Measurements of electron beam parameters on the reference extraction line at Hiroshima University

Studying the particle beam in accelerators is an important task. As more precise measurements are required, the more important the beam information (or conditions) for an accelerator has become. Twiss parameters and emittance are used to represent the beam condition. Twiss parameters are usually determined by calculating the spatial distribution data under various operating conditions of the beam line, based on orbit theory. The ability to manipulate in a controlled and measurable way the orientation and form of the phase ellipse with quadrupoles gives us the tool to experimentally determine the emittance of a particle beam.