Kann mir Jemand, der Ahnung von Physik hat und englisch kann den folgenden Satz übersetzen?

The voltage, which is periodic in Psi0, is

used to provide a feedback current that nulls the flux penetrating

the SQUID loop.

Das ist der entscheidende Satz, der mir erklärt wo die gemessenen Spannung her kommt. Da ist es wichtig, wie ist provide übersetze. Ob der Feedback Strom jetzt induziert wird oder irgendwie anders entsteht.

Der gesamte Textabschnitt lautet:

Like the rf SQUID Fig. 11, the input, feedback, and modulation

coils are not wound around the SQUID loop, but inductively

coupled to it. It is biased with a dc current approximately

equal to twice Ic and develops a dc voltage across the

junctions and shunt resistors. A change in the magnetic flux

applied through the SQUID loop induces a wave function

phase change that enhances the current through one Josephson

junction Itotal=Ib+IscreenIc and reduces the current

through the other Itotal=Ib−Iscreen   Ic. As the external flux

ext increases or decreases, the voltage will change in a

periodic manner with the period being that of the flux quantum

Psi0 Fig. 7b. The voltage, which is periodic in Psi0, is

used to provide a feedback current that nulls the flux penetrating

the SQUID loop. Like the rf SQUID, this feedback

FIG. 12. Triangle pattern showing detected output rf voltage vs flux

coupled into the SQUID.

FIG. 13. Color online Block diagram of a typical dc SQUID. The detection

coil connected to the input coil is omitted for clarity.

101101-7 SQUID instruments and applications Rev. Sci. Instrum. 77, 101101 2006

current presented as a voltage at the output is a direct measure

of changes in flux applied to the SQUID. Unlike the rf

SQUID Fig. 12, the V- curve is sinusoidal in nature.

Similar to rf SQUIDs Sec. III A 1, open loop operation

allows significantly greater bandwidths for small amplitude

signals. Additional details on the operation of dc SQUIDs

may be found in Ref. 23. The dc SQUID typically requires at

least four pairs of leads bias, modulation, signal, and feedback

 between the SQUID and its electronics. A heater circuit

to momentarily drive the temperature of the SQUID

above Tc is useful to remove trapped flux.

Das vor und nach dem Satz versteh ich, aber ich versteh nicht wie man jetzt von dem periodischen Spannungsverlauf über die Josephson-Kontakte zu einer Spannung in der Feedback Schlaufe kommt, welche direkt mit dem externen Fluss zusammenhängt.

Englisch, Strom, Messgerät, Übersetzung, Spannung, Induktion, Physik, Supraleiter
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