ANL, Lemont, Illinois, USA
A novel design for a weldable copper chromium zirconium (CuCrZr) mask has been developed for use in Advanced Photon Source Upgrade (APSU) beamlines. In the past, welding has been avoided for CuCrZr; however, the approach this alternative utilizes promises to drastically reduce cost and lead time over traditional brazed CuCrZr and welded Glidcop mask designs. Multiple thermal analyses of the mask have predicted that it will meet required mechanical and thermal requirements suitable for high heat load applications. As of the writing of this paper, a prototype is being fabricated for installation and testing on the 28-ID Coherent High Energy X-ray (CHEX) beamline.
ANL, Lemont, Illinois, USA
SLAC, Menlo Park, California, USA
The concept behind the cavity-based X-ray FELs (CBXFELs) such as the X-ray free-electron laser oscillator (XFELO)* and the X-ray regenerative amplifier free-electron laser (XRAFEL)** is to form an X-ray cavity with a set of narrow bandwidth diamond Bragg crystals. Storing and recirculating the output of an amplifier in an X- ray cavity so that the X-ray pulse can interact with following fresh electron bunches over many passes enables the development of full temporal coherence. One of the key challenges to forming the X-ray cavity is the precision of the cavity mechanical system design and construction. In this paper, we present conceptual design of the cavity mechanical system that is currently under development for use in a proof-of-principle cavity-based X-ray free electron laser experiment at the LCLS-II at SLAC.
*Kwang-Je Kim et al., TUPRB096, Proceedings of IPAC2019
**Gabe Marcus et al., TUD04, Proceedings of IPAC2019