Quenchard, the Superconducting Duke Mug
A superconducting magnet quenches when a local spot turns normal; Joule heating spreads the normal zone and the stored energy dumps. NbTi: Tc ≈ 9.2 K.
The joke: 'Goes normal' is the insider phrase for losing superconductivity; one hot spot is enough. The slogan on the mug reads ONE WARM SPOT. EVERYTHING GOES NORMAL.
Source: M. N. Wilson, Superconducting Magnets (Oxford, 1983).
Shipping calculated at checkout by destinationMade to order, ships in ~10 days
Details
Size & material11oz · 15oz
Black glossy ceramic mug with a C-handle. Lead- and BPA-free.
- 11oz: 0.33 l
- 15oz: 0.44 l
CareDishwasher & microwave safe
Dishwasher safe (top rack) or hand wash. Microwave safe.
ShippingBy destination
Shipping calculated at checkout by destination.
Made to order: about 10 days of production and handling before it ships.
Returns & replacements21 days
Every item is printed to order, so we can’t accept returns or exchanges for change of mind, or if you ordered the wrong size or colour.
Print defect, misprint, damage or the wrong item? We’ll send a free replacement, or a refund if you prefer. Report it within 21 days of delivery with a photo; no need to send it back.
The physics
Equations
| Symbol | Meaning | Unit |
|---|---|---|
| \(T\) | conductor temperature | \(\mathrm{K}\) |
| \(T_c(B)\) | critical temperature at field B | \(\mathrm{K}\) |
| \(\rho\) | electrical resistivity | \(\mathrm{Ω·m}\) |
| \(E\) | stored magnetic energy dumped in a quench | \(\mathrm{J}\) |
| \(L\) | magnet inductance | \(\mathrm{H}\) |
| \(I\) | operating current | \(\mathrm{A}\) |
Sources
- M. N. Wilson, Superconducting Magnets (Oxford, 1983)
Field notes
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