ICALEPCS2023 - List of Authors (Takahashi, C.)

Paper

Title

Page

Implementation of Model Predictive Control for Slow Orbit Feedback Control in MAX IV Accelerators Using PyTango Framework

116

C. Takahashi, J. Breunlin, Á. Freitas, M. Sjöström
MAX IV Laboratory, Lund University, Lund, Sweden
P. Giselsson, E. Jensen Gassheld, M. Karlsson
Lund University, Lund, Sweden

Achieving low emittance and high brightness in modern light sources requires stable beams, which are commonly achieved through feedback solutions. The MAX IV light source has two feedback systems, Fast Orbit Feedback (FOFB) and Slow Orbit Feedback (SOFB), operating in overlapping frequency regions. Currently in MAX IV, a general feedback device implemented in PyTango is used for slow orbit and trajectory correction, but an MPC controller for the beam orbit has been proposed to improve system robustness. The controller uses iterative optimisation of the system model, current measurements, dynamic states and system constraints to calculate changes in the controlled variables. The new device implements the MPC model according to the beam orbit response matrix, subscribes to change events on all beam position attributes and updates the control signal given to the slow magnets with a 10 Hz rate. This project aims to improve system robustness and reduce actuator saturation. The use of PyTango simplifies the implementation of the MPC controller by allowing access to high-level optimisation and control packages. This project will contribute to the development of a high-quality feedback control system for MAX IV accelerators.

Slides MO3AO02 [4.234 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-MO3AO02

About •

Received ※ 05 October 2023 — Revised ※ 09 October 2023 — Accepted ※ 14 November 2023 — Issued ※ 19 December 2023

Cite •

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

TUPDP084

Control System for the MAX IV Transverse Deflecting Cavity Beamline

Á. Freitas, N. Blaskovic Kraljevic, J. Brudvik, F.H. Holmlund, A. Johansson, M. Lindberg, E. Mansten, R. Svärd, C. Takahashi
MAX IV Laboratory, Lund University, Lund, Sweden

The MAX IV 3 GeV LINAC serves as a full-energy injector for two electron storage rings and as a driver for the Short Pulse Facility (SPF) and a future Soft X-ray Laser (SXL). To achieve high temporal resolution for longitudinal beam characterization, a transverse deflecting cavity (TDC) system has been developed and installed in a dedicated electron beamline downstream of the LINAC. The TDC beamline comprises two consecutive 3 m long transverse S-band RF structures, followed by a variable vertical deflector dipole magnet used as an energy spectrometer. In this paper, we present the newly implemented control system and scanning routines for data acquisition and analyses. The control system enables precise manipulation of the TDC system, ensuring accurate measurement of longitudinal beam characteristics. The scanning routines facilitate systematic data acquisition for comprehensive beam analysis.

Poster TUPDP084 [0.468 MB]

Cite •

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

TUPDP145

Position-Based Continuous Energy Scan Status at MAX IV

917

Á. Freitas, N.S. Al-Habib, B. Bertrand, M. Eguiraun, I. Gorgisyan, A.F. Joubert, J. Lidón-Simon, M. Lindberg, C. Takahashi
MAX IV Laboratory, Lund University, Lund, Sweden

The traditional approach of step scanning in X-ray experiments is often inefficient and may increase the risk of sample radiation damage. In order to overcome these challenges, a new position-based continuous energy scanning system has been developed at MAX IV Laboratory. This system enables stable and repeatable measurements by continuously moving the motors during the scan. Triggers are generated in hardware based on the motor encoder positions to ensure precise data acquisition. Prior to the scan, a list of positions is generated, and triggers are produced as each position is reached. The system uses Tango and Sardana for control and a TriggerGate controller to calculate motor positions and configure the PandABox, which generates the triggers. The system is capable of scanning a single motor, such as a sample positioner, or a combined motion like a monochromator and undulator. In addition, the system can use the parametric trajectory mode of IcePAP driver, which enables continuous scans of coupled axes with non-linear paths. This paper presents the current status of the position-based continuous energy scanning system for BioMAX, FlexPES, and FinEst beamlines at MAX IV and discusses its potential to enhance the efficiency and accuracy of data acquisition at beamline endstations.

Poster TUPDP145 [1.943 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-TUPDP145

About •

Received ※ 05 October 2023 — Revised ※ 23 October 2023 — Accepted ※ 29 November 2023 — Issued ※ 11 December 2023

Cite •

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

THMBCMO09

DAQ System Based on Sardana and PandABox for Combined SAXS, Fluorescence and UV-Vis Spectroscopy Techniques at MAX IV CoSAXS Beamline

V. Da Silva, R. Appio, M. Eguiraun, F. Herranz-Trillo, A.F. Joubert, M. Leorato, Y.L. Li, M. Lindberg, C. Takahashi, A.E. Terry
MAX IV Laboratory, Lund University, Lund, Sweden
C. Dicko
Lund Institute of Technology (LTH), Lund University, Lund, Sweden
W.T. Kitka
S2Innovation, Kraków, Poland

CoSAXS is the Coherent and Small Angle X-ray Scattering (SAXS) beamline placed at the diffraction-limited 3 GeV storage ring at MAX IV Laboratory. This paper presents the data acquisition (DAQ) strategy for combined SAXS, Ultraviolet-visible (UV-Vis) and Fluorescence Spectroscopy techniques. In general terms, the beamline control system is based on TANGO and on top of it, Sardana provides an advanced scan framework. Sardana performs the experiment orchestration, configuring and preparing the X-ray detector and the Spectrometers for UV-Vis and Fluorescence. Hardware triggers are used to synchronize the DAQ for the different techniques running simultaneously. The implementation is done using PandABox, which generates pulse trains for the X-ray detector and spectrometers. PandABox integration into the system is done with a Sardana Trigger Gate Controller, used to configure the pulse trains parameters as well to orchestrate the hardware triggers during a scan. This paper describes the individual techniques’ integration into the control system, the experiment orchestration and synchronization and the new experiment possibilities this multi-technique DAQ system brings to MAX IV beamlines.

Slides THMBCMO09 [0.570 MB]

Poster THMBCMO09 [1.600 MB]

Cite •

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

THPDP054

Fast, Fully Automated Continuous Energy Scan at the Biomax Beamline at Max IV Laboratory

I. Gorgisyan, P.J. Bell, M. Cascella, M. Eguiraun, Á. Freitas, A. Gonzalez, J. Lidón-Simon, J. Nan, C. Takahashi, T. Ursby
MAX IV Laboratory, Lund University, Lund, Sweden

BioMAX is an X-ray macromolecular crystallography (MX) beamline* at MAX IV Laboratory that delivers an X-ray beam with a photon flux of up to 1e13 ph/s. The photon energy at the beamline can be easily adjusted between 6 keV and 24 keV. At MX beamlines Single- and Multi-wavelength Anomalous Dispersion (SAD and MAD) methods are used for experimental phasing to reconstruct the macromolecular structures. To be able to benefit from these techniques, it is imperative for an MX beamline to have a fast and automated energy scan routine. This contribution reports on the newly implemented continuous energy scan procedure at BioMAX. The scan routine performs a synchronous motion of the undulator and monochromator motors to continuously scan the energy while measuring the fluorescence from the sample as the energy changes. The data acquisition during the scan is triggered by the actual energy value which is monitored throughout the scan at 1 MHz rate. The energy scan routine is fully automated and minimizes the radiation damage on the sample during the measurements. The scan itself is as short as one second making the overall procedure a factor of five faster than a conventional step scan.
* Ursby T. et al. "BioMAX - the first macromolecular crystallography beamline at MAX IV Laboratory." Journal of Synchrotron Radiation 27, 1415 - 1729, (2020).

Poster THPDP054 [4.700 MB]

Cite •

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

Paper	Title	Page
MO3AO02	Implementation of Model Predictive Control for Slow Orbit Feedback Control in MAX IV Accelerators Using PyTango Framework	116
	C. Takahashi, J. Breunlin, Á. Freitas, M. Sjöström MAX IV Laboratory, Lund University, Lund, Sweden P. Giselsson, E. Jensen Gassheld, M. Karlsson Lund University, Lund, Sweden
	Achieving low emittance and high brightness in modern light sources requires stable beams, which are commonly achieved through feedback solutions. The MAX IV light source has two feedback systems, Fast Orbit Feedback (FOFB) and Slow Orbit Feedback (SOFB), operating in overlapping frequency regions. Currently in MAX IV, a general feedback device implemented in PyTango is used for slow orbit and trajectory correction, but an MPC controller for the beam orbit has been proposed to improve system robustness. The controller uses iterative optimisation of the system model, current measurements, dynamic states and system constraints to calculate changes in the controlled variables. The new device implements the MPC model according to the beam orbit response matrix, subscribes to change events on all beam position attributes and updates the control signal given to the slow magnets with a 10 Hz rate. This project aims to improve system robustness and reduce actuator saturation. The use of PyTango simplifies the implementation of the MPC controller by allowing access to high-level optimisation and control packages. This project will contribute to the development of a high-quality feedback control system for MAX IV accelerators.
	Slides MO3AO02 [4.234 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-MO3AO02
About •	Received ※ 05 October 2023 — Revised ※ 09 October 2023 — Accepted ※ 14 November 2023 — Issued ※ 19 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPDP084	Control System for the MAX IV Transverse Deflecting Cavity Beamline
	Á. Freitas, N. Blaskovic Kraljevic, J. Brudvik, F.H. Holmlund, A. Johansson, M. Lindberg, E. Mansten, R. Svärd, C. Takahashi MAX IV Laboratory, Lund University, Lund, Sweden
	The MAX IV 3 GeV LINAC serves as a full-energy injector for two electron storage rings and as a driver for the Short Pulse Facility (SPF) and a future Soft X-ray Laser (SXL). To achieve high temporal resolution for longitudinal beam characterization, a transverse deflecting cavity (TDC) system has been developed and installed in a dedicated electron beamline downstream of the LINAC. The TDC beamline comprises two consecutive 3 m long transverse S-band RF structures, followed by a variable vertical deflector dipole magnet used as an energy spectrometer. In this paper, we present the newly implemented control system and scanning routines for data acquisition and analyses. The control system enables precise manipulation of the TDC system, ensuring accurate measurement of longitudinal beam characteristics. The scanning routines facilitate systematic data acquisition for comprehensive beam analysis.
	Poster TUPDP084 [0.468 MB]
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPDP145	Position-Based Continuous Energy Scan Status at MAX IV	917
	Á. Freitas, N.S. Al-Habib, B. Bertrand, M. Eguiraun, I. Gorgisyan, A.F. Joubert, J. Lidón-Simon, M. Lindberg, C. Takahashi MAX IV Laboratory, Lund University, Lund, Sweden
	The traditional approach of step scanning in X-ray experiments is often inefficient and may increase the risk of sample radiation damage. In order to overcome these challenges, a new position-based continuous energy scanning system has been developed at MAX IV Laboratory. This system enables stable and repeatable measurements by continuously moving the motors during the scan. Triggers are generated in hardware based on the motor encoder positions to ensure precise data acquisition. Prior to the scan, a list of positions is generated, and triggers are produced as each position is reached. The system uses Tango and Sardana for control and a TriggerGate controller to calculate motor positions and configure the PandABox, which generates the triggers. The system is capable of scanning a single motor, such as a sample positioner, or a combined motion like a monochromator and undulator. In addition, the system can use the parametric trajectory mode of IcePAP driver, which enables continuous scans of coupled axes with non-linear paths. This paper presents the current status of the position-based continuous energy scanning system for BioMAX, FlexPES, and FinEst beamlines at MAX IV and discusses its potential to enhance the efficiency and accuracy of data acquisition at beamline endstations.
	Poster TUPDP145 [1.943 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-ICALEPCS2023-TUPDP145
About •	Received ※ 05 October 2023 — Revised ※ 23 October 2023 — Accepted ※ 29 November 2023 — Issued ※ 11 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THMBCMO09	DAQ System Based on Sardana and PandABox for Combined SAXS, Fluorescence and UV-Vis Spectroscopy Techniques at MAX IV CoSAXS Beamline
	V. Da Silva, R. Appio, M. Eguiraun, F. Herranz-Trillo, A.F. Joubert, M. Leorato, Y.L. Li, M. Lindberg, C. Takahashi, A.E. Terry MAX IV Laboratory, Lund University, Lund, Sweden C. Dicko Lund Institute of Technology (LTH), Lund University, Lund, Sweden W.T. Kitka S2Innovation, Kraków, Poland
	CoSAXS is the Coherent and Small Angle X-ray Scattering (SAXS) beamline placed at the diffraction-limited 3 GeV storage ring at MAX IV Laboratory. This paper presents the data acquisition (DAQ) strategy for combined SAXS, Ultraviolet-visible (UV-Vis) and Fluorescence Spectroscopy techniques. In general terms, the beamline control system is based on TANGO and on top of it, Sardana provides an advanced scan framework. Sardana performs the experiment orchestration, configuring and preparing the X-ray detector and the Spectrometers for UV-Vis and Fluorescence. Hardware triggers are used to synchronize the DAQ for the different techniques running simultaneously. The implementation is done using PandABox, which generates pulse trains for the X-ray detector and spectrometers. PandABox integration into the system is done with a Sardana Trigger Gate Controller, used to configure the pulse trains parameters as well to orchestrate the hardware triggers during a scan. This paper describes the individual techniques’ integration into the control system, the experiment orchestration and synchronization and the new experiment possibilities this multi-technique DAQ system brings to MAX IV beamlines.
	Slides THMBCMO09 [0.570 MB]
	Poster THMBCMO09 [1.600 MB]
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPDP054	Fast, Fully Automated Continuous Energy Scan at the Biomax Beamline at Max IV Laboratory
	I. Gorgisyan, P.J. Bell, M. Cascella, M. Eguiraun, Á. Freitas, A. Gonzalez, J. Lidón-Simon, J. Nan, C. Takahashi, T. Ursby MAX IV Laboratory, Lund University, Lund, Sweden
	BioMAX is an X-ray macromolecular crystallography (MX) beamline* at MAX IV Laboratory that delivers an X-ray beam with a photon flux of up to 1e13 ph/s. The photon energy at the beamline can be easily adjusted between 6 keV and 24 keV. At MX beamlines Single- and Multi-wavelength Anomalous Dispersion (SAD and MAD) methods are used for experimental phasing to reconstruct the macromolecular structures. To be able to benefit from these techniques, it is imperative for an MX beamline to have a fast and automated energy scan routine. This contribution reports on the newly implemented continuous energy scan procedure at BioMAX. The scan routine performs a synchronous motion of the undulator and monochromator motors to continuously scan the energy while measuring the fluorescence from the sample as the energy changes. The data acquisition during the scan is triggered by the actual energy value which is monitored throughout the scan at 1 MHz rate. The energy scan routine is fully automated and minimizes the radiation damage on the sample during the measurements. The scan itself is as short as one second making the overall procedure a factor of five faster than a conventional step scan. * Ursby T. et al. "BioMAX - the first macromolecular crystallography beamline at MAX IV Laboratory." Journal of Synchrotron Radiation 27, 1415 - 1729, (2020).
	Poster THPDP054 [4.700 MB]
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)