arXiv:2009.00270physics.acc-ph
Concept Study of a Compact, High Gradient X-band Travelling Wave RF Photogun with Novel Laser Coupling Scheme
Early discovery. Linked by one identifiable commenter. This paper is outside the main ranking; a mention is not an endorsement.
Abstract
This paper presents the design of a travelling wave RF photogun operating at the European X-band frequency of 11.994 GHz. The design is based on a CLIC prototype structure milled from copper halves and uses the unique gap introduced in the geometry to couple in the laser without obstructing the outgoing electron beam. With a modest peak input power of 19 MW and a fill time of 48 ns, the gun has the ability to operate at very high RF pulse repetition rates in comparison to standing wave RF photoguns. For its nominal input power, the cathode has a peak gradient of 91 MV/m and the entire gun has a gradient of 65 MV/m. The gun is illustrated to provide an 80 pC bunch at a 14.15 MeV with a 0.14 $\%$ RMS energy spread and an emittance of 0.6 mm mrad at a repetition rate of at least 450 Hz.
Looks like the new tech here is a "traveling wave RF photogun" used to accelerate the electrons. Here's a preprint from 2020 by the researchers that I'm assuming describes their tech: https://arxiv.org/abs/2009.00270 (Edit: Removed speculation that the system architecture was…
itishappyView on HNParent context