The Pohang Light Source (PLS) is the first synchrotron light source in Korea. It consists of a 150

m long 2 GeV injection linac and a 280 m circumference storage ring. It is a third generation

light source with the design beam emittance of 12 nmrad. Basically it is a research facility for

nationwide users. Hence its operational missions are; fast and efficient injection from the linac

to the storage ring, storing stable electron beam, and supplying as many hours of beam time as

possible to users. These missions are carried out by 139 laboratory members. The operation

group, consisting of 19 members of scientists, engineers, and technicians, is responsible for

operation management, control system, instruments, and physics, while most of the PAL

members are assigned to the operational shift duty once a week in average. The poster shows

details of how the PLS operation group does the business. In Table 1, we summarize the

operational statistics.

Table 1. Operational statistics for 1997 run.

* From September and December

# Estimated

+ Counted only for scheduled operations