Time resolved emittance measurement in the University of Maryland Electron Ring

Initial experimental results are presented for measurements of the emittance of an electron beam in the University of Maryland Electron Ring (UMER). Two independent sets of slit-collector systems are used to measure the emittance in the vertical and horizontal directions respectively. Results are then compared to the time integrated emittance measurements obtained from a pepperpot. The UMER electron beam has an energy of 10 keV, with as much as 100 mA of current, and pulse length of 100 ns. The beam is confined by a periodic lattice of focusing/defocusing quadrupole magnets at 16 cm intervals. Beam steering is achieved with dipole magnets at 32 cm intervals and additional small steering dipoles as needed.