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oe1(光电查) - 科学论文

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  • Irradiation and dosimetry arrangement for a radiobiological experiment employing laser-accelerated protons

    摘要： The Bragg Peak is a unique characteristic of ion beams which makes their use beneficial in cancer treatment as it allows the majority of dose deposition to be localised in a precise volume. The use of a laser system for particle acceleration is currently investigated as a potential alternative to the conventional RF accelerators currently used for hadrontherapy. The biological response of cells irradiated by high dose-rate laser-driven ions is currently being explored in this context. The experiment reported here was carried out as part of the A-SAIL project, a UK-wide collaboration aiming to develop innovative techniques for accelerating ions for future clinical applications. In this contest, a radiobiological experiment was carried out on the pico2000 laser beamline at LULI-école Polytechnique using an energetically spread, laser-accelerated proton beam. This paper will discuss the arrangement used in the experiment, and the techniques employed for an accurate estimation of the dose deposited, supported by Monte Carlo simulations of the particle propagation through the irradiation system.

    关键词： Ion sources,Lasers,Radiation damage evaluation methods

    更新于2025-09-12 10:27:22

  • Radiation damage effects caused by soft X-rays in silicon pad detectors

    摘要： We present the results of a systematic investigation of X-ray induced radiation damage in silicon pad sensors for total ionising doses up to 320 Gy (SiO2). The radiation induced degradation of energy spectra as well as of critical sensor parameters, capacitance and leakage current, have been measured vs total dose. Detailed analysis of the measured energy resolution shows that degradation of energy resolution can be explained by degradation of the sensor parameters. Additional radiation e?ects related to charge division have been observed.

    关键词： Si microstrip and pad detectors,X-ray detectors,Radiation damage evaluation methods

    更新于2025-09-09 09:28:46