Speaker
Descrizione
In the last decades, Laser plasma acceleration (LPA) has seen a growing interest both for pure research purposes but also for being employed in applications. One of the key features is the possibility to reach high acceleration gradients, resulting in compact accelerators and reduced costs. Laser Wake-Field Acceleration (LWFA) is routinely used to produce energetic electrons and, by properly tuning the injection mechanism, high quality beams can be produced. At the Intense Laser Irradiation Laboratory (ILIL) a Titanium-Sapphire laser (6 J, 30 fs, 0.8 μm) is focused on a supersonic flow of Helium gas doped with Nitrogen at 1% so to trigger the production of Very High Energy Electron - VHEE (50-250 MeV) via the ionization injection mechanism granting high collimation and pointing stability. The latter can be further improved by means of magnetic beamline (MBL). We designed a modular and cost-effective MBL that thanks to its modularity can be adjusted to fit different purposes and beam energies.
The generated electrons are then let in air where they are characterized in terms of energy, dose and charge. To this purpose the diagnostic bench has been equipped with a magnetic spectrometer, an Integrating Current Transformer (ICT) and a set of radiochromic films holders both for studying the longitudinal dose deposition profile and have an estimate of the beam dose per each pulse. Once the electron beam has been fully characterized it can be used to irradiate biological samples.
