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Korean Facilities (5)

Pohang University of Science and Technology (POSTECH)

- The construction of PAL-XFEL, a 0.1nm hard X-ray FEL facility consisting of a 10-GeV S-band linac have been completed in the end of 2015. FEL-XFEL achieved 0.1 nm hard X-ray on the 29th November, 2016. - Comparative advantages in 21st century state-of-the-art science field, according to the construction of X-FEL accelerator and 3 beamlines. ( XSS(X-ray Scattering & Spectroscopy), NCI(Nano Crystallography & Coherent Imaging), SSS(Soft X-ray Scattering & Spectroscopy)) - In order to accomplish new researches using the 4th-generation synchrotron radiation accelerator, which is the third in the world, we focus on all the capabilities of the institute.

Pohang University of Science and Technology (POSTECH)

- The Pohang Light Source (PLS) at the Pohang Accelerator Laboratory(PAL) is a third-generation light source, the only synchrotron radiation facility in Korea, and the fifth machine of its kind in the world. In 1988, PAL was organized for the construction of the PLS. Ground-breaking was celebrated in 1991, and PLS construction was completed in 1994. In 1995, the PLS opened two beamlines to public users. The PLS was initially operated at 2GeV in 1995. Since 2002, the energy of the electron beam has been increased to 2.5GeV. The Pohang Light Source(PLS) was upgraded as the PLS-II in three years from 2009 to 2011. The electron beam energy was increased from 2.5 GeV to 3 GeV, and the beam current rose from 170 mA to 400 mA. The number of straight sections for the insertion devices increased from 10 to 20. - Two or three beamlines have been added each year for the past 20 years, and as of 2017 we have in total 34 beamlines in operation and 2 beamlines under construction. Since its opening in 1995, PAL has attracted 38,000 (and growing) individual users from domestic and around the world and produced 12,000 scientific articles in total. For last twenty years, PAL has contributed to remarkable growths not only in quantity but in quality of synchrotron research.

Korea Basic Science Institute

Femtosecond Multidimensional Laser Spectroscopic System (FMLS), which was developed and operated by the Seoul Center since 2009, measures fast molecular events on femtosecond time scale and is being used for investigating ultrafast photochemical reaction dynamics of a variety of molecular systems and nanomaterials in chemistry, biology and material science. - 2D vibrational and electronic spectroscopy in the infrared and visible frequency ranges (lithium ion, gold nanoparticles, photosynthetic system, etc.) - Pump-probe transient absorption spectroscopy of molecular systems and materials - Coherent Raman spectroscopy utilizing nonlinear optical effects (SRS, CARS)

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World’s Facilities (129)

Austria

The idea of a bilateral Nuclear Magnetic Resonance (NMR) Center for solid and solution state spectroscopy arose through the collaboration between scientists of JKU and the University of South Bohemia in 2004. It was realized through a joint project within the ETC Austria - Czech Republic 2007-2013 programme of the European Union (EU) between the Johannes Kepler University Linz (JKU) and the University of South Bohemia in ?esk? Bud?jovice (USB): “Cooperative Regional Research Infrastructure for Molecular Science and Technology” (RERI-uasb) Thus, the first Austro?Czech Scientific Research Center was realized in 2011. Since September 2011 three superconducting magnets with field strengths of 7.0 T, 11.7 T and 16.4 T and a variety of probes are operating at the Institute of Organic Chemistry at JKU Linz. They are available and used for research and teaching by both universities. The NMR Center is co-financed with the European Union from the European Region Development Fund and operated jointly by both universities.

Hungary / Institute for Nuclear Research-Hungarian Academy of Sciences (HTA Atomki)

The ATOMKI accelerator center is a research infrastructure complex including the most important accelerators of the institute and also the main research facilities around the accelerators. The accelerators connect each other by a complimentary way concerning the achievable ion and charge choice, the beam intensity and energy. This unique infrastrucure group has been used for decades in a high number of research programmes by the researchers of Atomki and University of Debrecen ans also by domestic and foreign researchers, students, PhD students. The members of the accelerator center are (at the accelerators the energy range is written in brackets): VDG-1 Van de Graaff generator (50-1500 keV), VDG-5 Van de Graaff genea?tor (0.8-3.5 MeV), Cyclotron (1-26 MeV), ECR ion source (50 eV - 30 keV)*charge, Time-of-flight electron spectrometer, B-type isotope laboratory, Cyclotron neutron source with berilium target, Quasi-monoenergetic fast neutron source, ESA-21 electron spectrometer.

Hungary / Institute for Nuclear Research-Hungarian Academy of Sciences (HTA Atomki)

Laboratory consists of the following spectrometers, which are mostly used at the Debrecen accelerators, but occasionally they are used in different accelerator labs abroad. 1.) Split-pole magnetic spectrometer measuring protons an heavy ions. It is equipped with position sensitive Si focal plane detector with the length of 72 cm. 2.) Large scattering chamber with Si detector telescopes. 3.) DIAMANT light charged particle detector system. 4.) OBELISK TOF spectrometer for fission products. 5.) CLOVER-type gamma-spectrometer with BGO anti-Compton shield. 6.) High efficiency (100 %) and smaller HPGe detectors. 7.) High energy (5-20 MeV) electron-positron pair spectometer. 8.) Superconducting magnetic electronspectrometer. 9.) LENA neutron TOF spectrometer. 10.) CAMAC, VME and VXI type data acquisition systems for the spectrometers. 11.) Leybold UNIVEX 350 vacuum avaporator.

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Publication (20)

Lee C.-H., Lee J., Yeo S., Lee S.-H., Kim T., Cha H.-G., Eun Y., Park H. J., Kim S. M., Lee K.-H. Carbon 2017 July 14. pii: 123(17)122-128. doi: 10.1016/j.carbon.2017.07.045

We report the synthesis of carbon nanotube (CNT) forests with a narrow diameter distribution based on Fe ion implantation method. By annealing the Fe-implanted SiO2/Si wafer in an Ar atmosphere at 800°C for 15 min, the Fe particles on the surface of SiO2 layer are successfully formed by the diffusion of Fe atoms from the SiO2 layer. Interestingly, the size distribution of Fe catalyst particles for Fe-implanted SiO2/Si wafers does not change with the prolonged annealing durations of up to 12 h. Using secondary ion mass spectroscopy and transmission electron microscopy (TEM), we confirmed that the implanted Fe atoms diffuse out of the SiO2 layer and form Fe particles on both the SiO2 surface and the interface between SiO2 and Si. The cross-sectional TEM images indicate that the Fe catalyst particles are anchored in the SiO2 layer, which limits the particles' mobility and results in an invariant catalyst size distribution for prolonged annealing durations. Therefore, we anticipate that implantation can be an efficient alternative catalyst preparation method for CNT forest growth which can solve various growth issues that are inherently caused by conventional physical vapor deposition method.

Park J. K., Kwon H.-J., Lee C. E., Sci. Reports 2016 Mar 18. pii: 6(16)23378. doi: 10.1038/srep23378

The diffusion properties of H+ in ZnO nanorods are investigated before and after 20 MeV proton beam irradiation by using 1H nuclear magnetic resonance (NMR) spectroscopy. Herein, we unambiguously observe that the implanted protons occupy thermally unstable site of ZnO, giving rise to a narrow NMR line at 4.1 ppm. The activation barrier of the implanted protons was found to be 0.46 eV by means of the rotating-frame spin-lattice relaxation measurements, apparently being interstitial hydrogens. High energy beam irradiation also leads to correlated jump diffusion of the surface hydroxyl group of multiple lines at ~1 ppm, implying the presence of structural disorder at the ZnO surface.

Oranj L. M., Jung N.-S., Oh J.-H., Lee H.-S. Nucl. Instrum. Methods Phys. Res. B 2016 Mar 24. pii: 375(16)26-31. doi: 10.1016/j.nimb.2016.03.025

The proton beam intensity of a 100-MeV proton linac at the Korea Multi-purpose Accelerator Complex (KOMAC) was measured by an Au activation analysis using 197Au(p, pn)196Au and 197Au(p, p3n)194Au reactions to determine the accuracy and precision of beam intensity measurement using Gafchromic film dosimetry method. The target, irradiated by 100-MeV protons, was arranged in a stack consisting of Au, Al foils and Pb plates. The yields of produced radio-nuclei in Au foils were obtained by gamma-ray spectroscopy. The FLUKA code was employed to calculate the energy spectrum of protons onto the front surface of Au foils located at three different depth points of the target and also to investigate the condition of incident beam on the target. A good agreement was found between the beam intensity measurements using the activation analysis method at three different depth points of the target. An excellent agreement was also observed between the beam intensity measurements using the Au activation analysis method and the dosimetry method using Gafchromic film.

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