Optimization of the pumping laser beam spatial profile in the MEOP experiment performed at elevated 3He pressuresT. Dohnalik, A. Nikiel, T. Pałasz, M. Suchanek, G. Collier, M. Greńczuk, B. Głowacz and Z. OlejniczakEur. Phys. J. Appl. Phys., 54 2 (2011) 20802DOI: https://doi.org/10.1051/epjap/2011100493