Intense Low-Emittance-Electron-Gun Development at Phermex

Electron Cloud at Low Emittance in Cesrta*

The Cornell Electron Storage Ring (CESR) has been reconfigured as a test accelerator (CesrTA) for a program of electron cloud (EC) research at ultra low emittance. The instrumentation in the ring has been upgraded with local diagnostics for measurement of cloud density and with improved beam diagnostics for the characterization of both the low emittance performance and the beam dynamics of high...

Low Emittance Thermionic Electron Guns*

Generation of amplified picosecond square pulses for low emittance electron generation in photocathode RF-GUN

Amplified square shaped picosecond pulses was generated for low emittance electron beam generation in a photocathode RF-GUN. Square shaped pulses were generated by using Ti:sapphire amplifier system in inrfared region and then converted to ultraviolet region via third harmonics generation. Generated squares shaped pulses were measeured by crosscorrelation and spectral interferometric technique ...

Single Pulse Emittance Measurement Technique for Intense Relativistic Electron Beams

Emittance Growth of an Intense Electron in a Focusing Channel

We use the single-particle radial equation of motion to identify nonlinear forces which lead to an emittance growth in a focusing channel consisting of solenoids. For a uniform density beam, the two dominant effects are the axial velocity variations within a solenoid due to the particles’ azimuthal velocity and changes in the particle’s energy due to radial motion and the radial electric spacec...