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Instability-free ion acceleration by two laser pulses |
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| Authors: | M.L. Zhou S. Zhao H.Y. Wang C. Lin H.Y. Lu Y.R. Lu T. Tajima X.T. He C.E. Chen Y.Q. Gu X.Q. Yan |
| Affiliation: | 1. State Key Laboratory of Nuclear Physics and Technology, and Key Laboratory of HEDP of the Ministry of Education, CAPT, Peking University, Beijing, 100871, China 5. Helmholtz Institute Jena, Fr?belstieg 3, 07743, Jena, Germany 2. International Centre for Zetta-Exawatt Science and Technology (IZEST), California, USA 3. Department of Physics and Astronomy, UC Irvine, Irvine, CA, 92697, USA 4. Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang, 621900, China |
| Abstract: | We demonstrate the instability-free ion acceleration regime by introducing laser control with two parallel circularly polarized laser pulses at an intensity of I = 6.8 × 1021?W/cm2, normally incident on a hydrogen foil. The special structure of the equivalent wave front of those two pulses, which contains Gaussian peaks in both sides and a concavity in the centre (2D), can suppress the transverse instabilities and hole boring effects to constrain a high density ion clump in the centre of the foil, leading to an acceleration over a long distance and gain above 1GeV/u for the ion bunches. |
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