Page 148 - Fundamentals of Magnetic Thermonuclear Reactor Design
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130 Fundamentals of Magnetic Thermonuclear Reactor Design
FIGURE 5.8 Normalised SC critical current density as a function of SC relative longitudinal
deformation at (A) T 4.5 K and (B) T = 6.0 K.
increase—up to values at which the SC transition to the normal state occurs—
δT′<δT the adiabatic stability criterion Tδ ′ < δ T must be met. For a 2a-thick supercon-
ducting plate, this criterion takes the following form:
δ T′ = 0 µ ja ≤ 1,
22
C
2
cT C
0
δT′δT=µ jC2a 3cTC−T ≤1, δ T 3( − T )
0
0
T 0 where с is the plate’s specific heat capacity and T is its initial temperature.
0
The adiabatic stability criterion imposes a constraint on the SC transverse
3
3
dimension. A low-temperature SC with a very low heat capacity (∼10 J/(m K)
