ICALEPCS2023 - List of Authors (Pino, C.B.)

Paper	Title	Page
WE1BCO07	The LCLS-II Precision Timing Control System	966
	T.K. Johnson, M.C. Browne, C.B. Pino SLAC, Menlo Park, California, USA
	The LCLS-II precision timing system is responsible for the synchronization of optical lasers with the LCLS-II XFEL. The system uses both RF and optical references for synchronization. In contrast to previous systems used at LCLS the optical lasers are shared resources, and must be managed during operations. The timing system consists of three primary functionalities: RF reference distribution, optical reference distribution, and a phase-locked loop (PLL). This PLL may use either the RF or the optical reference as a feedback source. The RF allows for phase comparisons over a relatively wide range, albeit with limited resolution, while the optical reference enables very fine phase comparison (down to attoseconds), but with limited operational range. These systems must be managed using high levels of automation. Much of this automation is done via high-level applications developed in EPICS. The beamline users are presented with relatively simple interfaces that streamline operation and abstract much of the system complexity away. The system provides both PyDM GUIs as well as python interfaces to enable time delay scanning in the LCLS-II DAQ.
	Slides WE1BCO07 [3.734 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-WE1BCO07
About •	Received ※ 06 November 2023 — Revised ※ 09 November 2023 — Accepted ※ 14 December 2023 — Issued ※ 20 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

The LCLS-II Precision Timing Control System

966

T.K. Johnson, M.C. Browne, C.B. Pino
SLAC, Menlo Park, California, USA

The LCLS-II precision timing system is responsible for the synchronization of optical lasers with the LCLS-II XFEL. The system uses both RF and optical references for synchronization. In contrast to previous systems used at LCLS the optical lasers are shared resources, and must be managed during operations. The timing system consists of three primary functionalities: RF reference distribution, optical reference distribution, and a phase-locked loop (PLL). This PLL may use either the RF or the optical reference as a feedback source. The RF allows for phase comparisons over a relatively wide range, albeit with limited resolution, while the optical reference enables very fine phase comparison (down to attoseconds), but with limited operational range. These systems must be managed using high levels of automation. Much of this automation is done via high-level applications developed in EPICS. The beamline users are presented with relatively simple interfaces that streamline operation and abstract much of the system complexity away. The system provides both PyDM GUIs as well as python interfaces to enable time delay scanning in the LCLS-II DAQ.

Slides WE1BCO07 [3.734 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-WE1BCO07

About •

Received ※ 06 November 2023 — Revised ※ 09 November 2023 — Accepted ※ 14 December 2023 — Issued ※ 20 December 2023

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)