Publisher Correction: Implications of the strain irreversibility cliff on the fabrication of particle-accelerator magnets made of restacked-rod-process NbSn wires.

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Implications of the strain irreversibility cliff on the fabrication of particle-accelerator magnets made of restacked-rod-process NbSn wires.

The strain irreversibility cliff (SIC), marking the abrupt change of the intrinsic irreversible strain limit ε as a function of heat-treatment (HT) temperature θ in NbSn superconducting wires made by the restacked-rod process (RRP), is confirmed in various wire designs. It adds to the complexity of reconciling conflicting requirements on conductors for fabricating magnets. Those intended for the high-luminosity upgrade of the Large Hardon Collider (LHC) at the European Organization for Nuclear Research (CERN) facility require maintaining the residual resistivity ratio RRR of conductors above 150 to ensure stability of magnets against quenching.

Precipitous change of the irreversible strain limit with heat-treatment temperature in NbSn wires made by the restacked-rod process.

The intrinsic irreversible strain limit ε of NbSn superconducting wires, made by the restacked-rod process and doped with either Ti or Ta, undergoes a precipitous change as a function of temperature θ of the final heat-treatment for forming the A15 phase. NbSn transitions from a highly brittle state where it cracks as soon as it is subjected to an axial tensile strain of any measurable amount, to a state more resilient to tensile strain as high as 0.4%.

Detection of Hazardous Liquids Using Microwaves.

We investigate the feasibility of using dielectric spectra to classify hazardous and nonhazardous liquids. The dielectric spectra of several liquids was obtained with a shielded-open coaxial fixture, and we present a new full-wave model for calculating the complex permittivity of liquids using this fixture. Using the measured complex permittivity for each liquid, we examine several classification methods for distinguishing between the hazardous and nonhazardous liquids and report on the error rates of each method.

Color error in the digital camera image capture process.

The color error in images taken by digital cameras is evaluated with respect to its sensitivity to the image capture conditions. A parametric study was conducted to investigate the dependence of image color error on camera technology, illumination spectra, and lighting uniformity. The measurement conditions were selected to simulate the variation that might be expected in typical telemedicine situations.

A Liquid Density Standard Over Wide Ranges of Temperature and Pressure Based on Toluene.

The density of liquid toluene has been measured over the temperature range -60 °C to 200 °C with pressures up to 35 MPa. A two-sinker hydrostatic-balance densimeter utilizing a magnetic suspension coupling provided an absolute determination of the density with low uncertainties. These data are the basis of NIST Standard Reference Material® 211d for liquid density over the temperature range -50 °C to 150 °C and pressure range 0.