Abstract

A laser wire ion beam profile monitor system has been developed at the Spallation Neutron Source accelerator complex. The laser wire system uses a single laser source to measure the horizontal and vertical profiles of a pulsed hydrogen ion (${\mathrm{H}}^{-}$) beam along a $230\mathrm{m}$ long superconducting linac, which accelerates ${\mathrm{H}}^{-}$ from $200\mathrm{MeV}$ to $1\mathrm{GeV}$. In this paper, we describe the laser optics requirement for the system, the performance of the profile measurement, and the effects of laser parameters on the measurement reliability. The result provides a practical guideline for the development of a large-scale, operational, laser-based diagnostics in accelerator facilities.

© 2010 Optical Society of America

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