Abstract
Recently, quantum beams such as neutrons or X-rays of synchrotron radiation are being used to measure the internal strain of practical superconducting wires. These quantum beams can observe the superconducting materials in practical wires directly. The neutron and X-ray diffractions are useful methods for observing the internal strains in various practical superconducting wires. However, large experimental facilities must be visited in order to use neutron or synchrotron radiation. If it is possible to evaluate superconducting materials in practical wires at our own laboratory, it would be very useful. In this paper, I discuss the possibility of the internal strain evaluation of coated conductors using laboratory X-rays. The experiment of measuring the internal strain of a coated conductor was performed using Mo Kα. The diffraction peaks from a GdBCO in the coated conductor were observed. The behavior of the internal strain of a GdBCO in the coated conductor under tensile strain was estimated using laboratory X-rays. I found that this experimental technique is very useful for evaluating the internal strain of coated conductors and other thin superconducting tapes.
