Controlling laser driven protons acceleration using a deformable mirror at a high repetition rate

M. Noaman-ul-Haq, T. Sokollik, H. Ahmed, J Braenzel, L Ehrentraut, M Mirzaie, L.-L Yu, Z.M. Sheng, L Chen, M Schnurer, J Zhang

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Abstract

We present results from a proof-of-principle experiment to optimize energy spectrum of laser driven protons by directly feeding back its spectral information to a deformable mirror (DM) controlled by evolutionary algorithms (EAs). By irradiating a stable high-repetition rate tape driven target with ultra-intense pulses of ∼1020 W/cm2, we optimize the maximum energy of the accelerated protons with a stability of less than ∼5% fluctuations near optimum value. Moreover, due to spatio-temporal development of the sheath field, modulations in the spectrum are also observed. Particularly, a prominent narrow peak is observed with a spread of ∼15% (FWHM) at low energy part of the spectrum. These results are helpful to develop high repetition rate optimization techniques required for future laser-driven ion accelerators.
Original languageEnglish
JournalNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Early online date24 Nov 2017
DOIs
Publication statusEarly online date - 24 Nov 2017

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