| Title |
Single LLRF for Multi-Harmonic Buncher |
| Authors |
- N.R. Usher, D.M. Alt, J.F. Brandon, D.G. Morris, S. Zhao
FRIB, East Lansing, Michigan, USA
- D.M. Alt
NSCL, East Lansing, Michigan, USA
|
| Abstract |
In this paper, a unique low level radio frequency (LLRF) controller designed for a multi-harmonic buncher (MHB) is presented. Different than conventional designs, the single LLRF output contains three RF frequencies (f1, f2 = 2*f1, f3 = 3*f1) and is fed to a wide band amplifier driving the MHB. The challenge is while driving f1, due to the non-linearity of the amplifier, the f2 and f3 terms will also be generated and will couple into the control of these two modes. Hence an active cancellation algorithm is used to suppress the nonlinear effect of the amplifier. It is demonstrated in a test that the designed LLRF is able to control the amplitude and phase of the three modes in-dependently.
|
| Funding |
Work supported by Michigan State University, National Science Foundation: NSF Award Number PHY-1102511. |
| Paper |
download THPRC011.PDF [0.408 MB / 3 pages] |
| Poster |
download THPRC011_POSTER.PDF [1.944 MB] |
| Export |
download ※ BibTeX
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※ EndNote |
| Conference |
LINAC2016, East Lansing, MI, USA |
| Series |
Linear Accelerator Conference (28th) |
| Proceedings |
Link to full LINAC2016 Proccedings |
| Session |
Poster Session |
| Date |
29-Sep-16 16:00–17:00 |
| Main Classification |
3 Technology |
| Sub Classification |
3D Low Level RF |
| Keywords |
controls, LLRF, pick-up, experiment, radio-frequency |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Yoshishige Yamazaki (FRIB/MSU, East Lansing, MI, USA); Alberto Facco (FRIB/MSU, East Lansing, MI, USA); Amy McCausey (FRIB/MSU, East Lansing, MI, USA); Volker RW Schaa (GSI, Darmstadt, Germany) |
| ISBN |
978-3-95450-169-4 |
| Published |
May 2017 |
| Copyright |
|
