High-Precision Time Delay Control with Continuous Phase Shifter for Pump-Probe Experiments Using Synchrotron Radiation Pulses

Journal Article · Wed Jun 23 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3463375· OSTI ID:21410369

Tanaka, Yoshihito ^[1]; Ohshima, Takashi ^[2]; Fukuyama, Yoshimitsu; Yasuda, Nobuhiro; Kim, Jungeun; Osawa, Hitoshi; Kimura, Shigeru ^[2]; Togashi, Tadashi; Hara, Toru ^[3]; Kamioka, Hayato ^[2]; Moritomo, Yutaka ^[2]; Tanaka, Hitoshi ^[4]; Takata, Masaki ^[1]; Sengoku, Hidetoshi; Nonoshita, Eiji ^[5]

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1. RIKEN SPring-8 Center, Harima Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148 (Japan)
2. Japan Science and Technology Agency, CREST, 5 Sanban-cho, Chiyoda-ku, Tokyo 102-0075 (Japan)
3. JASRI/SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198 (Japan)
4. Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai, Tsukuba, Ibaraki 305-8571 (Japan)
5. Candox Systems Inc., 15-21, Oshiage-cho, Gyoda, Saitama 361-0045 (Japan)

Brilliant pulsed x-ray synchrotron radiation (SR) is useful for pump-probe experiment such as time-resolved x-ray diffraction, x-ray absorption fine structure, and x-ray spectroscopy. For laser pump-SR x-ray probe experiments, short pulsed lasers are generally synchronized to the SR master oscillator controlling the voltage for acceleration of electron bunches in an accelerator, and the interval between the laser and the SR pulses is changed around the time scale of target phenomenon. Ideal delay control produces any time delay as keeping the time-precision and pointing-stability of optical pulses at a sample position. We constructed the time delay control module using a continuous phase shifter of radio frequency signal and a frequency divider, which can produce the delayed trigger pulses to the laser without degradation of the time precision and the pointing stability. A picoseconds time-resolved x-ray diffraction experiment was demonstrated at SPring-8 storage ring for fast lattice response by femtosecond pulsed laser irradiation, and suggested the possibility of accurate sound velocity measurement. A delay control unit operating with subpicosecond precision has also been designed for femtosecond pump-probe experiments using a free electron laser at SPring-8 campus.

• OSTI ID: 21410369
• Journal Information: AIP Conference Proceedings, Vol. 1234, Issue 1; Conference: SRI 2009: 10. international conference on radiation instrumentation, Melbourne (Australia), 27 Sep - 2 Oct 2009; Other Information: DOI: 10.1063/1.3463375; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
ELECTRIC POTENTIAL
FINE STRUCTURE
FREE ELECTRON LASERS
LASER RADIATION
PHASE SHIFT
PULSES
PUMPING
RADIOWAVE RADIATION
SOUND WAVES
SPRING-8 STORAGE RING
STABILITY
SYNCHROTRON RADIATION
TIME DELAY
TIME RESOLUTION
X RADIATION
X-RAY DIFFRACTION
X-RAY SPECTRA
X-RAY SPECTROSCOPY
BREMSSTRAHLUNG
COHERENT SCATTERING
DIFFRACTION
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
LASERS
RADIATION SOURCES
RADIATIONS
RESOLUTION
SCATTERING
SORPTION
SPECTRA
SPECTROSCOPY
STORAGE RINGS
SYNCHROTRON RADIATION SOURCES
TIMING PROPERTIES