Physical Review Special Topics. Accelerators and Beams (Nov 2014)

Self-amplified spontaneous emission free electron laser devices and nonideal electron beam transport

  • L. L. Lazzarino,
  • E. Di Palma,
  • M. P. Anania,
  • M. Artioli,
  • A. Bacci,
  • M. Bellaveglia,
  • E. Chiadroni,
  • A. Cianchi,
  • F. Ciocci,
  • G. Dattoli,
  • D. Di Giovenale,
  • G. Di Pirro,
  • M. Ferrario,
  • G. Gatti,
  • L. Giannessi,
  • A. Mostacci,
  • P. Musumeci,
  • A. Petralia,
  • V. Petrillo,
  • R. Pompili,
  • J. V. Rau,
  • A. R. Rossi,
  • E. Sabia,
  • C. Vaccarezza,
  • F. Villa

DOI
https://doi.org/10.1103/PhysRevSTAB.17.110706
Journal volume & issue
Vol. 17, no. 11
p. 110706

Abstract

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We have developed, at the SPARC test facility, a procedure for a real time self-amplified spontaneous emission free electron laser (FEL) device performance control. We describe an actual FEL, including electron and optical beam transport, through a set of analytical formulas, allowing a fast and reliable on-line “simulation” of the experiment. The system is designed in such a way that the characteristics of the transport elements and the laser intensity are measured and adjusted, via a real time computation, during the experimental run, to obtain an on-line feedback of the laser performances. The detail of the procedure and the relevant experimental results are discussed.