quantum

Superconducting Quantum Interference Devices (SQUIDs)

Student Manual

In this experiment we will use the Superconducting Quantum Interference Device (SQUID) that helps us develop an idea of superconductivity. With SQUID we can observe various interesting quantum mechanical effects such as flux quantization, quantum interference and quantum mechanical tunneling at the macroscopic level. We will also use the SQUID as a magnetometer capable of sensing extremely small magnetic fields.

Sample ResultsVoltage-Current characteristics
Voltage-Flux characteristics
Superconducting transition
R-T graph for Mr. SQUID’s chip
Mr. SQUID as a Magnetometer
Hardware ManualSquid’s User Manual
Experiment Code2.4
Version6 April 2010

Further Readings and References


Pictorial Procedure

P1020050FLLSetupviSuper_transitionVicurve

DETAIL

Electron Energy Loss Investigation through the Nobel Prize Winning Franck-Hertz Experiment

Student Manual

Franck-Hertz experiment is a profound way of looking at the quantization of energy levels in an atom. A triode tube filled with mercury vapors is employed to accelerate electrons that in turn excite mercury atoms and energy transfer can be observed only for certain discrete values of energy of the colliding electrons. This implies that energy transfer to and from an atom can only be in fixed amounts, and hence a discrete atomic structure.

Sample ResultsFranck Hertz Plots at different temperatures
Experiment Code1.13
Version15 May 2015, 2015-v1

Further Readings and References


Pictorial Procedure

1. Connecting control unit to the tube.

1. Connecting control unit to the tube.

2. Connecting control unit to the tube.

2. Connecting control unit to the tube.

3. Connecting the outputs to the scope.

3. Connecting the outputs to the scope.

4. Temperature measurement.

4. Temperature measurement.

Observations in Comsoft.

Observations in Comsoft.

DETAIL

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