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@InProceedings{sato:icalepcs2019-wepha136,
author = {K.C. Sato and N. Kamikubota and T. Kimura and S. Yamada and N. Yamamoto and S.Y. Yoshida},
title = {{The Software-Based Machine Protection System Using EPICS in J-PARC MR}},
booktitle = {Proc. ICALEPCS'19},
pages = {1418--1420},
paper = {WEPHA136},
language = {english},
keywords = {EPICS, operation, controls, GUI, status},
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-WEPHA136},
url = {https://jacow.org/icalepcs2019/papers/wepha136.pdf},
note = {https://doi.org/10.18429/JACoW-ICALEPCS2019-WEPHA136},
abstract = {In J-PARC, a Machine Protection System (MPS) stops accelerator beam operation automatically when an interlock signal comes. Normal MPS accepts interlock signals by hard-wire, but a software-based MPS, called "Soft-MPS", uses only EPICS PVs without wiring. A PLC controller running Linux was introduced to watch at some EPICS PVs over Ethernet, and outputs Soft-MPS signals to the MPS unit after logical calculates. There are 2 reasons of using Soft-MPS. (1) To install interlock signals rapidly. This type of Soft-MPS will switch to hard-wire later. (2) To use non-hardware parameters: for example, machine operation modes, beam bunch information, etc. From the first Soft-MPS setup in 2018 spring, 9 Soft-MPS signals are currently used. As more Soft-MPS signals are expected in the future, we need to discuss the policy.},
}