ICALEPCS2021 - List of Authors (Enquist, H.)

Paper	Title	Page
FRBR04	Continuous Scans with Position Based Hardware Triggers	1069
	H. Enquist, A. Bartalesi, B. Bertrand, J. Forsberg, Á. Freitas, V. Hardion, M. Lindberg, C. Takahashi MAX IV Laboratory, Lund University, Lund, Sweden
	At beamline end-stations, data taking that relies on traditional step scanning, in which motors are repeatedly started and stopped, leads to inefficient usage of the x-ray source. This also increases the risk of sample radiation damage. We have developed a system where scans are performed while continuously moving the motors. To ensure stable repeatable measurements, the detector triggers are generated, in hardware, from the motor encoder positions. Before the scan starts, a list of positions is generated and as the scan progresses a trigger is produced as each successive position in the list is reached. The encoder signals from the motors are connected both to the IcePAP motion controller for closed loop operation, and a PandABox which is used as the trigger source. Control is from Tango and Sardana with a TriggerGate controller that calculates the motor positions and configures the PandABox. The scanned motor can be either a single motor, for example a sample positioner, or a combined motion like a monochromator. When combined motions are required, these make use of the parametric trajectory mode of the IcePAP. This enables continuous scans of coupled axes with non-linear paths.
	Slides FRBR04 [1.685 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-FRBR04
About •	Received ※ 10 October 2021 Revised ※ 14 October 2021 Accepted ※ 20 November 2021 Issue date ※ 13 December 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Continuous Scans with Position Based Hardware Triggers

1069

H. Enquist, A. Bartalesi, B. Bertrand, J. Forsberg, Á. Freitas, V. Hardion, M. Lindberg, C. Takahashi
MAX IV Laboratory, Lund University, Lund, Sweden

At beamline end-stations, data taking that relies on traditional step scanning, in which motors are repeatedly started and stopped, leads to inefficient usage of the x-ray source. This also increases the risk of sample radiation damage. We have developed a system where scans are performed while continuously moving the motors. To ensure stable repeatable measurements, the detector triggers are generated, in hardware, from the motor encoder positions. Before the scan starts, a list of positions is generated and as the scan progresses a trigger is produced as each successive position in the list is reached. The encoder signals from the motors are connected both to the IcePAP motion controller for closed loop operation, and a PandABox which is used as the trigger source. Control is from Tango and Sardana with a TriggerGate controller that calculates the motor positions and configures the PandABox. The scanned motor can be either a single motor, for example a sample positioner, or a combined motion like a monochromator. When combined motions are required, these make use of the parametric trajectory mode of the IcePAP. This enables continuous scans of coupled axes with non-linear paths.

Slides FRBR04 [1.685 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ICALEPCS2021-FRBR04

About •

Received ※ 10 October 2021 Revised ※ 14 October 2021 Accepted ※ 20 November 2021 Issue date ※ 13 December 2021

Cite •

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