Numerical Evaluation of Nonlinear Effects on the Attenuation Constant in HTS Transmission Lines by Using an Enhanced Two-Fluid Model

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UNIVERSITY

OF TRENTO

DIPARTIMENTO DI INGEGNERIA E SCIENZA DELL’INFORMAZIONE

38123 Povo – Trento (Italy), Via Sommarive 14

http://www.disi.unitn.it

NUMERICAL EVALUATION OF NONLINEAR EFFECTS ON THE

ATTENUATION CONSTANT IN HTS TRANSMISSION LINES BY

USING AN ENHANCED TWO-FLUID MODEL

S. Caorsi, M. Donelli, A. Massa, and M. Pastorino

January 2004

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(9)

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(11)

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(12)

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(13)

0

0.05

0.1

0.15

0.2

0

0.5

1 Attenuation constant

α

[dB/m]

λ

[

µ

m]

Two-fluid

Enhanced two-fluid

Bipolaron

t=0.1

t=0.8

w

d

t

s

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(14)

0

0.1

0.2

0.3

0.4

0

0.5

1 Attenuation constant

α

[dB/m]

λ

[

µ

m]

H=25 [Oe]

Second-order nonlinearity two-fluid

Third-order nonlinearity two-fluid

Second-order nonlinearity enhanced two-fluid

Third-order nonlinearity enhanced two-fluid

w

d

t

s

t = 0.1

t = 0.8

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(15)

0

0.6

1.2

1.8

2.4

0

0.5

1 Attenuation constant

α

[dB/m]

λ

[

µ

m]

H=500 [Oe]

Second-order nonlinearity two-fluid

Third-order nonlinearity two-fluid

Second-order nonlinearity enhanced two-fluid

Third-order nonlinearity enhanced two-fluid

w

d

t

s

t = 0.1

t = 0.8

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(16)

10 -4

10 -3

0

0.01

0.02 Normalized Attenuation Constant

Thikness of thin film t [

µ

m]

T=77K

Second-order nonlinearity two-fluid

Third-order nonlinearity two-fluid

Second-order nonlinearity enhanced two-fluid

Third-order nonlinearity enhanced two-fluid

w

s

t

d

H= 500 Oe

H= 25 Oe

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