Sep 15 – 21, 2019
Hotel Hermitage, La Biodola Bay, Isola d'Elba, Italy
Europe/Rome timezone

Plasma Gratings as a Novel Target for Ion Acceleration

Sep 19, 2019, 6:00 PM
SBIO (Hotel Biodola)


Hotel Biodola

talk WG2 - Ion beams from plasmas WG2


Oliver Ettlinger (Imperial College London)


With the trend towards higher repetition rate laser systems for applications, there is a demand for new, high repetition rate target solutions. This talk will look at efforts to develop shaped, thin, near-critical density gas targets for radiation pressure driven ion acceleration experiments using the high power, $\mathrm{10.6}{\mu m}$ $\mathrm{CO_2}$ laser at Brookhaven National Laboratory. By suitably shaping a gas target, a ps laser pulse was used to first form a transient plasma grating structure in an underdense density ramp. Subsequently, protons were accelerated from the near-critical density plasma grating elements to multi-MeV energies, with few percent energy spreads with modest $\mathrm{\sim10^{15}\,Wcm^{-2}}$ laser intensities. The measured proton energies were more than twice that predicted by the hole-boring scaling, $E_i = 4I/n_cc$. Multiple spectral features were observed on a significant fraction of shots. These results will be discussed, along with some future directions.

Primary author

Oliver Ettlinger (Imperial College London)


Nicholas Dover (National Institutes for Quantum and Radiological Science and Technology) Dr Yu-hsin Chen (Naval Research Laboratory) Dr Mike Helle (Naval Research Laboratory) Emma-Jane DITTER (Imperial College London) George Hicks (Imperial College London) Daniel Gordon (Naval Research Laboratory) Dr Antonio Ting (University of Maryland ) Mikhail N. Polyanskiy Igor Pogorelsky (BNL) Zulfikar Najmudin (Imperial College London)

Presentation materials