Superconducting Definition and 86 Threads

I'm doing an experiment which requires the fabrication of a superconducting hollow cylinder but I am unable to find a firm which does custom manufacturing of this nature. I have found numerous which sell the high Tc powders (YBCO BSCCO). My question is if I do just buy the powders what could I...

As far as I can understand, after inducing a current inside a superconducting ring or spire, the current keeps flowing into the ring "for ever". Is this correct? Since electrons have no "friction" against the superconducting lattice, does this mean that I can virtually accelerate them...

Hello, I've been trying to puzzle this one out and even the mighty internet has not been particularly helpful, so here goes: Say you have a current carrying copper wire perpendicular to a magnetic field. Let's give some values for clarity: the length of the wire is 1m, the current is 3A...

Could anyone please explain what 'Superconducting instability' means? If there are some good references to read, that would be really nice!

Is it possible to levitate a magnet in a superconducting pipe or a ring? Is it possible to try to calculate this using the method of images and treat the magnet as a little current loop? Any input will be much appreciated.

This may seem a stupid question, but I can't find information anywhere else. What equation does one use to calculate the current present in a superconducting circuit, as I=V/R fails?

howdy, I have never worked with superconductive circuitry, nor do I know of it's use much past MRI machines with large coils and in its research for transmission lines. What if you were to make a superconducting capacitor, and place it in parallel with a superconducting coil to make a...

I know this isn't just a simple problem, and it depends on a lot of things like the critical magnetic field at various temperatures, etc. And I'm still learning to calculate things like inductance and how that (eventually) relates to power. But suppose there were a material that was a...

Hi In litterature, I have noticed some authors write the dispersion for the d-wave gap as Δ(k)=Δ[cos(kx)-cos(ky)]/2, and some write it as Δ(k)=2Δ[cos(kx)-cos(ky)]. Where does this difference come from?

The canceled Superconducting Super Collider had 3x beam energy of 40TEV vs LHC 14TEV. While it has been cancelled, could it be re-started 20-30 years after LHC hits diminishing returns in the future? Is there any new expected physics in SSC range over and above LHC that would make it worth...

Hello. I got this question, it pursues me in my sleep lately. What will happen with a superconducting ring, passed through magnetic field? I mean like will the electrons even flow in it, taking that magnetic field is banned out of the material? And if they flow will the ring need extra force...

The multiple coils superconducting maget is uaually quench protected by bypass diodes. The heat spreading model is mentioned on textbook for coil to coil quench spreading. But the heat spreading is not fast enough for magnet quench protection. Because the theoretical quench protection...

Looked at Maxwell's eqns after quite some time,and was wondering, what happens if we apply an alternating flux to a superconducting coil? An emf should be produced, but there's actually no emf in a superconductor!

The SuperConducting Train The Superconducting train principle, I've seen this video on Geekologie and then followed the link to Youtube. The thing is i don't understand the physics behind this, and would love for someone to be able to explain how its working, especially the contents of the...

Here's an interesting article about a new breakthrough in the manufacture of a superconducting radio-frequency cavity: http://nextbigfuture.com/2009/09/superconducting-radiofrequency-cavity.html If this new cavity were tested for EMdrive purposes, could it reveal a new mechanism for...

Suppose that, a sudden current pulse has been generated (by means of a Magnet) in a Super-Conducting Loop (or coil). It is commonly said that the current remain there forever. Is is true?? I mean will the current remain in the loop undiminished till t=infinity? But theoretically it isn't...

Hi guys, I'm new to the forums! Just recently, I became very interested in the SSC. After looking at some of the plans and details, I couldn't help but wonder why the project has not been reopened... I was thinking of possibly either: 1) Getting a nation wide petition signed to reopen...

Is it Theoretically possible to build a superconducting motor/generator/energy storage device all at superconducting temperatures? The device needs to operate in vacuum, accelerate and decelerate with only field energies exiting the vacuum chamber. I don't have much faith in batteries at 4oK...

I read about electrons and positrons free fall within a superconducting cylinder, in this book (p 105): https://www.amazon.com/dp/0521675537/?tag=pfamazon01-20 I don't understand what I read. Apparently, electrons would feel an electric field mg/e that would actually freeze them in the...

Hi, here is a couple of questions about superconductors Each superconducting material has a rating for critical field intensity. Now, does the field generated by its own current count? And also what is the current superconducting (type II) material with highest current densities achieved...

Hello everyone, Do you know any equation can help me to calculate the Coulomb pseudo-potential mu*, cause I'm working on McMillan formula Tc= thetaD/1.45 {-1.04(1+lamda)/[ lamda – mu*(1+ 0.62 lamda)]} trying to find the critical temperature Tc for a superconducting system I only have three...

Hi, I have one question about superconducting materials. Do Cooper pairs form below critical temperature of material or do they form below critical temperature AND if the current exists?

I have read in several places that superconducting materials are the closest phenomenon to perpetual motion known to science (constant flowing electrons within a circuit without resistance). The problem is that the energy required to cool the inducting material to its superconducting temperature...

Hey, think this post belongs in this section. I've seen a few videos about superconducting levitation and it is used on trains, correct? I was wondering if it is possible to levitate an object like a car and propel it forward? Heres a clip, please don't delete :) watch it please :D...

Question regarding the propogation of the e-field.. would it propogate at nearly the speed of light? If a lightbulb were put on a circuit, with half a light year of cable coming from each terminal on the bulb and connected to a sufficient battery/power supply, 1/2 a year until the bulb...

Just want to confirm if my understanding is correct regarding the detection method of terahertz radiation using superconducting tunnel junctions (a Superconductor-Insulator-Superconductor device). For a Niobium superconductor material (having Eg = 3meV corresponding to about 0.7 THz frequency...

In the giant proximity effect of superconductors, the penetrating supercurrent can be modeled using bosons. During some project work, modeling this phenomena Using vortices, I was thinking, whether the bosons can penetrate the interface of the normal conducting material being modeled by a helix...

I need some clarification on what is meant by the energy gap of a superconductor. From my own understanding, is is caused by the manifestation of cooper pair, and hence can not obey fermi-dirac statistics, but abides with bose-einstein statistics. However, I feel that this reasoning is...

http://www.doc.ic.ac.uk/~mpj01/ise2grp/energystorage_report/node8.html" ah just what i need for that Superconducting Railgun project :rolleyes:

I would very much like to know what work has or is being done on the notion of a superconducting relativistic vacuum. Google, so far, has not been much help. I'd greatly appreciate any clues or info. I ask as I'm doing my own investigations, and I'm far enough along to start worrying about...

In the given circuit, Resistance R is made up of type-I superconducting material with transition temperature Tc. The initial temperature of the circuit is T(>Tc). At time t=t0 the temperature is dropped below Tc. Find the current in the circuit at: 1] at t<t0 and through AB 2] at t=t0 3] at t>t0...

I had a customer looking for some equipment that would be used in Europe to cool down a superconducting magnet that was to be installed there possibly in 2006. It must be an exceptionally massive magnet because he's looking for a very large cryogenic compressor and he says it will take 6 months...

I'm reviewing a letter regarding the sheilding of an object using a superconducting magnet as is commonly found in MRI machines. The claim is that the magnetic field created by superconducting windings (wire which is carrying a current and thus creating a magnetic field) and wrapped around an...

http://www.senate.gov/legislative/LIS/roll_call_lists/roll_call_vote_cfm.cfm?congress=103&session=1&vote=00296 I'm a pro-science independent, but this thing really could influence my party affiliation. Apparently, here is the Senate vote that killed it. It was also killed in the House of...

A while ago I postulated that black holes (sometimes) are superconducting. Neutroncount ruined my string with his heavy insults. Recently someone got the nobel prize for a similar theory: that neutron stars are superconducting. It feels like someone has stolen my theory. I created...

Although low temperature superconducting (LTS) switches are pretty common nowadays (used in MRI magnets etc), HTS switches are far less so, in fact I'm wondering whether the one I built recently is the world's first? Does anyone know otherwise? Does anyone care? (I doubt it). Also, is this...