16/11/2016
Delivery of hybrid photoinjector

The hybrid photoinjector is a high current, low emittance electron beam photoinjector/accelerator composed of an RF gun and a short linac designed in collaboration with UCLA.

It combines a 1.6 cell standing wave gun with a traveling wave accelerator. The whole structure is made out of OFHC copper.

This accelerator offers improvements on beam parameters and represents a solution for better power efficiency. Therefore, electron bunches are accelerated to higher energies with less RF input power in contrast to similar systems. It is possible to achieve beam energies up to 21 MeV with an input RF power of only 25MW.

Its hybrid quality allows for a more compact system, therefore reducing the real estate needed.

The structure is fed through a dual feed input coupler.

All components were brazed inside a UHV furnace at Comeb’s facility.

Accelerator parameters:

-Resonant frequency:                      2856 MHz

-SW cavity mode:                           pi mode

-TW cavity mode:                           2pi/3 mode

-RF power:                                    25 MW

-Peak field strength in SW:              60 MV/m

-Average acc. Field strength in TW:   13 MV/m