Speaker
Dr
Zenghai Li
Description
Normal conducting accelerator structures such as the X-Band NLC structures and the CLIC structures have been found to suffer damage due to RF breakdown and/or dark current when processed to high gradients. Improved understanding of these issues is desirable for the development of structure designs and processing techniques to improve the structure performance at high gradient. While vigorous experimental efforts have been put forward to explore the gradient parameter space, comprehensive numerical simulations would help to gain insight of the problems via dark current and multipacting analysis. Over the past decade, SLAC has been developing a suite of 3D parallel finite-element codes aimed at high-accuracy, high-fidelity electromagnetic and beam physics simulations for the design and optimization of particle accelerators. Running on the latest supercomputers, these codes provide unprecedented capabilities in simulating large scale accelerator structure systems with realistic complexity of 3D details and with a fast turn around time. These codes have been applied to analyze the multipacting and dark current effects of the CLIC accelerator structures. This paper will present the progresses in the simulation of the CLIC HDX structure.
*This work was supported by DOE contract No. DE-AC02-76SF00515.