We present the development and status of a traditional UCLA/BNL/SLAC style 1.5 cell photoinjector with an additional half cell downstream to aid in longitudinal pulse compression. The work presented includes radio frequency design via SuperFish and HFSS as well as beam dynamics simulation using PARMELA. We investigate longitudinal compression of an electron beam in this extra downstream half ce...

A compact standing-wave linac has been designed using S-band microwaves for medical and industrial applications. It uses a bi-periodic structure with constant impedance. It consists of a buncher section with three-cells and on-axis coupled cavities with nine-cells. The total length is 740.0 mm including the electron gun. Using SUPERFISH, HFSS and PARMELA codes, it is capable to deliver 4.5 MeV ...

A 204MHz all copper RF cavity was designed for the phase II project of Hefei Light Source (HLS). The requirements of the storage ring, which will operate in General Purpose Light Source (GPLS) mode and High Brightness Light Source (HBLS) mode, determine the main parameters of the cavity. On the basis of the simulation of SUPERFISH, three kinds of cavity shape were designed, and one optimum shap...

RadiaBeam Technologies reports on the RF design and fabrication of a ultra-high gradient (50 MV/m) S-Band accelerating structure (HGS) operating in the pi-mode at 2.856 GHz. The compact HGS structure offers a drop-in replacement for conventional S-Band linacs in research and industrial applications such as drivers for compact light sources, medical and security systems. The electromagnetic desi...

For high current applications, it is desirable for the cavity shape to have a low longitudinal loss factor and to have a high beam-breakup threshold current. This paper briefly describes three different cavities designed for this purpose: a six-cell elliptical cavity for particles traveling at the speed of light, a two-cell elliptical cavity for subluminal particle speeds, and a single cell cav...

The novel Superconducting Photocathode Electron Gun being developed by Advanced Energy Systems and Brookhaven National Laboratory was analyzed to determine surface temperature and stress levels from RF and laser heat loads while being cooled in a helium bath. Optimization of geometry with respect to thermal loads was required when looking at 4.2K vs. 1.8K bath temperature. Heat loads were devel...