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Korean Facilities (10)

Korea Atomic Energy Research Institute(KAERI)

-Ensuring isotope production infrastructure by 30MeV proton beam production equipment -Rare isotope accelerator(metal isotopes) development -Using particle beam to develop the convergence technologies through physics, industry and life

Korea Atomic Energy Research Institute(KAERI)

- KOMAC(Korea Multi-puropose Accelerator Complex) as a branch institute of KAERI (Korea Atomic Energy Research Institute), is a national research facility which operates a 100 MeV high-power proton accelerator and low-energy ion beam facilities to offer an optimum proton beam and various ion beam services, essential in various R&D fields

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.

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World’s Facilities (98)

Netherlands / University of Groningen

The University of Groningen (Rijksuniversiteit Groningen; RUG) is a public research and education organisation. It has nine broad faculties pursuing research in various fields of science. The Nuclear-Physics Accelerator Institute (Kernfysisch Versneller Instituut; KVI) is the only topical interfaculty institute.

Spain / Consortium for the Construction, Equipping and Exploitation of the Synchrotron Light Source (CELLS)

ALBA is a 3rd Generation Synchrotron Light facility located in Cerdanyola del Vall?s, Barcelona, Spain, and it is the newest source in the Mediterranean Area. It is governed by a public consortium created in March 2003: the Consortium for the Construction, Equipping and Exploitation of the Synchrotron Light Source (CELLS), owned and financed in equal part by the Spanish and the Catalonian Administration. ALBA has been identified as a “Singular Technological and Scientific Infrastructure” among the Spanish scientific infrastructures. It is networked with other Synchrotron Light Sources in and outside Europe through common European projects and bilateral collaboration agreements. The facility is based on a chain of accelerators which produce, accelerate up to 3 GeV and store in a synchrotron ring electron beams which emit Synchrotron Light ranging from infrared up to hard X-ray of tens of keVs. Up to 31 ports are available to extract the light as well as the space for the corresponding beamlines and related experimental hutches. Buildings for conventional technical systems and for specialized laboratories complete the facility.

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.

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Publication (3)

Youngdo Joo, et. al., Nucl. Instrum. Methods Phys. Res. Sect. A, Volume 843, 21 January 2017, pp 50-60, doi.org/10.1016/j.nima.2016.11.005

In order to achieve beam acceleration to the beam energy of 10 GeV at the end of its 716 m-long linear accelerator (Linac), the Pohang Accelerator Laboratory X-ray Free Electron Laser (PAL-XFEL) is going to operate the Stanford Linear Accelerator Energy Doubler (SLED) at the maximum klystron output peak power of 80 MW, with a pulse length of 4 μs, and at a repetition rate of 60 Hz. The original SLED that had been used in Pohang Light Source-II (PLS-II) can no longer sustain such a high-power operation because excessive radiation caused by RF breakdown has been frequently detected even at the lower klystron peak power during the PLS-II operation. Therefore, a new SLED is designed by modifying both the 3-dB power hybrid and the waveguide-cavity coupling structure of the original SLED where the excessive radiation has been mainly detected. The finite-difference time-domain (FDTD) simulation in the CST Microwave Studio shows that the new SLED has a peak electric field and a surface current lower than those of the original SLED at the same level of the RF input peak power, which would secure stable high-power operation. All of the 42 SLEDs in the PAL-XFEL Linac are newly fabricated and installed. During the RF conditioning of the PAL-XFEL Linac, no significant vacuum and radiation issue was found in the new SLEDs. Finally, the accelerated electron beam energy of 10 GeV obtained at the end of the PAL-XFEL Linac verified that the RF performance of the new SLED is stable.

Jaehyun Lee, et. al., Nucl. Instrum. Methods Phys. Res. Sect. A, Volume 843 (2017), pp 39–45 dx.doi.org/10.1016/j.nima.2016.11.001

X-ray free electron lasers (XFELs) require electron beams with a peak current of several kA and a transverse emittance below 1 mm mrad. The uncorrelated energy spread of the beam should be as small as 0.01% of the beam energy. A photoinjector generates an electron beam satisfying the requirements, however the uncorrelated energy spread of the beam is too small, about one keV. A beam with such a low uncorrelated energy spread may suffer from the longitudinal microbunching instability when the beam is accelerated and compressed through a linear accelerator. A laser heater system in the injector minimizes the microbunching instability growth by controlling the uncorrelated energy spread of the beam. In this paper, we introduce the PAL-XFEL laser heater system and the commissioning result. The laser heating effects depending on the undulator gap, infrared laser pulse energy and laser beam size are studied. Experimental studies on the laser heating depending on the relative spatial position between the infrared laser and electron beam are discussed in detail.

Joonkon Kim, John A. Eliades, Byung-Yong Yu, Weon Cheol Lim, Keun Hwa Chae, Jonghan Song Nuclear Instruments and Methods in Physics Research B 391 (2017) 57–63

The Korea Institute of Science and Technology (KIST, Seoul, Republic of (S.) Korea) ion beam facility consists of three electrostatic accelerators: a 400 kV single ended ion implanter, a 2 MV tandem accelerator system and a 6 MV tandem accelerator system. The 400 kV and 6 MV systems were purchased from High Voltage Engineering Europa (HVEE, Netherlands) and commissioned in 2013, while the 2 MV system was purchased from National Electrostatics Corporation (NEC, USA) in 1995. These systems are used to provide traditional ion beam analysis (IBA), isotope ratio analysis (ex. accelerator mass spectrometry, AMS), and ion implantation/irradiation for domestic industrial and academic users. The main facility is the 6 MV HVEE Tandetron system that has an AMS line currently used for 10Be, 14C, 26Al, 36 Cl, 41Ca and 129I analyses, and three lines for IBA that are under construction. Here, these systems are introduced with their specifications and initial performance results.