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@InProceedings{enomoto:icalepcs2019-wecpr05,
author = {Y. Enomoto and K. Furukawa and T. Natsui and H.S. Saotome and M. Satoh},
title = {{Pulsed Magnet Control System Using COTS PXIe Devices and LabVIEW}},
booktitle = {Proc. ICALEPCS'19},
pages = {946--949},
paper = {WECPR05},
language = {english},
keywords = {controls, power-supply, linac, software, operation},
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-WECPR05},
url = {https://jacow.org/icalepcs2019/papers/wecpr05.pdf},
note = {https://doi.org/10.18429/JACoW-ICALEPCS2019-WECPR05},
abstract = {About one hundred channels of pulsed magnet power supply control system were installed in 2017 in KEK electron positron LINAC to realize pulse-to-pulse control of output current every 20 ms. The control system of a group of eight channels totally consists of commercially available devices, namely a PC (Windows 8.1), a PXIe crate and several PXIe boards such as ADC, DAC communication and timing. The software is written with LabVIEW. EPICS channel access protocol is used to communicate with OPI over standard Ethernet network. Depending on the destination of the beam, there are ten beam modes. The software is able to keep parameters for each mode independently, which makes it possible for us to operate one LINAC as if it were ten virtual LINACs. Even Software feedback to compensate small drift of output current is available for each mode independently. During two years of operation, there were no significant problem. Although the Windows is not a real-time OS, dropping rate of the trigger coming every 20 ms is less than a ppm. Rebooting of the PC or software is necessary only a few times in a year.},
}