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Latest News
Argonne’s METL gears up to test more sodium fast reactor components
Argonne National Laboratory has successfully swapped out an aging cold trap in the sodium test loop called METL (Mechanisms Engineering Test Loop), the Department of Energy announced April 23. The upgrade is the first of its kind in the United States in more than 30 years, according to the DOE, and will help test components and operations for the sodium-cooled fast reactors being developed now.
I. Yamada, K. Narihara, H. Funaba, T. Minami, H. Hayashi, T. Kohmoto, LHD Experiment Group
Fusion Science and Technology | Volume 58 | Number 1 | July-August 2010 | Pages 345-351
Chapter 8. Diagnostics | Special Issue on Large Helical Device (LHD) | doi.org/10.13182/FST10-A10820
Articles are hosted by Taylor and Francis Online.
The Large Helical Device (LHD) Thomson scattering system measures electron temperature and density profiles of LHD plasmas along the LHD major radius at a horizontally elongated section. The LHD Thomson scattering system has an oblique backward-scattering configuration. The number of observation points and typical spatial resolution are 144 and 17 mm, respectively. The temporal sampling frequency is 10 to 100 Hz. Measurable temperature and density ranges are Te = 5 eV to 20 keV and ne 1018 m-3 , respectively. The LHD Thomson scattering system consists of several subsystems: laser system, light collection optics, polychromators, and data acquisition system. In the past decade, we have continued our efforts to improve the performance and reliability of the LHD Thomson scattering system through extension of measurable temperature and density ranges, Raman and Rayleigh calibrations for absolute density measurements, new laser beam positioning system, and plasma light monitor system for increasing data reliability. In this paper, we describe the recent progress of the LHD Thomson scattering system in detail.
