Gigahertz repetition rate thermionic electron gun concept

Cid Thermionic Gun System*

A new high-current thermionic gun has been installed on the CID injector at SLAC and brought into operation. The gun and pulser system generate three nanosecond pulses of about six amps peak which, when bunched in the subharmonic buncher system, produce in excess of 1011 electrons in a single S-band accelerated bunch. Preliminary operation of the gun is described, and details of the avalanche c...

Diode-Pumped Gigahertz Repetition Rate Femtosecond Cr:Lisaf Laser Citation

We report a low-cost, 1 GHz repetition-rate, diode-pumped, saturable Bragg reflectors modelocked Cr:LiSAF laser, which generates nearly transform-limited 103-fs long pulses around 866 nm, with a record high peak power of 1.45 kW. 2010 Optical Society of America OCIS codes: (140.3460) Lasers; (140.3480) Lasers, diode pumped; (140.4050) Mode-locked lasers High repetition-rate femtosecond (fs) la...

Communication: Effects of thermionic-gun parameters on operating modes in ultrafast electron microscopy

Ultrafast electron microscopes with thermionic guns and LaB6 sources can be operated in both the nanosecond, single-shot and femtosecond, single-electron modes. This has been demonstrated with conventional Wehnelt electrodes and absent any applied bias. Here, by conducting simulations using the General Particle Tracer code, we define the electron-gun parameter space within which various modes m...

Low Emittance Thermionic Electron Guns*

Harmonically pumped femtosecond optical parametric oscillator with multi-gigahertz repetition rate.

We report a multi-gigahertz (GHz) repetition-rate femtosecond MgO:PPLN optical parametric oscillator (OPO) harmonically pumped by a 75.6 MHz Kerr-lens mode-locked Yb:KGW laser. By fractionally increasing the OPO cavity length, we obtained OPO operation up to the 493rd harmonic of the pump laser repetition rate, corresponding to a repetition rate as high as 37.3 GHz. Using a 1.5% output coupler,...