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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Fusion Science and Technology
July 2025
Latest News
DOE issues new NEPA rule and procedures—and accelerates DOME reactor testing
Meeting a deadline set in President Trump’s May 23 executive order “Reforming Nuclear Reactor Testing at the Department of Energy,” the DOE on June 30 updated information on its National Environmental Policy Act (NEPA) rulemaking and implementation procedures and published on its website an interim final rule that rescinds existing regulations alongside new implementing procedures.
S. Ohdachi, F. Watanabe, S. Yamamoto, K. Toi, C. Suzuki, K. Ida, S. Muto, LHD Experiment Group
Fusion Science and Technology | Volume 58 | Number 1 | July-August 2010 | Pages 418-425
Chapter 8. Diagnostics | Special Issue on Large Helical Device (LHD) | doi.org/10.13182/FST10-A10827
Articles are hosted by Taylor and Francis Online.
Several types of diagnostic system for soft X-ray radiation (SXR) have been developed and installed on the Large Helical Device (LHD). Magnetohydrodynamic (MHD) activities are studied by the fluctuation component of SXR, and the electron temperature is measured from the spectrum of the SXR. PIN photodiode arrays are installed at three poloidal cross sections to study the equilibrium and fluctuations. The spatial resolution of an array is a few centimeters, and its frequency response is up to [approximately]300 kHz. Absolute extreme ultraviolet diode arrays are also used for lower-energy radiation, and edge MHD instabilities are thereby studied. There are tangentially viewing two-dimensional soft X-ray camera systems by which more detailed spatial structure can be studied. Radial profile of X-ray spectrum is measured by X-ray pulse height analyzer systems.