Squid - definizione. Che cos'è Squid
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Cosa (chi) è Squid - definizione

VERY SENSITIVE SUPERCONDUCTING MAGNETOMETER USED TO MEASURE EXTREMELY SUBTLE MAGNETIC FIELDS
Superconducting quantum interference device; Superconducting QUantum Interference Device; Mr. SQUID; Superconducting Quantum Interference Device; Superconducting quantum interference devices
  • Diagram of a DC SQUID. The current <math>I</math> enters and splits into the two paths, each with currents <math>I_a</math> and <math>I_b</math>. The thin barriers on each path are Josephson junctions, which together separate the two superconducting regions. <math>\Phi</math> represents the magnetic flux threading the DC SQUID loop.
  • Left: Plot of current vs. voltage for a SQUID. Upper and lower curves correspond to <math>n \cdot \Phi_0</math> and <math>n+\frac{1}{2} \cdot \Phi_0</math> respectively. Right: Periodic voltage response due to flux through a SQUID. The periodicity is equal to one flux quantum, <math>\Phi_0</math>.
  • Electrical schematic of a SQUID where <math>I_b</math> is the bias current, <math>I_0</math> is the critical current of the SQUID, <math>\Phi</math> is the flux threading the SQUID and <math>V</math> is the voltage response to that flux. The X-symbols represent [[Josephson junction]]s.
  • Sensing element of a SQUID, 2008
  • The inner workings of an early SQUID, circa 1990<!-- seems to have been built after the [[National Bureau of Standards]] was renamed [[NIST]] in 1988.  Much more primitive SQUIDS were built at NBS in the first half of the 1970s. -->
  • A prototype SQUID

squid         
n.
Cuttle-fish, octopus, ink-fish (Sepia officinalis).
squid         
¦ noun (plural same or squids) an elongated, fast-swimming cephalopod mollusc with eight arms and two long tentacles. [Loligo and other genera: many species.]
?the flesh of squid as food.
?an artificial fishing bait resembling a squid.
¦ verb (squids, squidding, squidded) fish using squid as bait.
Origin
C16: of unknown origin.
Squid         
·noun A fishhook with a piece of bright lead, bone, or other substance, fastened on its shank to imitate a squid.
II. Squid ·noun Any one of numerous species of ten-armed cephalopods having a long, tapered body, and a caudal fin on each side; especially, any species of Loligo, Ommastrephes, and related genera. ·see Calamary, Decacerata, Dibranchiata.

Wikipedia

SQUID

A SQUID (superconducting quantum interference device) is a very sensitive magnetometer used to measure extremely subtle magnetic fields, based on superconducting loops containing Josephson junctions.

SQUIDs are sensitive enough to measure fields as low as 5×10−14 T with a few days of averaged measurements. Their noise levels are as low as 3 fT·Hz12. For comparison, a typical refrigerator magnet produces 0.01 tesla (10−2 T), and some processes in animals produce very small magnetic fields between 10−9 T and 10−6 T. SERF atomic magnetometers, invented in the early 2000s are potentially more sensitive and do not require cryogenic refrigeration but are orders of magnitude larger in size (~1 cm3) and must be operated in a near-zero magnetic field.

Esempi dal corpus di testo per Squid
1. The squid, a female, was not fully grown and was relatively small by giant squid standards.
2. The squid is the biggest specimen ever caught of the rare and mysterious deep–water species Mesonychoteuthis hamiltoni, or colossal squid.
3. "The giant squid became snagged on the jig." The camera took 550 digital images over the next several hours while the squid tried repeatedly to free itself.
4. "It was lovely char–grilled squid," I reminded him brightly.
5. VIDEO: See the giant squid launch its attack More follows...