Development of the simultaneous spectrometer for laser-accelerated ions and electrons

In recent decades, laser-driven ion acceleration experiments have been carried out in the intense laser facilities. Laser-driven ion acceleration experiments using hydrogen cluster targets have been succeeded in accelerating more than 20 MeV protons, and it has a potential to develop energy saving compact particle accelerators. The energy spectrum must be measured in shot-by-shot of intense laser to reveal the stability of laser-accelerated protons. In the present study, it has been developed that the real-time energy spectrometer which can measure laser-accelerated protons and electrons in coaxial direction. The developed spectrometer consists separate magnetic and electric field parts. The magnetic field separate the direction of ions and electrons, then the electrons were entered into phosphor screen. The deflected ions which after passing the magnetic field pass through the electric field such as Thomson parabola spectrometer, then the ions were entered into micro channel plate with phosphor screen. Therefore, the developed spectrometer can measure shot-by-shot energy spectrum of laser-accelerated ions and electrons, and it can contribute to reveal the acceleration mechanism. In the presentation, we will show the detail of the developed spectrometer and some experimental results.ICMaSS202