Parameters measurement of 100 keV gyral electron beam

Charge density distribution of the large-orbit hollow beam, which is applied to a Gyro-TWA, is obtained from time-integrated image. The image is created by a phosphor scintillator on the cross section vertical to the transmission axial. Comparison of average beam radius, beam pitch angle obtained from the images and from computer simulations and the differences were analyzed. The experimental results are consistent with the simulated ones and significant for the debugging of the Gyro-TWA using this gyral electron beam.