PCaPAC2016 - List of Keywords (cavity)

Paper	Title	Other Keywords	Page
WECSPLCO03	Software Tests and Simulations for Control Applications Based on Virtual Time	ion, controls, software, low-level-rf	10
	M. Hierholzer, M. Killenberg, T. Kozak, N. Shehzad, G. Varghese, M. Viti DESY, Hamburg, Germany
	Ensuring software quality is important, especially for control system applications. Writing tests for such applications requires replacing the real hardware with a virtual implementation in software. Also the rest of the control system which interacts with the application must be replaced with a mock. In addition, time must be controlled precisely. We present the VirtualLab framework as part of the Chimera Tool Kit (formerly named MTCA4U). It has been designed to help implementing such tests by introducing the concept of virtual time, and combining it with an implementation basis for virtual devices and plant models. The virtual devices are transparently plugged into the application in place of real devices. Also tools are provided to simplify the simulated interaction with other parts of the control system. The framework is designed modularly so that virtual devices and model components can be reused to test different parts of the control system software. It interacts seamlessly with the other libraries of the Chimera Tool Kit such as DeviceAccess and the control system adapter.
	Slides WECSPLCO03 [8.642 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2016-WECSPLCO03
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FRFMPLCO01	Status of the NSLS-II LLRF System	ion, feedback, FPGA, controls	129
	C. Marques, F. Gao, B. Holub, J. Rose, N.A. Towne, G.M. Wang BNL, Upton, Long Island, New York, USA
	Funding: NSLS-II, a U.S. Department of Energy Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory under Contract No. DE-SC0012704. The NSLS-II RF system uses an in-house FPGA based low level RF (LLRF) solution called the Cavity Field Controller (CFC). The CFC directs the amplitude and phase for the high power RF and directly influences beam acceleration and stability. In this paper we discuss a logically embedded Network Analyzer (NA) in situ with the digital feedback loop controlled via a MATLAB or EPICS interface. The embedded NA was used to evaluate the RF feedback stability and influence of the feedback parameters on the beam. We will also discuss diagnostics tools to investigate longitudinal beam dynamics and other functionality embedded into the FPGA fabric. Future development of the CFC implementation and hardware upgrades will also be discussed.
	Slides FRFMPLCO01 [2.270 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2016-FRFMPLCO01
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FRFMPLIO03	Overview of Some Feedback & Control Systems at Synchrotron Soleil	ion, controls, feedback, synchrotron	132
	C. Engblom, Y.-M. Abiven, F. Blache, D.C. Corruble, A. Dawiec, M. Diop, N. Hubert, N. Jobert, S.K. Kubsky, F. Langlois, P. Marchand, G. Renaud SOLEIL, Gif-sur-Yvette, France T. Stankevic MAX IV Laboratory, Lund University, Lund, Sweden
	This paper gives an overview of some feedback & control systems in Synchrotron SOLEIL that are in use or in development today. Electron Beam stability is something that is being addressed in several SOLEIL applications; Fast Orbit Feedback is a multi-input multi-output control system made to stabilize beam position perturbations with slow and fast corrections. In addition, active RF cavities are used to maintain stable beam energy & spread as well as keeping electron density even throughout the storage ring. Beam stability also comes from feedforward non-linear control in particle trajectory compensation on both sides of electromagnetic undulators. On beamlines, multi-actuator piezos or pneumatics are used to regulate photon flux to keep within detector operating range; a method to maximize the photon flux while keeping detector below damage thresholds. Currently in development at the sample stage level, the Nanoprobe Project (collaboration MAXIV & Soleil) focuses on sample stabilization during step- & fly- scans which is realized through multi-axis nano-positioning with high- & low- frequency closed-loop control implementing interferometer feedback &/or compensation tables.
	Slides FRFMPLIO03 [6.248 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2016-FRFMPLIO03
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

WECSPLCO03

Software Tests and Simulations for Control Applications Based on Virtual Time

ion, controls, software, low-level-rf

10

M. Hierholzer, M. Killenberg, T. Kozak, N. Shehzad, G. Varghese, M. Viti
DESY, Hamburg, Germany

Ensuring software quality is important, especially for control system applications. Writing tests for such applications requires replacing the real hardware with a virtual implementation in software. Also the rest of the control system which interacts with the application must be replaced with a mock. In addition, time must be controlled precisely. We present the VirtualLab framework as part of the Chimera Tool Kit (formerly named MTCA4U). It has been designed to help implementing such tests by introducing the concept of virtual time, and combining it with an implementation basis for virtual devices and plant models. The virtual devices are transparently plugged into the application in place of real devices. Also tools are provided to simplify the simulated interaction with other parts of the control system. The framework is designed modularly so that virtual devices and model components can be reused to test different parts of the control system software. It interacts seamlessly with the other libraries of the Chimera Tool Kit such as DeviceAccess and the control system adapter.

Slides WECSPLCO03 [8.642 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2016-WECSPLCO03

Export •

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

FRFMPLCO01

Status of the NSLS-II LLRF System

ion, feedback, FPGA, controls

129

C. Marques, F. Gao, B. Holub, J. Rose, N.A. Towne, G.M. Wang
BNL, Upton, Long Island, New York, USA

Funding: NSLS-II, a U.S. Department of Energy Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory under Contract No. DE-SC0012704.
The NSLS-II RF system uses an in-house FPGA based low level RF (LLRF) solution called the Cavity Field Controller (CFC). The CFC directs the amplitude and phase for the high power RF and directly influences beam acceleration and stability. In this paper we discuss a logically embedded Network Analyzer (NA) in situ with the digital feedback loop controlled via a MATLAB or EPICS interface. The embedded NA was used to evaluate the RF feedback stability and influence of the feedback parameters on the beam. We will also discuss diagnostics tools to investigate longitudinal beam dynamics and other functionality embedded into the FPGA fabric. Future development of the CFC implementation and hardware upgrades will also be discussed.

Slides FRFMPLCO01 [2.270 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2016-FRFMPLCO01

Export •

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

FRFMPLIO03

Overview of Some Feedback & Control Systems at Synchrotron Soleil

ion, controls, feedback, synchrotron

132

C. Engblom, Y.-M. Abiven, F. Blache, D.C. Corruble, A. Dawiec, M. Diop, N. Hubert, N. Jobert, S.K. Kubsky, F. Langlois, P. Marchand, G. Renaud
SOLEIL, Gif-sur-Yvette, France
T. Stankevic
MAX IV Laboratory, Lund University, Lund, Sweden

This paper gives an overview of some feedback & control systems in Synchrotron SOLEIL that are in use or in development today. Electron Beam stability is something that is being addressed in several SOLEIL applications; Fast Orbit Feedback is a multi-input multi-output control system made to stabilize beam position perturbations with slow and fast corrections. In addition, active RF cavities are used to maintain stable beam energy & spread as well as keeping electron density even throughout the storage ring. Beam stability also comes from feedforward non-linear control in particle trajectory compensation on both sides of electromagnetic undulators. On beamlines, multi-actuator piezos or pneumatics are used to regulate photon flux to keep within detector operating range; a method to maximize the photon flux while keeping detector below damage thresholds. Currently in development at the sample stage level, the Nanoprobe Project (collaboration MAXIV & Soleil) focuses on sample stabilization during step- & fly- scans which is realized through multi-axis nano-positioning with high- & low- frequency closed-loop control implementing interferometer feedback &/or compensation tables.

Slides FRFMPLIO03 [6.248 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2016-FRFMPLIO03

Export •

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