed experiments
Summary
Ion acceleration driven by high-intensity laser pulses is attracting an impressive and steadily increasing research effort. Ion beams accelerated by high-intensity lasers are very promising because they are produced in an extremely compact “plasma accelerator” in comparison with conventional accelerators, having huge potential in terms of overall cost of a laser-based accelerator facility Such particle beams are, typically, accelerated over micrometer range distances and have no limitation in terms of ion species, different to conventional accelerators. Its main goal is to deliver laser driven proton/ion beams both for basic laser-plasma acceleration physics and for multidisciplinary user applications, especially in the field of hadron-therapy or biomedical research [10]. A real-time diagnosis coupled with new devices for accurate dose measurements of the measurements of the laser-accelerated ions is crucial to monitor and to tune the ion source to deliver laser-accelerated ions to monitor and tune the ion source for to deliver the required doseand to the required dose to is thecrucial user samples.
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