3D modeling activity for novel high power electron guns at SLAC

Abstract

The next generation of powerful electronic devices requires new approaches to overcome the known limitations of existing tube technology. Multi-beam and sheet beam approaches are novel concepts for the high power microwave devices. Direct and indirect modeling methods are being developed at SLAC to meet the new requirements in the 3D modeling. The direct method of solving of Poisson's equations for the multi-beam and sheet beam guns is employed in the TOPAZ 3D tool. The combination of TOPAZ 2D and EGUN (in the beginning) with MAFIA 3D and MAGIC 3D (at the end) is used in an indirect method to model the high power electron guns. Both methods complement each other to get reliable representation of the beam trajectories. Several gun ideas are under consideration at the present time. The collected results of these simulations are discussed.

Conceptual design report: a ring-based electron cooling system for the EIC

“…Different codes have different artificial effects, which lead to emittance overestimation. We used 3D MICHELLE code [41] and 2D WinSAM code [42]. The MICHELLE code has a modern interface but has significant artificial aberrations and noise.…”

Recent Measurements and Plans for the SLAC Compton X- Ray Source

“….99 4.6 4.5 10. 5 1.4 9.1 9.0 Table 1. Comparison of beam current measured in Spectrometer with in-line current.…”

“…To increase the Terahertz power further, the RF power source must operate at a higher repetition rate. Investigation into the feasibility of a gridded Sheet-beam Klystron is being investigated at SLAC [5]. …”

Green's Function Technique in Forming Intensive Beams

“…In this case, evaluation of derivatives is performing with no accuracy loss in contrast to using the correspondent numerical scheme. The algorithms and numerical results presented in this paper stem from the earlier works of the author [1]- [3]. Some other computationally fast approaches based on the Green's function formalism (so-called "templates") have been developed [4]- [5], such as the analytical representation of the field of an ellipsoidal bunch [6].…”