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@InProceedings{loehnert:icalepcs2019-wepha091,
author = {T. Löhnert and J.R. Holt and A.J. Long},
title = {{Generalising the High-Level Geometry System for Reflectometry Instruments at ISIS}},
booktitle = {Proc. ICALEPCS'19},
pages = {1300--1303},
paper = {WEPHA091},
language = {english},
keywords = {controls, neutron, experiment, EPICS, target},
venue = {New York, NY, USA},
series = {International Conference on Accelerator and Large Experimental Physics Control Systems},
number = {17},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2020},
issn = {2226-0358},
isbn = {978-3-95450-209-7},
doi = {10.18429/JACoW-ICALEPCS2019-WEPHA091},
url = {https://jacow.org/icalepcs2019/papers/wepha091.pdf},
note = {https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA091},
abstract = {At the ISIS Pulsed Neutron and Muon Source, we in the Experiment Control Group are currently upgrading from the LabVIEW*-based SECI instrument control system to the new IBEX control system** based on EPICS***. One class of instrument we have yet to migrate to the new system is reflectometers. These instruments require equipment to track the path of the neutron beam to high levels of precision over various experimental configurations, which results in a unique set of control system requirements. Since August 2018, we have been implementing a higher level geometry layer responsible for linking beamline components together and preserving experimental parameters such as the incident beam angle across different configurations. This layer is written as a Python server running on the instrument, which interfaces to the Channel Access protocol used by EPICS. This talk will provide an overview of the system architecture, specifically how it supports the design goal of making the system easy to extend and reconfigure while preserving the functionality of the existing solution, as well as an outlook on future plans for a more sophisticated motion control system.},
}