Tag Archives: magnetic field
Tracking the Meissner effect under pressure
In the last two or three years, groups of scientists from around the world have made several claims that they had discovered a room-temperature superconductor. Many of these claims concerned high-pressure superconductors — materials that superconduct electricity at room temperature … Continue reading
Posted in Scicomm
Tagged diamond anvil cell, flux-pinning, magnetic field, materials science, Meissner effect, nitrogen vacancy centres, optical magnetometry, quantum spin, room-temperature superconductor, superconductivity
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A new source of cosmic rays?
The International Space Station carries a suite of instruments conducting scientific experiments and measurements in low-Earth orbit. One of them is the Alpha Magnetic Spectrometer (AMS), which studies antimatter particles in cosmic rays to understand how the universe has evolved … Continue reading
Posted in Scicomm
Tagged Alpha Magnetic Spectrometer, cosmic rays, deuterons, helium 4, helium-3, International Space Station, magnetic field, Massachusetts Institute of Technology, rigidity, statistical significance
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How do you study a laser firing for one-quadrillionth of a second?
I’m grateful to Mukund Thattai, at the National Centre for Biological Sciences, Bengaluru, for explaining many of the basic concepts at work in the following article. An important application of lasers today is in the form of extremely short-lived laser … Continue reading
Posted in Scicomm
Tagged attophysics, attosecond laser, attosecond streaking, band gap, boxcar integrator, carrier wave, carrier-envelope phase, carrier-envelope phase offset, chirped pulse amplification, circular polarisation, conduction band, dielectrics, electric field, femtochemistry, femtosecond laser, magnetic field, Maxwell's equations, pulse train, time of flight spectroscopy, vacuum, valence band
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Second star found to have magnetic-field flips also flips them fast
Tau Bootis A is a Sun-like white-dwarf star about 51 light-years from Earth. Its magnetic field changes polarity once every year as opposed to the 11 years it takes our Sun. While astronomers don’t really know why this is the … Continue reading
Posted in Uncategorized
Tagged differential rotation, magnetic field, meridional circulation, stellar cycles, Tau Bootis A
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