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| TUPLR009 |
An Iterative Learning Feedforward Controller for the TRIUMF e-linac |
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- M.P. Laverty, K. Fong
TRIUMF, Vancouver, Canada
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In the TRIUMF e-linac design, beam stability to within 0.1% within 10 μs in pulse mode is a design requirement. Traditional feedback control systems cannot respond within this time frame, so some form of feedforward control is needed. Even conventional feedforward may not be sufficient due to differences between the required feedforward signal and the actual beam-loading current. For this reason, an adaptive feedforward system using an iterative learning controller was developed for the e-linac LLRF. It can anticipate repetitive beam disturbance patterns by learning from previous iterations. The design and implementation of such a control algorithm is outlined, some simulation results are presented, and some preliminary test results with an actual cavity are illustrated.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-LINAC2016-TUPLR009
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