Emittance measurement along transport beam line for laser driven protons
Open Access
- 11 March 2020
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Accelerators and Beams
- Vol. 23 (3), 031302
- https://doi.org/10.1103/physrevaccelbeams.23.031302
Abstract
Particle emittance quantifies the ability to focus and transport a beam, and is one of the most important parameters for a beamline. The emittance of a proton beam produced by ultraintense laser irradiation of a micron-thick flat solid target has been measured systematically for the first time, using three different methods at different positions along the transport beamline: pepper-pot method, quadrupole triplet scan technique, and single-shot emittance measurement. Emittance growth is shown both in experiments and in simulations using CST. An over 3-fold emittance growth was found for 5 MeV laser-driven protons with an energy spread of and divergence of after being transported 5.9 m in the experiment, due to the energy spread and angular dispersion of the protons.
Funding Information
- National Natural Science Foundation of China (11975037, 11475010, 11921006, 11535001)
- ITER-China Program (GB120001)
- National Grand Instrument Project (SQ2019YFF010006)
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