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Title: Spectrotemporal control of soft x-ray laser pulses

Journal Article · · Physical Review Accelerators and Beams
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [1];  [1];  [3]; ORCiD logo [1];  [4]; ORCiD logo [5]; ORCiD logo [6];  [1]; ORCiD logo [7];  [1];  [1];  [1];  [1]; ORCiD logo [3]
  1. Elettra-Sincrotrone Trieste (Italy)
  2. Univ. degli Studi di Trieste (Italy)
  3. Elettra-Sincrotrone Trieste (Italy); Univ. of Nova Gorica (Slovenia)
  4. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  5. Elettra-Sincrotrone Trieste (Italy); National Inst. of Nuclear Physics (INFN), Rome (Italy)
  6. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  7. Univ. Lille (France)

We exploit echo-enabled harmonic generation (EEHG) to produce fully coherent free-electron laser (FEL) pulses at soft-x-ray wavelengths and shape their spectrotemporal content. In an EEHG FEL, the longitudinal phase space of the relativistic electron beam that amplifies light is precisely tailored using two external seed lasers and two magnetic chicanes. We show that the spectrotemporal properties of the emitted radiation can be controlled by tuning the bandwidth, linear frequency chirp, and intensity of one of the seed lasers. The experimental data are supported by analytical and numerical models. Our results open a pathway toward coherent control of quantum processes at short wavelengths in the fields of applied physics, chemistry and biology, where manipulating the radiation spectrum is essential. The ability to precisely control the spectrotemporal content of intense, short-wavelength FEL pulses and the low sensitivity of the radiation to electron-beam imperfections make the technique an ideal candidate for use in chirped-pulse amplification schemes.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515; 2017-SLAC-100382
OSTI ID:
1633009
Alternate ID(s):
OSTI ID: 1637703
Journal Information:
Physical Review Accelerators and Beams, Vol. 23, Issue 6; ISSN 2469-9888
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

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