LINAC2014 - List of Authors (Varghese, P.)

Paper

Title

Page

Development of FPGA-based Predistortion-type Linearization Algorithms for Klystrons within Digital LLRF Control Systems for ILC-like Electron Accelerators

1162

M. Omet
Sokendai, Ibaraki, Japan
B. Chase, P. Varghese
Fermilab, Batavia, Illinois, USA
T. Matsumoto, S. Michizono, T. Miura, F. Qiu
KEK, Ibaraki, Japan

Two different kinds of predistortion-type linearization algorithms have been implemented and compared on an FPGA within the digital LLRF control system the Advanced Superconducting Test Facility (ASTA) at the Fermi National Accelerator Laboratory (FNAL). The algorithms are based on 2nd order polynomial functions and lookup tables with interpolation by which complex correction factors are obtained. The algorithms were tested in an actual setup including a 5 MW klystron and a superconducting 9-cell TESLA-type cavity at ASTA. By this a proof of concept was demonstrated.

Poster THPP130 [2.411 MB]

Paper	Title	Page
THPP130	Development of FPGA-based Predistortion-type Linearization Algorithms for Klystrons within Digital LLRF Control Systems for ILC-like Electron Accelerators	1162
	M. Omet Sokendai, Ibaraki, Japan B. Chase, P. Varghese Fermilab, Batavia, Illinois, USA T. Matsumoto, S. Michizono, T. Miura, F. Qiu KEK, Ibaraki, Japan
	Two different kinds of predistortion-type linearization algorithms have been implemented and compared on an FPGA within the digital LLRF control system the Advanced Superconducting Test Facility (ASTA) at the Fermi National Accelerator Laboratory (FNAL). The algorithms are based on 2nd order polynomial functions and lookup tables with interpolation by which complex correction factors are obtained. The algorithms were tested in an actual setup including a 5 MW klystron and a superconducting 9-cell TESLA-type cavity at ASTA. By this a proof of concept was demonstrated.
	Poster THPP130 [2.411 MB]