Can I read Cavity voltage phase modulation to reduce the high-luminosity Large Hadron Collider rf power requirements on EtoBox?
Cavity voltage phase modulation to reduce the high-luminosity Large Hadron Collider rf power requirements by Mastoridis, T. ;Baudrenghien, P. ;Molendijk, J. is a Engineering article available to read on EtoBox.
What is Cavity voltage phase modulation to reduce the high-luminosity Large Hadron Collider rf power requirements about?
The Large Hadron Collider (LHC) radio frequency (rf) and low-level rf (LLRF) systems are currently configured for constant rf voltage to minimize transient beam loading effects. The present scheme cannot be extended beyond nominal LHC beam current (0.55 A dc) and cannot be sustained for the highluminosity (HL-LHC) beam current (1.1 A dc), since the demanded power would exceed the peak klystron power. A new scheme has therefore been proposed: for beam currents above nominal (and possibly earlier), the voltage reference will reproduce the modulation driven by the beam (transient beam loading), but the strong rf feedback and one-turn delay feedback will still be active for loop and beam stability. To achieve this, the voltage reference will be adapted for each bunch. This paper includes a theoretical derivation of the optimal cavity modulation, introduces the implemented algorithm, summarizes simulation runs that tested the algorithm performance, and presents results from a short LHC physics fill with the proposed implementation.
Who reads Cavity voltage phase modulation to reduce the high-luminosity Large Hadron Collider rf power requirements?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Mastoridis, T. ;Baudrenghien, P. ;Molendijk, J.
- Publisher
- American Physical Society (APS)
- Published
- 2017
- Language
- EN
- Field
- Engineering (Physical Sciences)