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Title: Hard X-ray self-seeding commissioning at PAL-XFEL

Abstract

A wake monochromator based on a large-area diamond single crystal for hard X-ray self-seeding has been successfully installed and commissioned in the hard X-ray free-electron laser (FEL) at the Pohang Accelerator Laboratory with international collaboration. For this commissioning, the self-seeding was demonstrated with a low bunch charge (40 pC) and the nominal bunch charge (180 pC) of self-amplified spontaneous emission (SASE) operation. The FEL pulse lengths were estimated as 7 fs and 29.5 fs, respectively. In both cases, the average spectral brightness increased by more than three times compared with the SASE mode. The self-seeding experiment was demonstrated for the first time using a crystal with a thickness of 30 µm, and a narrow bandwidth of 0.22 eV (full width at half-maximum) was obtained at 8.3 keV, which confirmed the functionality of a crystal with such a small thickness. In the nominal bunch-charge self-seeding experiment, the histogram of the intensity integrated over a 1 eV bandwidth showed a well defined Gaussian profile, which is evidence of the saturated FEL and a minimal electron-energy jitter (~1.2 × 10–4) effect. Here, the corresponding low photon-energy jitter (~2.4 × 10–4) of the SASE FEL pulse, which is two times lower than the Piercemore » parameter, enabled the seeding power to be maximized by maintaining the spectral overlap between SASE FEL gain and the monochromator.« less

Authors:
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+ Show Author Affiliations
  1. Pohang Accelerator Lab., Gyeongbuk (Republic of Korea)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Technological Institute for Superhard and Novel Carbon Materials, Moscow (Russian Federation)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Research Foundation of Korea (NRF); USDOE
OSTI Identifier:
1576740
Grant/Contract Number:  
AC02-06CH11357
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: 4; Journal ID: ISSN 1600-5775
Publisher:
International Union of Crystallography
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; diamond monochromators; electron-energy jitter; free-electron lasers; hard X-rays; self-amplified spontaneous emission; self-seeding

Citation Formats

Min, Chang -Ki, Nam, Inhyuk, Yang, Haeryong, Kim, Gyujin, Shim, Chi Hyun, Ko, Jun Ho, Cho, Myung -Hoon, Heo, Hoon, Oh, Bonggi, Suh, Young Jin, Kim, Min Jae, Na, Donghyun, Kim, Changbum, Kim, Yongsam, Chun, Sae Hwan, Lee, Jae Hyuk, Kim, Jangwoo, Kim, Sunam, Eom, Intae, Kim, Seung Nam, Koo, Tae -Yeong, Rah, Seungyu, Shvyd'ko, Yuri, Shu, Deming, Kim, Kwang -Je, Terentyev, Sergey, Blank, Vladimir, and Kang, Heung -Sik. Hard X-ray self-seeding commissioning at PAL-XFEL. United States: N. p., 2019. Web. doi:10.1107/S1600577519005460.
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Min, Chang -Ki, Nam, Inhyuk, Yang, Haeryong, Kim, Gyujin, Shim, Chi Hyun, Ko, Jun Ho, Cho, Myung -Hoon, Heo, Hoon, Oh, Bonggi, Suh, Young Jin, Kim, Min Jae, Na, Donghyun, Kim, Changbum, Kim, Yongsam, Chun, Sae Hwan, Lee, Jae Hyuk, Kim, Jangwoo, Kim, Sunam, Eom, Intae, Kim, Seung Nam, Koo, Tae -Yeong, Rah, Seungyu, Shvyd'ko, Yuri, Shu, Deming, Kim, Kwang -Je, Terentyev, Sergey, Blank, Vladimir, & Kang, Heung -Sik. Hard X-ray self-seeding commissioning at PAL-XFEL. United States. https://doi.org/10.1107/S1600577519005460
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Min, Chang -Ki, Nam, Inhyuk, Yang, Haeryong, Kim, Gyujin, Shim, Chi Hyun, Ko, Jun Ho, Cho, Myung -Hoon, Heo, Hoon, Oh, Bonggi, Suh, Young Jin, Kim, Min Jae, Na, Donghyun, Kim, Changbum, Kim, Yongsam, Chun, Sae Hwan, Lee, Jae Hyuk, Kim, Jangwoo, Kim, Sunam, Eom, Intae, Kim, Seung Nam, Koo, Tae -Yeong, Rah, Seungyu, Shvyd'ko, Yuri, Shu, Deming, Kim, Kwang -Je, Terentyev, Sergey, Blank, Vladimir, and Kang, Heung -Sik. Tue . "Hard X-ray self-seeding commissioning at PAL-XFEL". United States. https://doi.org/10.1107/S1600577519005460. https://www.osti.gov/servlets/purl/1576740.
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@article{osti_1576740,
title = {Hard X-ray self-seeding commissioning at PAL-XFEL},
author = {Min, Chang -Ki and Nam, Inhyuk and Yang, Haeryong and Kim, Gyujin and Shim, Chi Hyun and Ko, Jun Ho and Cho, Myung -Hoon and Heo, Hoon and Oh, Bonggi and Suh, Young Jin and Kim, Min Jae and Na, Donghyun and Kim, Changbum and Kim, Yongsam and Chun, Sae Hwan and Lee, Jae Hyuk and Kim, Jangwoo and Kim, Sunam and Eom, Intae and Kim, Seung Nam and Koo, Tae -Yeong and Rah, Seungyu and Shvyd'ko, Yuri and Shu, Deming and Kim, Kwang -Je and Terentyev, Sergey and Blank, Vladimir and Kang, Heung -Sik},
abstractNote = {A wake monochromator based on a large-area diamond single crystal for hard X-ray self-seeding has been successfully installed and commissioned in the hard X-ray free-electron laser (FEL) at the Pohang Accelerator Laboratory with international collaboration. For this commissioning, the self-seeding was demonstrated with a low bunch charge (40 pC) and the nominal bunch charge (180 pC) of self-amplified spontaneous emission (SASE) operation. The FEL pulse lengths were estimated as 7 fs and 29.5 fs, respectively. In both cases, the average spectral brightness increased by more than three times compared with the SASE mode. The self-seeding experiment was demonstrated for the first time using a crystal with a thickness of 30 µm, and a narrow bandwidth of 0.22 eV (full width at half-maximum) was obtained at 8.3 keV, which confirmed the functionality of a crystal with such a small thickness. In the nominal bunch-charge self-seeding experiment, the histogram of the intensity integrated over a 1 eV bandwidth showed a well defined Gaussian profile, which is evidence of the saturated FEL and a minimal electron-energy jitter (~1.2 × 10–4) effect. Here, the corresponding low photon-energy jitter (~2.4 × 10–4) of the SASE FEL pulse, which is two times lower than the Pierce parameter, enabled the seeding power to be maximized by maintaining the spectral overlap between SASE FEL gain and the monochromator.},
doi = {10.1107/S1600577519005460},
journal = {Journal of Synchrotron Radiation (Online)},
number = 4,
volume = 26,
place = {United States},
year = {Tue Jun 18 00:00:00 EDT 2019},
month = {Tue Jun 18 00:00:00 EDT 2019}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1107/S1600577519005460
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Works referenced in this record:

Demonstration of self-seeding in a hard-X-ray free-electron laser
journal, August 2012

Femtosecond X-Ray Pulse Characterization in Free-Electron Lasers Using a Cross-Correlation Technique
journal, December 2012

A novel self-seeding scheme for hard X-ray FELs
journal, September 2011

Single Shot Spatial and Temporal Coherence Properties of the SLAC Linac Coherent Light Source in the Hard X-Ray Regime
journal, January 2012

Review of x-ray free-electron laser theory
journal, March 2007

Hard X-ray free-electron laser with femtosecond-scale timing jitter
journal, October 2017

X-ray FEL with a meV bandwidth
journal, December 2001

  • Saldin, E. L.; Schneidmiller, E. A.; Shvyd'ko, Yu. V.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 475, Issue 1-3
  • DOI: 10.1016/S0168-9002(01)01539-X

Spatiotemporal response of crystals in x-ray Bragg diffraction
journal, October 2012

SIMPLEX : simulator and postprocessor for free-electron laser experiments
journal, August 2015

Maximizing spectral flux from self-seeding hard x-ray free electron lasers
journal, December 2013

A single-shot transmissive spectrometer for hard x-ray free electron lasers
journal, July 2012

  • Zhu, Diling; Cammarata, Marco; Feldkamp, Jan M.
  • Applied Physics Letters, Vol. 101, Issue 3
  • DOI: 10.1063/1.4736725

Single Shot Spatial and Temporal Coherence Properties of the SLAC Linac Coherent Light Source in the Hard X-Ray Regime
text, January 2012

  • Gutt, C.; Wochner, P.; Fischer, B.
  • Deutsches Elektronen-Synchrotron, DESY, Hamburg
  • DOI: 10.3204/phppubdb-21999

X-ray FEL with a meV bandwidth
conference, January 2001

  • Saldin, E. L.
  • 19th Advanced ICFA beam dynamics workshop on physics of, and science with, the x-ray free-electron laser, AIP Conference Proceedings
  • DOI: 10.1063/1.1401570

Spatiotemporal Response of Crystals in X-ray Bragg Diffraction
text, January 2012

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