Speaker
Description
The RF photoinjector in LCLS-II produces several microamperes of dark current via field emission. While the vast majority of this dark current is collimated before reaching the first cryomodule, a small amount (typically less than 1 nA) is transported all the way to the beam switchyard (BSY) dump. In this contribution, we present the results of a start-to-end model of the transport of the dark current through the LCLS-II accelerator, including loss patterns under common machine tuning configurations and evolution of the dark current’s phase space distribution. Understanding the phase space distribution in the BSY will benefit future experiments on the Linac-to-End Station A (LESA) beamline, including searches for dark matter, by enhancing our ability to tune the LESA optics to properly transport the dark current to the experiment.
Funding Agency
Work supported by the U.S. Department of Energy under Contract No. DE-AC02-76SF00515.
| Region represented | America |
|---|---|
| Paper preparation format | LaTeX |
