LIGO Document T1100332-v1

Surface charge control of the Advanced LIGO mirrors using externally introduced ions

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T - Technical notes
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The surface charge on the LIGO mirrors can be neutralized by introducing positive and negative ions in a clean carrier gas. The note describes a system developed to neutralize surface charge densities as large as 10^-10 coulombs/cm^2 on the mirrors in the BSC chambers.
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