High Temperature Superconducting Solenoid Punch. Our Mission Make an actuator using BSSCO 2223 HTS tape from American Superconductor.

High Temperature Superconducting Solenoid Punch

Our Mission

Make an actuator using BSSCO 2223 HTS tape from American Superconductor

What is an actuator?

MEMX High Performance Steerable MicroMirrors

http://www.memx.com/products.htm

A device that converts between mechanical energy and A device that converts between mechanical energy and other formsother forms

Copper solenoidshttp://www.magnet-schultz.com/msafront2.jpg

Permanent magnet levitating over a superconductor

http://helium.ee.tut.fi/supraryhma/images/korkealla.jpg

What is a superconductor?

A material that conducts without resistanceA material that conducts without resistance Impenetrable by external magnetic fields (up Impenetrable by external magnetic fields (up

to a point)to a point) Two types: Type I and Type IITwo types: Type I and Type II Examples:Examples:

YBCO: Yttrium barium copper oxideYBCO: Yttrium barium copper oxide BSSCO 2212, 2223: (Bi,Pb)BSSCO 2212, 2223: (Bi,Pb)22SrSr22CaCa11CuCu22OOx, x,

(Bi,Pb)(Bi,Pb)22SrSr22CaCa22CuCu33OOxx

BSSCO 2223Structure

BSSCO 2223 Unit Cellhttp://www.library.uow.edu.au/adt-NWU/uploads/approved/adt-NWU20030305.113225/public/02Whole.pdf

Our HTS Tape

American Superconductor

BSSCO 2223

4 mm (W) x 0.21 mm (T)

Up to ~108 A

Critical temperature (TC) of 110 K

BSSCO 2223 Processing

BSSCO 2223: IC vs. H

Current vs. Bending Diameter

Actuator Choice

Persistent actuator? Can’t make superconducting junction

Core choice Magnetostrictive Hard magnet Soft magnet

Coil Radius Setup

Radius Measurements 2.5" Diameter Loop

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

0.16

0 20 40 60 80 100 120 140

Current (A)

Vo

ltag

e (

mV

)

The Apparatus

Field Calculations

-6 -4 -2 2 4 6

0.105

0.11

0.115

0.12

0.125

Magnetic field (tesla, cm)

Force

Magnetization of Fe: 334225 A/m

dxBMAdF

-10 -5 5 10

-75

-50

-25

25

50

75

Force (N, cm)

Apparatus Fabrication

Solenoid Assembly

Assembled Solenoid

Testing: Magnetic Field

Testing: Magnetic GradientField vs. Position

-40

-30

-20

-10

0

10

20

30

40

50

0 1 2 3 4 5Axial position (in.)

Fie

ld (

Oer

sted

)

Field Measurement Field derivative

1 amp, room temperature

Self-Field Tests

Self-Field TestsMaximum Magnetic Field vs. Current

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

0 10 20 30 40 50 60 70 80

Current (A)

Ko

ers

ted

Current TestsCritical Current for Solenoid

0

50

100

150

200

250

0 10 20 30 40 50 60 70 80

Current (A)

Vo

ltag

e (m

V)

Load Cell Setup

Force

Force vs. Displacement

-20

-10

0

10

20

30

40

50

60

70

-1 0 1 2 3 4 5 6 7

Position (in.)

Fo

rce

(N

)

Supercool

Conclusions

Copper solenoid (1.5” x 2.4”) outperforms our actuator (force), even at room temperature

Energy Density

Energy density of Supercool solenoid: 17400 J/m3

7.0 cm outer diameter 3.36 J of total energy

Energy density of 1.5” x 2.4” Cu solenoid: 16100 J/m3

Further Considerations

Commercial tape: > 135 A Colder temperature YBCO 2nd generation tape

~ 7 T at 77K

Acknowledgements

Professor Chiang Professor Vander Sande Yin-Lin Xie David Bono Ken Stone Ed Moriarty Leslie Bromberg 3.082 staff

References

YBCO second generation tape: http://www.amsuper.com/html/products/library/2g_white_paper_-_march_2004.pdf

Montgomery, D. Bruce. Solenoid Magnet Design: The Magnetic and Mechanical Aspects of Resistive and Superconducting Systems. Wiley-Interscience, New York. 1969.

Magnet-Schultz commercial Cu solenoid:http://magnet-schultz.com/newRTP24X19INT.htm