hi, All Here are plots for SoLID SIDIS setup TOF pid http://hallaweb.jlab.org/12GeV/SoLID/download/pid/tofpid_SIDIS_FA.png http://hallaweb.jlab.org/12GeV/SoLID/download/pid/tofpid_SIDIS_LA.png The flight distance is about 2.9m for LA and 7.7m for FA Zhiwen