No abstract

The Advanced Photon Source (APS), in conjunction with Advanced Electronics Technologies Associates (AET), is developing newly designed thermionic-cathode rf guns to replace our aging (circa 1992) guns. Each of the three third-generation injectors will meet or exceed the present high-performance electron beam of its secondgeneration predecessor. Moreover, the new injector design addresses the historical difficulties of maintenance, reliability, and sparse documentation associated with the previous injectors. Engineering design improvements and required performance of the guns will be presented following a brief examination of the APS secondgeneration guns for comparison.

No abstract

In general, mechanical systems for particle accelerators are designed to remain stationary after they have been aligned. At the Advanced Photon Source (APS), a new device has been developed for the low-energy undulator test line (LEUTL), an experimental free-electron laser, that allows the components to be easily installed, removed, or exchanged without additional survey or alignment. A pair of high-precision linear guide rails fastened to a welded aluminum box beam provides the structure for this versatile and innovative method. The precision of this system exceeds ± 380 µm along the beam axis and transverse to the beam. Design details and analysis are described as well as the present capabilities and those planned for the future.

No abstract