In their paper published in the journal Over the past several years, magnetic fields have become more important in a variety of research areas, including medicine. It pivoted easily in both axes of rotation when within about 8 or 10 inches of the permanent magnet assembly I was interested in mapping the field of. Your email address is used You only get one set of eyes. Huge magnetic fields can be created by firing intense, circularly polarized laser pulses at a target, according to calculations by physicists in Italy, Germany and Russia.

But which batteries?The pivots should be non-ferrous so they don't get attracted to the magnets you're using this compass to sense. They will do almost nothing at these wavelengths. 5 years ago Your feedback will go directly to Science X editors.Thank you for taking your time to send in your valued opinion to Science X editors. You can be assured our editors closely monitor every feedback sent and will take appropriate actions. It's not pretty, and I'm a little embarrassed about this step, but I wanted functionality, pronto, so didn't over engineer anything.

These give linear output up to about +/-100mT, as opposed to the GMR sensor linked which maxes out at about 8 mT. Light will follow a bent path is space-time if distorted by a massive object. A magnet that is free to orient itself, but is held centered in a given position, will turn until it's poles align with the local magnetic field lines.

Madey used a 43 MeV electron beam and 5 …

on Thanks el-Raza.

The magnetic structures resulting from a plasma instability predicted by the physicist Erich Weibel about 50 years ago have been evidenced at surprisingly large scales in a laser-driven … Thanks, I will make a few and hand them out to my students. 5 years ago March 25, 2020 Take care to note that button cells are positive on the body, negative on the button dimple, in contrast with AA or AAA batteries.

on Can you provide a link to that work? Reply You could also use a coping saw to cut out gimbal parts by hand, but a laser cutter makes this vastly faster and more convenient and precise. If the field were large enough, you could, I suppose, have a large electrical dipole which would align with the field in a similar fashion as this magnetic gimbal compass; perhaps a small gimbal compass with a pair of sphere electrodes on it and a high voltage source maintaining a large potential between them would create sufficient torques to align that dipole with the field.

The first free-electron laser was developed by John Madey in 1971 at Stanford University utilizing technology developed by Hans Motz and his coworkers, who built an undulator at Stanford in 1953, using the wiggler magnetic configuration. Bingo: rounded, smooth, deburred wires. But it was small, and so hard to see.

I have to admit though that I wouldn't know how to do that. I have pickle jar full of small red laser diodes the size of pencil erasers, in small brass cylindrical housings. I got about 70 of these for $20 off ebay, and they were perfect for this purpose, being so small.

Of course, there's some question as to whether the magnet is responding to the input or output winding's current, but it's still pretty cool...and somewhat startling if you aren't expecting your magnet to start buzzing in your hand (still haven't found that magnet) while you're trying to stick a reminder to buy more tubes on the fixture. But of greater concern is that often times these Chinese "1mW" laser modules can be way overspec. I had to put the batteries on the inner ring with the laser. AWG22 single-conductor hook-up wire was stiff enough that, if the grooves were of tapering depth, the wire would jam in between the acrylic and battery, making useful connection. Otherwise it'll not spin smoothly. 5 years ago Their research suggests that the mysterious phenomenon of “radiation friction” plays a crucial role in generating the field. After drilling pivot holes, I rounded the edges of the acrylic with a file around the pivot hole, to make sure it wouldn't bind. This document is subject to copyright. I've added additional cautionary text. Medical Xpress covers all medical research advances and health news Tech Xplore covers the latest engineering, electronics and technology advances Science X Network offers the most comprehensive sci-tech news coverage on the web Would be interesting if a similar device could be made to visualize electrical fields. Your opinions are important to us.