presented by: huda haddad supervisor: dr. abdalla obeidat co-advisor : dr. borhan al-biss
DESCRIPTION
Studying Magnetotransport Properties of Superconductors Using LabVIEW دراسة الخواص الكهربائية و المغناطيسية للمواد فائقة الموصلية باستخدام LabVIEW برمجية. - PowerPoint PPT PresentationTRANSCRIPT
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Presented by:
Huda HaddadSupervisor:
Dr. Abdalla ObeidatCo-Advisor:
Dr. Borhan Al-biss
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Zero resistivitydiscovered by H. Kammerlingh Onnes in
1911•transmission of current at any distance with no losses.
•production of large magnetic fields. •storage of energy.
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•Critical temperature Tc .
•Critical current density Jc .
•Critical magentic field Hc .
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Types of supercondctors Type-I (perfect
diamagnetism, Meissner state)
type-II
Diamagnetic It causes a magnet
to levitate above a superconductor
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isotope effect in superconductors by Maxwell (1950)
Josephson effect (tunneling effect) (1962)
Bardeen-Cooper-Schriefer (BSC theory) (1965)
Until 1986, the highest Tc observed for any superconductor was only 23.2 K in an alloy of niobium, aluminium and germanium
synthesis of rare-earth metal oxides with the discovery of the YBa2Cu3O7 (YBCO) (1987) Tc of 93 K
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Transmission Line Electric Motors High Temperature Superconductor Transformers Super Fast Computer Chips Levitation Superconducting Magnetic Energy Storage
Devices (SMES) Magnetic Levitation Vehicles Superconducting Magnets Power Electronics Magnetic field Sensors Superconducting Quantum Interference Devices
(SQUID) High Temperature Superconductor Filters
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Laboratory Virtual Instrument Engineering Workbench
LabView is a graphical programming language by NI
LabView used to automate data acquisition in research labs and industry
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LabVIEW programs are called virtual instruments or Vis.
because their appearance and operation imitate physical instruments, such as oscilloscopes and multimeters.
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• Arbitrary Waveform Generator (ARB)• Bode Analyzer• Digital Reader• Digital Writer• Digital Multimeter (DMM)• Dynamic Signal Analyzer (DSA)• Function Generator (FGEN)• Impedance Analyzer• Oscilloscope (Scope)
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Pin Symbol Description Pin Symbol Description
1 DIO 1 Data Input/Output Line 1
13 DIO 5 Data Input/Output Line 5
2 DIO 2 Data Input/Output Line 2
14 DIO 6 Data Input/Output Line 6
3 DIO 3 Data Input/Output Line 3
15 DIO 7 Data Input/Output Line 7
4 DIO 4 Data Input/Output Line 4
16 DIO 8 Data Input/Output Line 8
5 EOI End Or Identify 17 REN Remote Enable
6 DAV Data Valid 18 GND 6 Ground Wire – Twisted pai
7 NRFD Not Ready For Data 19 GND 7 Ground Wire – Twisted pai
8 NDAC Not Data Accepted 20 GND 8 Ground Wire – Twisted pai
9 IFC Interface Clear 21 GND 9 Ground Wire – Twisted pai
10 SRQ Service Request 22 GND 10
Ground Wire – Twisted pai
11 ATN Attention 23 GND 11
Ground Wire – Twisted pai
12 SHIELD Cable Shield 24 GND Logic Ground
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A maximum separation of four meters between any two devices
an average separation of two meters over the entire bus
maximum total cable length of 20 meters No more than 15 devices connected to
each bus
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Parameters measured by Display A and Display B Display A Function Display B Function
│Z│ : Absolute value of impedance
│Y│: Absolute value of Admittance Θ (Deg / Rad) : phase angle
R : Resistance X : Reactance G : conductance B : Susceptance
Q : Quality factor
D : Dissipation factor
R : Resistance
C : Capacitance L : Inductance
G : Conductance
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Hp 4192A
GPIB –CARD
Computer
LabVIEW Program
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SourceMeter from KEITHLEY
A cryostat Digital temperature
controller from LakeShore
Electromagnet (model Oxford)
Vacuum rotary pump Current-Voltage
source (up to 20A).
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ρ = (π / ln 2)× (V/I) × t × k
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The surface of the sample was polished. The sample was placed on the cooper sample
holder
Four probes were connected to the sample surface by silver paint
The sample holder was entered inside the cryostat and the cryostat was closed tightly
The vacuum pump was turned on for one hour
or more before starting the cooling
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A current was applied by the current source manually in two directions
Liquid nitrogen was poured slowly through the fill funnel to start cooling after one hour the temperature reaches 78 K
The temperature controller was used to set the desired temperature; we waited for 10 minutes after reaching the desired temperature
At each temperature, readings are taken with current flow in each direction and the corresponding resistivity values are averaged to minimize the noise effect and the thermal voltage building
After finishing the measurements all instruments were turned off
Finally, the vacuum pump was turned off and the sample was removed out of the cryostat
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0
5
10
15
20
50 100 150 200 250 300T(K)
0
1
2
3
4
5
6
7
8
50 100 150 200 250 300T(K)
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0
2
4
6
8
10
12
70 80 90 100 110 120 130 140 150
YBCO+nano-Al2O
3
YBCO
T(K)
Tc(onset)
Tc(mid)
Tc(offset)
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1.5
2
2.5
3
3.5
4
4.5
5
5.5
0 0.2 0.4 0.6 0.8 1 1.2
I(A)
Bad Contacts
Good Contact
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0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
0 0.2 0.4 0.6 0.8 1 1.2
T= 88 KT= 83 KT=78 K
I(A)
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0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
0 0.2 0.4 0.6 0.8 1 1.2
T= 88 K
I(A)
Ic1
Ic2
Ic3
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Type of superconductor Shape of the magnet and superconductor
UF
BmU
.
AB
B
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Magnet-magnet
Magnet-pure SC
Magnet-nano-AL2O3
doped YBCO with cylindrical shape(radius = 10 mm, height = 2 mm)
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0
50
100
150
200
250
300
350
400
0 5 10 15 20 25
increasing distancedecreasing distance
Z(mm)
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0
1
2
3
4
5
0 5 10 15 20 25
increasing distancedecreasing distance
Z(mm)
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0
10
20
30
40
50
0 5 10 15 20 25
decreasing distanceincreasing distance
Z(mm)
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LabVIEW used in SC, LFIA, ELVIS SC (R-T, I-V) Levitation (Mag-Mag), (Mag-SC), (Mag-
nano doped in SC) Analyze data using LabVIEW Experimental control over the intranet Future work
Automation of Electromagnet Automation of sample preparation
(Furnaces) Advanced measurement for the
Magentic Levitation work
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Dr. Borhan Albiss
Dr. Abdalla Obideat Dr. Maen Gharibeh
Eng. Hazem Rashydeh
Huda Haddad
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Zero resistance and high current density electric power transmission smaller or more powerful magnets for motors generators, energy storage, medical equipment and industrial
separations Magnetic field exclusion
multi-layer electronic component miniaturization mechanism for magnetic levitation enables magnetic field containment of charged particles
Logic delays of 13 picoseconds and switching times of 9 picoseconds have been experimentally demonstrated. Through the use of basic Josephson Junctions scientists are able to make very sensitive microwave detectors, magnetometers, SQUIDs and very stable voltage sources.
MRI Super Fast Computer Chips