Solenoid in the low energy beam transport line used for
focusing 100 keV electron beam has also been utilized as a beam
diagnostic tool. 4D transverse emittance has been determined by
analyzing the second moment beam distribution on a view screen
placed downstream using solenoid scan technique which require no
a-priori assumptions of the input beam. The measured transverse
emittance is compared with the emittance tomographically
reconstructed from the measured beam profiles corresponding to the
same set of solenoidal fields in the solenoid scan.