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Title: Very high brightness and power LCLS-II hard X-ray pulses

Abstract

The feasibility of generating X-ray pulses in the 4–8 keV fundamental photon energy range with 0.65 TW peak power, 15 fs pulse duration and 9 × 10 -5 bandwidth using the LCLS-II copper linac and hard X-ray (HXR) undulator is shown. Moreover, third-harmonic pulses with 8–12 GW peak power and narrow bandwidth are also generated. High-power and small-bandwidth X-rays are obtained using two electron bunches separated by about 1 ns, one to generate a high-power seed signal, the other to amplify it through the process of the HXR undulator tapering. The bunch delay is compensated by delaying the seed pulse with a four-crystal monochromator. The high-power seed leads to higher output power and better spectral properties, with more than 94% of the X-ray power within the near-transform-limited bandwidth. Some of the experiments made possible by X-ray pulses with these characteristics are reported on, such as single-particle imaging and high-field physics.

Authors:
ORCiD logo [1];  [2];  [2];  [2];  [2]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of California, Los Angeles, CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1529378
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Synchrotron Radiation (Online)
Additional Journal Information:
Journal Name: Journal of Synchrotron Radiation (Online); Journal Volume: 26; Journal Issue: 3; Journal ID: ISSN 1600-5775
Publisher:
International Union of Crystallography
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; FEL; fresh-bunch FEL; terawatt FEL

Citation Formats

Halavanau, Aliaksei, Decker, Franz-Josef, Emma, Claudio, Sheppard, Jackson, and Pellegrini, Claudio. Very high brightness and power LCLS-II hard X-ray pulses. United States: N. p., 2019. Web. doi:10.1107/s1600577519002492.
Halavanau, Aliaksei, Decker, Franz-Josef, Emma, Claudio, Sheppard, Jackson, & Pellegrini, Claudio. Very high brightness and power LCLS-II hard X-ray pulses. United States. doi:10.1107/s1600577519002492.
Halavanau, Aliaksei, Decker, Franz-Josef, Emma, Claudio, Sheppard, Jackson, and Pellegrini, Claudio. Mon . "Very high brightness and power LCLS-II hard X-ray pulses". United States. doi:10.1107/s1600577519002492. https://www.osti.gov/servlets/purl/1529378.
@article{osti_1529378,
title = {Very high brightness and power LCLS-II hard X-ray pulses},
author = {Halavanau, Aliaksei and Decker, Franz-Josef and Emma, Claudio and Sheppard, Jackson and Pellegrini, Claudio},
abstractNote = {The feasibility of generating X-ray pulses in the 4–8 keV fundamental photon energy range with 0.65 TW peak power, 15 fs pulse duration and 9 × 10-5 bandwidth using the LCLS-II copper linac and hard X-ray (HXR) undulator is shown. Moreover, third-harmonic pulses with 8–12 GW peak power and narrow bandwidth are also generated. High-power and small-bandwidth X-rays are obtained using two electron bunches separated by about 1 ns, one to generate a high-power seed signal, the other to amplify it through the process of the HXR undulator tapering. The bunch delay is compensated by delaying the seed pulse with a four-crystal monochromator. The high-power seed leads to higher output power and better spectral properties, with more than 94% of the X-ray power within the near-transform-limited bandwidth. Some of the experiments made possible by X-ray pulses with these characteristics are reported on, such as single-particle imaging and high-field physics.},
doi = {10.1107/s1600577519002492},
journal = {Journal of Synchrotron Radiation (Online)},
number = 3,
volume = 26,
place = {United States},
year = {2019},
month = {2}
}

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