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Grychtol P, Rivas DE, Baumann TM, Boll R, De Fanis A, Erk B, Ilchen M, Liu J, Mazza T, Montaño J, Müller J, Music V, Ovcharenko Y, Rennhack N, Rouzé A, Schmidt P, Schulz S, Usenko S, Wagner R, Ziołkowski P, Schlarb H, Grünert J, Kabachnik N, Meyer M. Timing and X-ray pulse characterization at the Small Quantum Systems instrument of the European X-ray Free Electron Laser. OPTICS EXPRESS 2021; 29:37429-37442. [PMID: 34808814 DOI: 10.1364/oe.440718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 10/06/2021] [Indexed: 06/13/2023]
Abstract
This contribution presents the initial characterization of the pump-probe performance at the Small Quantum Systems (SQS) instrument of the European X-ray Free Electron Laser. It is demonstrated that time-resolved experiments can be performed by measuring the X-ray/optical cross-correlation exploiting the laser-assisted Auger decay in neon. Applying time-of-arrival corrections based on simultaneous spectral encoding measurements allow us to significantly improve the temporal resolution of this experiment. These results pave the way for ultrafast pump-probe investigations of gaseous media at the SQS instrument combining intense and tunable soft X-rays with versatile optical laser capabilities.
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Femtosecond Optical Laser System with Spatiotemporal Stabilization for Pump-Probe Experiments at SACLA. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10217934] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We constructed a synchronized femtosecond optical laser system with spatiotemporal stabilization for pump-probe experiments at SPring-8 Angstrom Compact Free Electron Laser (SACLA). Stabilization of output power and pointing has been achieved with a small fluctuation level of a few percent by controlling conditions of temperature and air-flow in the optical paths. A feedback system using a balanced optical-microwave phase detector (BOMPD) has been successfully realized to reduce jitter down to 50 fs. We demonstrated the temporal stability with a time-resolved X-ray diffraction measurement and observed the coherent phonon oscillation of the photo-excited Bi without the post-processing using the timing monitor.
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Kubota Y, Suzuki M, Katayama T, Yamamoto K, Tono K, Inubushi Y, Seki T, Takanashi K, Wadati H, Yabashi M. Polarization control with an X-ray phase retarder for high-time-resolution pump-probe experiments at SACLA. JOURNAL OF SYNCHROTRON RADIATION 2019; 26:1139-1143. [PMID: 31274437 PMCID: PMC6613128 DOI: 10.1107/s1600577519006222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Accepted: 05/02/2019] [Indexed: 06/09/2023]
Abstract
Control of the polarization of an X-ray free-electron laser (XFEL) has been performed using an X-ray phase retarder (XPR) in combination with an arrival timing diagnostic on BL3 of the SPring-8 Angstrom Compact free-electron LAser (SACLA). To combine with the timing diagnostic, a pink beam was incident on the XPR crystal and then monochromated in the vicinity of samples. A high degree of circular polarization of ∼97% was obtained experimentally at 11.567 keV, which agreed with calculations based on the dynamical theory of X-ray diffraction. This system enables pump-probe experiments to be operated using circular polarization with a time resolution of 40 fs to investigate ultrafast magnetic phenomena.
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Affiliation(s)
- Y. Kubota
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - M. Suzuki
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - T. Katayama
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - K. Yamamoto
- Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - K. Tono
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Y. Inubushi
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - T. Seki
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
- Center for Spintronics Research Network, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - K. Takanashi
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
- Center for Spintronics Research Network, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japan
| | - H. Wadati
- Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - M. Yabashi
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
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Owada S, Nakajima K, Togashi T, Katayama T, Yumoto H, Ohashi H, Yabashi M. Arrival timing diagnostics at a soft X-ray free-electron laser beamline of SACLA BL1. JOURNAL OF SYNCHROTRON RADIATION 2019; 26:887-890. [PMID: 31074453 PMCID: PMC6510193 DOI: 10.1107/s1600577519002315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 02/12/2019] [Indexed: 06/09/2023]
Abstract
An arrival timing monitor for the soft X-ray free-electron laser (XFEL) beamline of SACLA BL1 has been developed. A small portion of the soft XFEL pulse is branched using the wavefront-splitting method. The branched FEL pulse is one-dimensionally focused onto a GaAs wafer to induce a transient reflectivity change. The beam branching method enables the simultaneous operation of the arrival timing diagnostics and experiments. The temporal resolution evaluated from the imaging system is ∼22 fs in full width at half-maximum, which is sufficient considering the temporal durations of the soft XFEL and the optical laser pulses.
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Affiliation(s)
- Shigeki Owada
- Japan Synchrotron Radiation Research Institute, Sayo-cho, Sayo-gun 6795198, Japan
- RIKEN SPring-8 Center, Sayo-cho, Sayo-gun 6795148, Japan
| | - Kyo Nakajima
- Japan Synchrotron Radiation Research Institute, Sayo-cho, Sayo-gun 6795198, Japan
- RIKEN SPring-8 Center, Sayo-cho, Sayo-gun 6795148, Japan
| | - Tadashi Togashi
- Japan Synchrotron Radiation Research Institute, Sayo-cho, Sayo-gun 6795198, Japan
- RIKEN SPring-8 Center, Sayo-cho, Sayo-gun 6795148, Japan
| | - Tetsuo Katayama
- Japan Synchrotron Radiation Research Institute, Sayo-cho, Sayo-gun 6795198, Japan
- RIKEN SPring-8 Center, Sayo-cho, Sayo-gun 6795148, Japan
| | - Hirokatsu Yumoto
- Japan Synchrotron Radiation Research Institute, Sayo-cho, Sayo-gun 6795198, Japan
- RIKEN SPring-8 Center, Sayo-cho, Sayo-gun 6795148, Japan
| | - Haruhiko Ohashi
- Japan Synchrotron Radiation Research Institute, Sayo-cho, Sayo-gun 6795198, Japan
- RIKEN SPring-8 Center, Sayo-cho, Sayo-gun 6795148, Japan
| | - Makina Yabashi
- Japan Synchrotron Radiation Research Institute, Sayo-cho, Sayo-gun 6795198, Japan
- RIKEN SPring-8 Center, Sayo-cho, Sayo-gun 6795148, Japan
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Tono K, Hara T, Yabashi M, Tanaka H. Multiple-beamline operation of SACLA. JOURNAL OF SYNCHROTRON RADIATION 2019; 26:595-602. [PMID: 30855272 PMCID: PMC6412171 DOI: 10.1107/s1600577519001607] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 01/28/2019] [Indexed: 05/11/2023]
Abstract
The SPring-8 Ångstrom Compact free-electron LAser (SACLA) began parallel operation of three beamlines (BL1-3) in autumn 2017 to increase the user beam time of the X-ray free-electron laser. The success of the multiple-beamline operation is based on two technological achievements: (i) the fast switching operation of the SACLA main linear accelerator, which provides BL2 and BL3 with pulse-by-pulse electron beams, and (ii) the relocation and upgrade of the SPring-8 Compact SASE Source for BL1, for the generation of a soft X-ray free-electron laser. Moreover, the photon beamlines and experimental stations were upgraded to facilitate concurrent user experiments at the three beamlines and accommodate more advanced experiments.
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Affiliation(s)
- Kensuke Tono
- XFEL Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan
| | - Toru Hara
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan
| | - Makina Yabashi
- XFEL Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan
| | - Hitoshi Tanaka
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan
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Harries JR, Iwayama H, Kuma S, Iizawa M, Suzuki N, Azuma Y, Inoue I, Owada S, Togashi T, Tono K, Yabashi M, Shigemasa E. Superfluorescence, Free-Induction Decay, and Four-Wave Mixing: Propagation of Free-Electron Laser Pulses through a Dense Sample of Helium Ions. PHYSICAL REVIEW LETTERS 2018; 121:263201. [PMID: 30636148 DOI: 10.1103/physrevlett.121.263201] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Indexed: 06/09/2023]
Abstract
We report an experimental and numerical study of the propagation of free-electron laser pulses (wavelength 24.3 nm) through helium gas. Ionization and excitation populates the He^{+} 4p state. Strong, directional emission was observed at wavelengths of 469, 164, 30.4, and 25.6 nm. We interpret the emissions at 469 and 164 nm as 4p-3s-2p cascade superfluorescence, that at 30.4 nm as yoked superfluorescence on the 2p-1s transition, and that at 25.6 nm as free-induction decay of the 3p state.
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Affiliation(s)
| | - Hiroshi Iwayama
- UVSOR, IMS, Nishigo-Naka 38, Myodaiji, Okazaki, Aichi 444-8585, Japan
- SOKENDAI, Nishigo-Naka 38, Myodaiji, Okazaki, Aichi 444-8585, Japan
| | - Susumu Kuma
- Atomic, Molecular, and Optical Physics Laboratory, RIKEN, Saitama 351-0198, Japan
| | - Masatomi Iizawa
- Faculty of Science and Technology, Sophia University, Kioicho 7-1, Chiyoda, Tokyo 102-8554, Japan
| | - Norihiro Suzuki
- Faculty of Science and Technology, Sophia University, Kioicho 7-1, Chiyoda, Tokyo 102-8554, Japan
| | - Yoshiro Azuma
- Faculty of Science and Technology, Sophia University, Kioicho 7-1, Chiyoda, Tokyo 102-8554, Japan
| | - Ichiro Inoue
- RIKEN SPring-8 Centre, Kouto 1-1-1, Sayo, Hyogo, 679-5148, Japan
| | - Shigeki Owada
- Japan Synchrotron Radiation Research Institute, Kouto 1-1-1, Sayo, Hyogo 679-5198, Japan
| | - Tadashi Togashi
- Japan Synchrotron Radiation Research Institute, Kouto 1-1-1, Sayo, Hyogo 679-5198, Japan
| | - Kensuke Tono
- Japan Synchrotron Radiation Research Institute, Kouto 1-1-1, Sayo, Hyogo 679-5198, Japan
| | - Makina Yabashi
- RIKEN SPring-8 Centre, Kouto 1-1-1, Sayo, Hyogo, 679-5148, Japan
| | - Eiji Shigemasa
- UVSOR, IMS, Nishigo-Naka 38, Myodaiji, Okazaki, Aichi 444-8585, Japan
- SOKENDAI, Nishigo-Naka 38, Myodaiji, Okazaki, Aichi 444-8585, Japan
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