Semiconductors and Tubes
PIRA classification 5M
Grayed Demos are either not available or haven't been built yet. |
Please note that these tables have not yet been edited to match the equipment that is available within the UW-Madison lecture demo lab. There maybe many items listed within these tables that we either "can not do" or have available.
5M10. Semiconductors
PIRA # |
Demonstration Name |
Abstract |
5M10.10 |
Hall voltage |
Measure the transverse potential of a large rectangle of biased N-doped germanium in a magnetic field. |
5M10.10 |
Hall effect |
The transverse potential of a large rectangle of biased N-doped germanium is measured when inserted into a magnetic field. |
5M10.10 |
Hall voltage |
Current is passed through a N doped germanium crystal while in a strong magnetic field and the voltage at the sides is monitored. |
5M10.10 |
Hall effect |
Measure a voltage difference in a germanium sample perpendicular to the current flow when placed in a magnetic field. Picture Diagram, Construction details in appendix, p.1367. |
5M10.10 |
Hall effect |
A Hall effect probe in a magnet, animation. |
5M10.11 |
Hall effect magnet |
Apparatus Drawings Project No. 12: A small electromagnet for use with an indium-antimonide device. |
5M10.12 |
Lorentz force on conduction electron |
A voltage is induced on a moving metal in a magnetic field. |
5M10.15 |
an electron in a periodic potential |
The interaction of an electron with a crystal periodic potential is demonstrated with an air track cart mounted magnet moving past a magnet array. |
5M10.19 |
model of a semiconductor |
A model made of pegboard and balls that shows a hole moving along a preselected path. |
5M10.20 |
hot point probe |
A hot point probe consisting of a soldering iron and a microammeter tests for the two types of conductivity. |
5M10.30 |
color centers |
Electrons or holes are injected into a large transparent alkali halide crystal in an oven resulting in the formation of color centers. Pictures, Diagrams, References: AJP 25,5 ,306. |
5M10.32 |
color centers |
Injection of electrons into a transparent potassium chloride crystal at high temperatures results in the formation of color centers. Pictures. |
5M10.34 |
Shockley-Haynes experiment |
A difficult but worthwhile demonstration illustrates diffusion and drift phenomena. |
5M10.40 |
Josephson weak link model |
A rigid pendulum and aluminum disc are mounted on a shaft driven by a weight hanging on a thread wrapped around the shaft and damped by eddy currents. |
5M10.50 |
diode |
Positive and negative voltages are applied to a lamp in series with a diode. |
5M10.60 |
PN junction |
Demonstrate a PN junction with a battery. |
5M10.61 |
transistor curve tracer |
Circuits for constructing instruments to display transistor curves on an oscilloscope. |
5M10.62 |
Fermi level model |
A model with ball bearings representing electrons and holes in Plexiglas representing states. |
5M10.70 |
brillouin |
View a waveform on an oscilloscope through a cardboard with slots cut out. |
5M10.71 |
brillouin/compass array |
|
5M10.90 |
transistor amplifier |
|
5M10.90 |
transistor amplifier |
A transistor circuit board shows simple amplification. |
5M10.92 |
integrated circuits |
Show transistors and integrated circuits including slides of integrated circuit blow ups. |
5M20. Tubes
PIRA # |
Demonstration Name |
Abstract |
5M20.10 |
glow discharge |
Various discharge phenomena are described from atmospheric to high vacuum. |
5M20.10 |
glow-discharge tube |
The pressure is reduced on a large tube while high voltage dc is applied to the electrodes. |
5M20.10 |
gaseous discharge tube |
Pump down a long discharge tube to show Crookes' dark space, negative glow, Faraday dark space, striations, etc. |
5M20.12 |
potential required for glow discharg |
Show the minimum voltage for a neon glow tube to discharge. |
5M20.15 |
thermionic effect |
Use a tube to show the thermionic effect in a vacuum. |
5M20.20 |
special-purpose discharge tubes |
Gas discharge tubes for spectra, fluorescence of minerals, line tubes, paddle wheel, etc. are mentioned. |
5M20.20 |
five cathode ray tubes |
Special tubes that demonstrate five properties of cathode rays. |
5M20.25 |
electron beams |
A tube with a replaceable lime spot (or barium, strontium, and calcium oxides) hot cathode gives a brilliant beam. Diagram. |
5M20.28 |
electron focusing |
Three types of focusing of the beam: residual gas, electrostatic, and magnetic. |
5M20.30 |
gas filled tubes - two element type |
A circuit for demonstrating the mercury-vapor rectifier tube. |
5M20.31 |
hot-cathode discharges |
The Tungar rectifier bulb and the phanotron mercury-vapor rectifier illustrate the role of cathode emission in discharge. |
5M20.32 |
diode tubes |
The Welch demonstration power supply board is used to explain the theory of the diode tube. |
5M20.35 |
thyratron tube |
The function of the grid in a discharge tube is shown with a thyratron. |
5M20.36 |
gas filled tubes - grid controlled |
A circuit for demonstrating the thyratron tube. |
5M20.40 |
three element tube curves |
A circuit for obtaining the characteristic curves of a triode. |
5M20.41 |
"fresh air three electrode tube" |
Elements of a three electrode tube are placed in a bell jar. |
5M20.42 |
three electrode tube model |
Steel balls represent electrons in a mechanical model of a triode. Picture. |
5M20.43 |
three element tube - electrostatic |
A circuit for controlling the plate current of a three or four element tube. |
5M20.44 |
the triode |
A circuit for demonstration the principles of a triode tube. Reference: AJP 23(9),384. |
5M20.46 |
triode demonstrator unit |
Apparatus review of the Modern and Classical Instruments triode demonstrator board. (1961) |
5M20.50 |
soap bubble model of tubes |
Soap bubbles moving through plates connected to a Van de Graaff generator simulate behavior of electron tubes. Picture. |