SQUID system for universities

Supracon introduced a new SQUID system designed for educational purposes of universities on the 2002 conference "Kryoelektronische Bauelemente“ in Berlin.

Supracon intents to foster knowledge about SQUID technology amongst physics students.

We therefore designed an educational system - JESSY edu for practical physics courses. It serves a variety of educational purposes.

1. Handling of cryogenic liquids

To operate a SQUID system the student has to be introduced to basic guidelines of the handling of cryogenic liquides.

2. Measurement of SQUID characteristics

The system allows easy measurement of voltage-current and voltage-flux characteristics.

The student should develop an understanding of the main characteristics of a SQUID sensor and the practical use of it as current-voltage converter.
 

3. Intrinsic noise of a SQUID

Knowledge of the main parameters of a SQUID are the basis for the determination of the intrinsic flux noise and the current noise referred to the input respectively.

The noise can be measured with a spectrum analyser externally or the included software tool. The student learns about the Fourier transformation and spectrum analysing.

4. SQUID system as noise thermometer

Different resistors are placed inside the coupling coil and the noise of the whole system is measured.
The student calculates the Nyquist noise for the resistor in the coupling coil.

A comparison between the intrinsic SQUID noise and the noise of the system allows to draw a conclusion about what resistors can be used for noise thermometry.

Information to the components of SQUID Systems >>