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by
Ciro Santilli
(@cirosantilli,
32
)
SQUID device
tags:
Electronic component
,
Magnetometer
Can be used as a very precise
magnetometer
.
There are high temperature
yttrium barium copper oxide
ones that work on
liquid nitrogen
.
Video 1
. Superconducting Quantum Interference Device by Felipe Contipelli (2019)
Source
. Good intuiotionistic video. Some points deserved a bit more detail.
Video 2
. Mishmash of SQUID interviews and talks by Bartek Glowaki.
Source
.
The videos come from:
www.ascg.msm.cam.ac.uk/lectures/
. Vintage.
Mentions that the
SQUID device
is analogous to a
double-slit experiment
.
One of the segments is by John Clarke.
Video 3
. Superconducting Quantum Interference Devices by
UNSW
Physics (2020)
Source
.
An experimental lab video for
COVID-19
lockdown. Thanks,
COVID-19
. Presented by a cute and awkward Adam Stewart.
Uses a
SQUID device
and control system made by
STAR Cryoelectronics
. We can see
Mr. SQUID
EB-03 written on the probe and control box, that is their educational product.
As mentioned on the Mr. SQUID specs, it is a
high-temperature superconductor
, so
liquid nitrogen
is used.
He then measures the
I-V curve
on an
Agilent Technologies oscilloscope
.
Unfortunately, the video doesn't explain very well what is happening behind the scenes, e.g. with a
circuit diagram
. That is the curse of university laboratory videos: some of them assume that students will have material from other internal sources.
youtu.be/ql2Yo5LgU8M?t=211
shows the classic voltage oscillations, presumably on a magnetic field sweep, and then he puts a
magnet
next to the device from outside the
Dewar
youtu.be/ql2Yo5LgU8M?t=253
demonstrates the formation of
Shapiro steps
. Inserts a
Rohde & Schwarz
signal generator into the Dewar to vary the flux. The result is not amazing, but they are visible somewhat.
Video 4
. The Ubiquitous
SQUID
by John Clarke (2018)
Source
.
Table of contents
DC SQUID
DC SQUID
SQUID device
Two parallel
Josephson junctions
.
In
Ciro's ASCII art circuit diagram notation
:
| +-+-+ | | X X | | +-+-+ |
Tagged
Mr. SQUID
Ancestors
Applications of Josephson Junctions
Josephson effect
Superconductivity
Electrical resistivity and conductivity
Condensed matter physics
Physics
Natural science
Science
Index
Incoming links
Applications of Josephson Junctions
Ciro's ASCII art circuit diagram notation
It is OK to treat things as black boxes
Magnetometer
SQUID device
Superconducting quantum computer need non-linear components
Superconducting quantum computing
Transmon
Yttrium barium copper oxide
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