  We have developed multi-gap resistive plate chambers (MRPCs) with 2.5 x 200
cm2 readout strips for the time-of-flight (TOF) detector system of the LEPS2
experiment at SPring-8. These chambers consist of 2 stacks and 5 gas gaps per
stack, in a mirrored configuration. A time resolution of sigma ~ 80 ps was
achieved for any position within a strip (at above 99% detection efficiency);
after performing the time-charge slewing correction, this value could be
reduced to 60 ps. A link between the small contribution of the slewing
correction to timing and the suppression of modal dispersion in the detector
could be established.
