Magnetic Field Profile in Classical Superconductors Vladimir Kozhevnikov, Tulsa
Ellis, John, Federal Courts Reporter has reference to this Academic Journal, PHwiki organized this Journal Magnetic Field Profile in Classical Superconductors Vladimir Kozhevnikov, Tulsa Community College, DMR 0904157 The field profile in Sn measured with Low-Energy Muons Insert: the London penetration depth data obtained from PNR (red point) in addition to LE-mSR (brown pp.) measurements. Superconductivity is (perhaps) the most fascinating in addition to ( as long as sure) the most challenging phenomenon with enormous potentials as long as applications. Examples of the current applications are MRI in addition to Large Hadron Collider. This year is 100 anniversary of its discovery. However, in spite of many outst in addition to ing achievements (marked by 10 Nobel Prizes!), the field still keeps lots of secrets. One of the longest st in addition to ing challenges is quantitative measurements of in-depth distribution of magnetic filed penetrating into superconductors in the Meissner state. This is the goal of our project. Such measurements pave the most direct way to the chief parameters, such as the London penetration depth in addition to the Pippard coherence length, controlling microscopic properties of superconductors. Neither of these parameters is known as long as any superconductor. This year we completed, as long as the first time, such measurements on In (see insert), using Low-Energy Muon Spin Rotation spectroscopy (LE-mSR) in addition to Polarized Neutron Reflectometry (PNR), in addition to per as long as med LE-mSR experiment on Sn. Cross LE-mSR in addition to PNR measurements are necessary to ensure reliability of results in addition to quantify their uncertainties. The data obtained agree with each other in addition to firmly support nonlocal Pippard in addition to BCS theories, predicting nonexponential decay of the penetrating magnetic field. Magnetic Field Profile in Classical Superconductors Vladimir Kozhevnikov, Tulsa Community College, DMR 0904157 Tulsa Community College is a two-years college of primary high education. TCC students involved in the project take a special class Selected topics in physics, where they study as long as emost topics of physics, staying beyond the st in addition to ard curriculum of college physics classes. Students completed the class have their tuition reimbursed from the grant. The most active students participated in the neutrons experiments in Chalk River Labs, Canada (winter 2010) in addition to muons experiments in Paul Scherrer Institute, Switzerl in addition to (summer 2010 in addition to summer 2011). The students took part at the APS March Meetings in 2010 in addition to 2011, in addition to at the Oklahoma Research Day conference (Cameron University, OK, 2010, 2011). All travel expenses are covered from the grant. As of today (August/2011) the class has been offered as long as three semesters; total 11 students graduated the class. One as long as mer student is currently employed in the Science in addition to Math division at TCC, Metro; other students continue their education in STEM specialties at universities of Oklahoma. Articles about this education opportunity appeared in TCC news in addition to in The Tulsa World newspaper (2/21/2011). Last Spring the PI gave a college-wide lecture devoted to 100 years of superconductivity which was attended by more than 60 students. The lecture recording will be soon available at the Science in addition to Math Division website.
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