  A conventional method to determine beam parameters is using the profile
measurements and converting them into the values of twiss parameters and beam
emittance at a specified position. The beam information can be used to improve
transverse beam matching between two different beam lines or accelerating
structures. This work is related with the measurement error effects of the beam
parameters and the optimal number of profile monitors in a section between MEBT
(medium energy beam transport) and QWR (quarter wave resonator) of RAON linear
accelerator.
