Simulation of curved axis systems

✍ Scribed by John A. Rouse; Eric Munro; Liping Wang; Haoning Liu

• Publisher: Elsevier
• Year: 2008
• Tongue: English
• Weight: 803 KB
• Volume: 1
• Category: Article
• ISSN: 1875-3892
• DOI: 10.1016/j.phpro.2008.07.126

✦ Synopsis

In this paper we describe the software tools that we have developed for the analysis of charged particle optical systems with curved optical axes. Examples of such elements are: omega filters, which are used for energy selection; magnetic prisms, used for bending and separating beams; Wien filters, which can be used for separating two beams of different mass or velocity; and wide angle scanning systems where aberrations referred to a straight optical axis can become meaningless. The analysis of curved axis systems can be sub-divided into three main tasks: the computation of the electric and magnetic fields that the beam passes through; the computation of the axis path and the extraction of the necessary field quantities; and the computation of the optical properties and aberrations. We discuss the methods we've employed to accomplish these tasks and demonstrate the use of the software with some illustrative examples.