ICALEPCS2019 - List of Authors (Montironi, M.A.)

Paper	Title	Page
WECPL03	Implementation of the Motion Control System for LCLS-II Undulators	915
	M.A. Montironi, C.J. Andrews, H. Bassan, K.R. Lauer, Yu.I. Levashov, H.-D. Nuhn, Z.R. Wolf SLAC, Menlo Park, California, USA Ž. Oven Cosylab, Ljubljana, Slovenia
	As part of the LCLS upgrade called LCLS-II, two new undulator lines were introduced: a soft X-Ray line (SXR) and a hard H-Ray line (HXR). Serving distinct purposes, the two undulator lines employ different undulator designs. The SXR line is composed of 21 vertical gap, horizontally polarized undulators while the HXR line is composed of 32 undulator segments designed to operate on the horizontal axis and to produce a vertically polarized beam. The HXR undulators will replace the LCLS ones and thus the control system was designed with the main goal of maximizing the re-utilization of existing hardware and software. For this purpose, the motion control system based on RTEMS running on VME with Animatics SmartMotors was developed as an upgrade of the LCLS design and the cam-based undulator girder positioning system has been reused. The all new SXR undulators employ a new control system design based on Aerotech motion controllers and EPICS soft IOCs (input-output controllers). This paper describes how the most challenging motion control requirements were implemented focusing on motion synchronization, K-value to gap transformation, cams kinematics and calibration, and user interaction.
	Slides WECPL03 [0.625 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WECPL03
About •	paper received ※ 29 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPHA099	XLEAP-II Motion Control	1325
	M.A. Montironi, H. Bassan, M.A. Carrasco, E.M. Kraft, A. Marinelli SLAC, Menlo Park, California, USA
	The XLEAP project was conceived with the main scope of extending the generation of ultrashort pulses at LCLS to the sub-femtosecond (sub-fs) regime. As the project produced the expected results, an upgrade called XLEAP-II is being designed to provide the same functionality to LCLS-II. The XLEAP project utilized one variable gap wiggler to produce sub-fs X-ray pulses. The upgrade will involve four additional wigglers in the form of repurposed LCLS fixed gap undulators mounted on translation stages. This paper describes the design of the hardware and software architecture utilized in the motion control system of the wigglers. First it discusses how the variable gap wiggler was upgraded to be controlled by an Aerotech Ensemble motion controller through an EPICS Soft IOC (input-output controller). Then the motion control strategy for the additional four wigglers, also based around Aerotech controllers driving servomotors, is presented. Lessons learned from operating the wiggler and undulators during LCLS operation are discussed and utilized as a base upon which the upgraded motion control system is designed and built. Novel challenges are also identified and mitigations are discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA099
About •	paper received ※ 01 October 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Implementation of the Motion Control System for LCLS-II Undulators

915

M.A. Montironi, C.J. Andrews, H. Bassan, K.R. Lauer, Yu.I. Levashov, H.-D. Nuhn, Z.R. Wolf
SLAC, Menlo Park, California, USA
Ž. Oven
Cosylab, Ljubljana, Slovenia

As part of the LCLS upgrade called LCLS-II, two new undulator lines were introduced: a soft X-Ray line (SXR) and a hard H-Ray line (HXR). Serving distinct purposes, the two undulator lines employ different undulator designs. The SXR line is composed of 21 vertical gap, horizontally polarized undulators while the HXR line is composed of 32 undulator segments designed to operate on the horizontal axis and to produce a vertically polarized beam. The HXR undulators will replace the LCLS ones and thus the control system was designed with the main goal of maximizing the re-utilization of existing hardware and software. For this purpose, the motion control system based on RTEMS running on VME with Animatics SmartMotors was developed as an upgrade of the LCLS design and the cam-based undulator girder positioning system has been reused. The all new SXR undulators employ a new control system design based on Aerotech motion controllers and EPICS soft IOCs (input-output controllers). This paper describes how the most challenging motion control requirements were implemented focusing on motion synchronization, K-value to gap transformation, cams kinematics and calibration, and user interaction.

Slides WECPL03 [0.625 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WECPL03

About •

paper received ※ 29 September 2019 paper accepted ※ 09 October 2019 issue date ※ 30 August 2020

Export •

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

WEPHA099

XLEAP-II Motion Control

1325

M.A. Montironi, H. Bassan, M.A. Carrasco, E.M. Kraft, A. Marinelli
SLAC, Menlo Park, California, USA

The XLEAP project was conceived with the main scope of extending the generation of ultrashort pulses at LCLS to the sub-femtosecond (sub-fs) regime. As the project produced the expected results, an upgrade called XLEAP-II is being designed to provide the same functionality to LCLS-II. The XLEAP project utilized one variable gap wiggler to produce sub-fs X-ray pulses. The upgrade will involve four additional wigglers in the form of repurposed LCLS fixed gap undulators mounted on translation stages. This paper describes the design of the hardware and software architecture utilized in the motion control system of the wigglers. First it discusses how the variable gap wiggler was upgraded to be controlled by an Aerotech Ensemble motion controller through an EPICS Soft IOC (input-output controller). Then the motion control strategy for the additional four wigglers, also based around Aerotech controllers driving servomotors, is presented. Lessons learned from operating the wiggler and undulators during LCLS operation are discussed and utilized as a base upon which the upgraded motion control system is designed and built. Novel challenges are also identified and mitigations are discussed.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA099

About •

paper received ※ 01 October 2019 paper accepted ※ 10 October 2019 issue date ※ 30 August 2020

Export •

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