High Tech Kit Experiments at secondary school - Amber

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Nov 15, 2013 (3 years and 9 months ago)

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Doctype

MOSEM Project

LLP
-
LdV
-
TOI
-
2007
-
NO/165.009



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1

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2013
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MOSEM Contractor

Simplicatus AS

P.O. Box 27

NO
-
2006 Løvenstad

Vegard Engstrøm


Phone +47

9118 8774

Fax +47 6300 2933

MOSEM Coordinator

University of Torun

Grudziadzka 5

PL
-
87
-
100 Torun

Grzegorz Karwasz


Phone +48 566

112 407

Fax +48 566 225 397

Email


Web

project@mosem.no


www.mosem.eu

www.supercomet.eu


PARTNER:

AMSTEL Institute, Universiteit van Amsterdam

(NL)




AUTHOR:

Peter Uylings

DATE:

2010
-
02
-
02


REVIEWER:

Reviewer name

DATE:

yyyy
-
mm
-
dd


Superconductivity at Bonhoeffercollege, Castricum


VERSION:

1


High Tech Kit Experiments at secondary school

Bonhoeffercollege, Castricum, Netherlands is a secondary school of about 14
5
0 pupils for higher pre
-
vocational and pre
-
university study. The school has a highly exact profile, being one of nat
ional
vanguard science schools.
Bonhoeffercollege is partner of

the SuperComet 2 and Mosem2 projects
,
both part of the SUPERCOMET Project Family
.

Two groups of p
upils of the age of
17 have tested
a large number of experimen
ts of
the
High Tech Kit
developed in the course
of the Mosem project. The

High Tech Kit
experim
ents focus on various
exciting
aspects of superconductivity

and are especially designed to illustrate these phenomena at a
senior high school or junior university level.
It may easily have been the first time ever in the world
th
at students of this age
in
dependently work

with superconduction at a quantitative, semi
-
quantitative
and qualitative demonstration level.
It not only proved that these experiments can be performed at
school without the need of a sophisticated but highly inaccessible university labo
ratory environment,
but also without the supervision of a university expert: at the two experimental afternoon sessions,
only the students and the school technical assistant were present.


Preparation: instructed technical assistant and liquid hydrogen

Tue
sday December 1 2009, Wim Peeters (Ponton, Belgium) and a university technical assistant (DPB
Antwerpen) brought a MOSEM High Tech Kit to Castricum, meeting the school technical assistan
t

Arie
Moor.

Together, they went through the experiments using the MO2_PM05_Ostrava_videofile_timecode.wmv
as a guide. The High Tech Kit was left behind in Castricum, and two afternoons for the two groups of
pupils were scheduled in January.
A

small delay
was involved
as one of the contacts in the
temperature sensor had to be repaired.
A neighboring technical firm supplied the required liquid
hydrogen, to be collected in the Dewar from the High Tech Kit. This proved to be enough preparation
and now
everything is
ready t
o go.

Doctype

MOSEM Project

LLP
-
LdV
-
TOI
-
2007
-
NO/165.009



Page
2

of
3

Printed
2013
-
11
-
16


MOSEM Contractor

Simplicatus AS

P.O. Box 27

NO
-
2006 Løvenstad

Vegard Engstrøm


Phone +47

9118 8774

Fax +47 6300 2933

MOSEM Coordinator

University of Torun

Grudziadzka 5

PL
-
87
-
100 Torun

Grzegorz Karwasz


Phone +48 566

112 407

Fax +48 566 225 397

Email


Web

project@mosem.no


www.mosem.eu

www.supercomet.eu


Resistance versus temperature measurements

With the sensors and the supplied software from the Kit, Resistance versus temperature
measurements were performed both with a traditional conductor (copper) and a
cuprate
superconductor. As shown in the
b
elow
pictures
,

measurements were taken both cooling and heating
the sample
, demonstrating a kind of hysteresis which has probably to do with the temperature
adjustment velocity of the sensor
.

Doctype

MOSEM Project

LLP
-
LdV
-
TOI
-
2007
-
NO/165.009



Page
3

of
3

Printed
2013
-
11
-
16


MOSEM Contractor

Simplicatus AS

P.O. Box 27

NO
-
2006 Løvenstad

Vegard Engstrøm


Phone +47

9118 8774

Fax +47 6300 2933

MOSEM Coordinator

University of Torun

Grudziadzka 5

PL
-
87
-
100 Torun

Grzegorz Karwasz


Phone +48 566

112 407

Fax +48 566 225 397

Email


Web

project@mosem.no


www.mosem.eu

www.supercomet.eu


Levitation

In the levitation experiments, height, pinning

and
rotation and their inertial properties were
investigated, see picture:

Eternal current and magnetic field

When a ring superconductor is suddenly detached
from a magnetic field, the induced current will
persist in the superconductor “forever”, i.e. as

long as the ring remains cooled below its critical
temperature. This spectacular phenomenon

was
demonstrated with a Hall sensor as well.


Magnetic Levitation (MagLev) train

As a particular

icing of the cake, students were able to
see a (polystyrene foam) train
moving while
hovering above a rails composed of three parallel strips (with alternating magnetic poles) of strong
neodymium magnets.
In the picture, the nose of the train is 90 degrees off. The students discovered
themselves
that the
positioning
of
the train
magnets determines the direction of the train and
corrected it. Next, they had the levitating train moving above the rails at quite an impressive speed
and video taped it! To them, and to all of their peer students and

the
ir

parents they showed and
explained their video
to
the next evening, this was an exciting and motivating experience.

Many
people
even without any science background
seem to be intrigued by this macroscopic quantum
phenomenon that
works such counterintuiti
ve magic.


Theoretical explanations

It would be worthwhile to provide a short elementary theoretical explanation for each of the individual
experiments along with the Kit. This will avoid the High Tech Kit becoming just a magical box: nice
and fascinating phenomena without understanding or
theoretical background.