The K-L and muon detection subsystem (KLM) of the BELLE experiment at the K
EK-B asymmetric B-factory is described. The system consists of glass-electr
ode resistive plate counters installed within the segmented flux return iro
n of the BELLE superconducting solenoid. The design and construction of the
detectors, including the gas distribution system and readout electronics,
are described in detail. The operating characteristics and performance with
cosmic rays and e(+)e(-) collision data are presented. (C) 2000 Elsevier S
cience B.V. All rights reserved.