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Title: FPGA-based Klystron linearization implementations in scope of ILC

We report the development and implementation of four FPGA-based predistortion-type klystron linearization algorithms. Klystron linearization is essential for the realization of ILC, since it is required to operate the klystrons 7% in power below their saturation. The work presented was performed in international collaborations at the Fermi National Accelerator Laboratory (FNAL), USA and the Deutsches Elektronen Synchrotron (DESY), Germany. With the newly developed algorithms, the generation of correction factors on the FPGA was improved compared to past algorithms, avoiding quantization and decreasing memory requirements. At FNAL, three algorithms were tested at the Advanced Superconducting Test Accelerator (ASTA), demonstrating a successful implementation for one algorithm and a proof of principle for two algorithms. Furthermore, the functionality of the algorithm implemented at DESY was demonstrated successfully in a simulation.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [3] ;  [3] ;  [4] ;  [4] ;  [5]
  1. The Graduate Univ. of Advanced Studies, Hayama (Japan)
  2. The Graduate Univ. of Advanced Studies/High Energy Accelerator Research Organization, Tsukuba (Japan)
  3. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  4. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  5. Lodz Univ. of Technology, Lodz (Poland)
Publication Date:
OSTI Identifier:
1235037
Report Number(s):
FERMILAB-PUB--15-317-AD
Journal ID: ISSN 0168-9002
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 780; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS accelerators; ILC; Klystron linearization; FPGA; Klystron-cavity simulator