Energy-spread measurement of triple-pulse electron beams based on the   magnetic dispersion principle
  The energy-spread of the triple-pulse electron beam generated by the Dragon-II linear induction accelerator is measured using the method of energy dispersion in the magnetic field. A sector magnet is applied for energy analyzing of the electron beam, which has a bending radius of 300 mm and a deflection angle of 90 degrees. For each pulse, both the time-resolved and the integral images of the electron position at the output port of the bending beam line are recorded by a streak camera and a CCD camera, respectively. Experimental results demonstrate an energy-spread of less than +-2.0% for the electron pulses. The cavity voltage waveforms obtained by different detectors are also analyzed for comparison. 
Yi Wang, Qin Li, Zhiyong Yang, Huang Zhang, Hengsong Ding, Anmin Yang,   and Minhong Wang
physics.acc-ph