Category Archives: Research

Hydrogen Trapping in Tungsten: Impact of Helium Irradiation and Thermal Cycling

The impact of helium (He) plasma exposure with He fluxes relevant for ITER and WEST on the near-surface microstructure of polycrystalline tungsten (W) is investigated by coupling transmission electron microscopy (TEM) analysis and thermal desorption spectrometry (TDS) measurements. The samples … Continue reading

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Molecule’s Long-Lived Vibration in Superfluid Helium

The solvent in which a molecule is suspended can strongly influence the molecule’s motion. Now researchers have demonstrated that a molecule dissolved inside a superfluid helium nanodrop experiences very little effect from the solvent. The researchers measured, with femtosecond resolution, … Continue reading

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ORNL Neutrons Add Advanced Polarization Capability for Measuring Magnetic Materials

Understanding magnetism at its most fundamental level is vital to developing more powerful electronics, but materials with more complex magnetic structures require more complex tools for studying them—powerful tools simply referred to as “neutrons.” Two of the world’s most powerful … Continue reading

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2 K Superfluid Helium Cryogenic Vertical Test System for Superconducting Cavity of ADS Injector I

Purpose The accelerator-driven subcritical system (ADS) is the internationally recognized key technology of nuclear waste problem treatment, of which superconducting proton linac is an important part. With the support of the strategic science and technology pilot project of the Chinese … Continue reading

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Detecting Helium Reionization with Fast Radio Bursts

Fast radio bursts (FRB) probe the electron density of the universe along the path of propagation, making high redshift FRB sensitive to the helium reionization epoch. We analyze the signal to noise with which a detection of the amplitude of … Continue reading

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