Aleksandrov, A.V. Cousineau, S.M. Gorlov, T.V. Liu, Y. Rakhman, A. Shishlo, A.P. JACoW Publishing Geneva, Switzerland 2673-7000 978-3-95450-223-3 10.18429/JACoW-NAPAC2019-WEYBB5 English 639-641 WEYBB5 laser experiment linac cavity injection Contribution to a conference proceedings 2019 2019-10 https://doi.org/10.18429/JACoW-NAPAC2019-WEYBB5 http://jacow.org/napac2019/papers/weybb5.pdf Lasers have recently been used in many applications to H⁻ beams, including laser charge exchange, laser wire scanners, and laser temporal pulse patterning. The H⁻ beam in these applications has wide variation ofμpulse length width dependence on focusing of the RF cavities, energy spread of the beam, and space charge forces. Achieving the required laser pulse length for complete overlap with the H⁻ can be challenging in some scenarios when available laser power constrained. The scheme proposed here utilizes a crab-crossing concept between the laser and the ion beam to achieve overlap of a short laser pulse with an arbitrarily long H⁻ beam pulse. An experiment to test the hypothesis in the context of H⁻ charge exchange is described.