| Paper |
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| MOPC084 |
A Laser-driven Acceleration Method
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253 |
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- L. Torrisi, S. Gammino, D. Margarone
INFN/LNS, Catania
- A. Borrielli, F. Caridi
INFN & Messina University, S. Agata, Messina
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A laser ion source (LIS) has been obtained with a repetitive pulsed laser at power density of the order of 1010 W/cm2 or higher, with pulse duration of the order of ns and repetition rate of the order of tens Hz. Any solid target can be ablated producing plasma with equivalent temperatures higher than 100 eV, densities higher than 1017/cm3 and charge states higher than 10+. Extracted current densities can be higher than 10 mA/cm2. The study of the electric fields generated inside the non equilibrium plasmas is a by-product of the research in ion generation. Ions are emitted from the plasma in the direction of the electric field with energies of the order of 50 eV/nucleon or higher, depending on the laser intensity. Emitted ions have a Boltzmann ion energy distribution depending on the ion charge state. Previous papers show that the electric field is as high as 10 MV/cm in our case. Magnetic trapping of electrons has been used to increase the ion acceleration, focusing and current. This new ion acceleration method based on LIS seems to be very interesting because it may permit to build accelerators with small dimensions and relatively low cost.
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