  The mostly research fasten on high emission density of injector to study
electron beam's brightness in LIA. Using the injector(2MeV) was built to
research brightness of multi-pulsed high current(KA) electron beam, and
researchs three measurement method (the pepper-pot method, beam collimator
without magnetic field, beam collimator with magnetic field method) to detect
beam's brightness with time-resolved measurement system.
