| Title |
The LCLS-II LLRF System |
| Authors |
- C. Hovater, R. Bachimanchi
JLab, Newport News, Virginia, USA
- S. Babel, B. Hong, D. Van Winkle
SLAC, Menlo Park, California, USA
- B.E. Chase, E. Cullerton, P. Varghese
Fermilab, Batavia, Illinois, USA
- L.R. Doolittle, G. Huang, A. Ratti, C. Serrano
LBNL, Berkeley, California, USA
|
| Abstract |
The SLAC National Accelerator Laboratory is planning an upgrade (LCLS-II) to the Linear Coherent Light Source with a 4 GeV CW superconducting (SCRF) linac. The SCRF linac consists of 35 ILC style cryomodules (eight cavities each) for a total of 280 cavities. Expected cavity gradients are 16 MV/m with a loaded QL of ~ 4x10⁷. The RF system will have 3.8 kW solid state amplifiers driving single cavities. To ensure optimum field stability a single source single cavity control system has been chosen. It consists of a precision four channel cavity receiver and RF stations (Forward, Reflected and Drive signals). In order to regulate the resonant frequency variations of the cavities due to He pressure, the tuning of each cavity is controlled by a Piezo actuator and a slow stepper motor. In addition the system (LLRF-amplifier-cavity) is being modeled and cavity microphonic testing has started. This paper describes the LLRF system under consideration, including recent modeling and cavity tests.
|
| Funding |
This work was supported by the LCLS-II Project and the U.S. Department of Energy, Contract DE-AC02-76SF00515. |
| Paper |
download MOPWI021.PDF [0.828 MB / 3 pages] |
| Export |
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※ EndNote |
| Conference |
IPAC2015, Richmond, VA, USA |
| Series |
International Particle Accelerator Conference (6th) |
| Proceedings |
Link to full IPAC2015 Proccedings |
| Session |
Monday Posters (Wilson) |
| Date |
04-May-15 16:00–18:00 |
| Main Classification |
6: Beam Instrumentation, Controls, Feedback, and Operational Aspects |
| Sub Classification |
T27 - Low Level RF |
| Keywords |
cavity, controls, LLRF, cryomodule, linac |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Stuart Henderson (ANL, Argonne, IL, USA); Evelyn Akers (Jlab, Newport News, VA, USA); Todd Satogata (JLab, Newport News, VA, USA); Volker R.W. Schaa (GSI, Darmstadt, Germany) |
| ISBN |
978-3-95450-168-7 |
| Published |
June 2015 |
| Copyright |
|
