Efficiencies of rechargeable batteries
Students are introduced to the basic principles of computer controlled
experiments and the physics and chemistry of batteries.
Computer controlled test equipment and computers will be used in the
construction of a test station for rechargeable batteries.
The computer will control the continuous charging as discharge processes
under various load conditions (radios, electric motors etc) for several
weeks or till failure of the battery.
Cost effiencies of the batteries will be determent
Radiation Physics
We are continuously bombarded by radiation from both man-made and natural
sources. Natural sources of radiation include cosmic rays from outer space,
background radiation from natural radioactive elements as well as radon
produced by the radioactive decay of uranium.
In this project, we will investigate the different types of nuclear radiation
and their properties. Experiments will include different techniques for
detecting radiation and illustrating the properties of the different types
of radiation. Theoretical aspects include radiation safety, biological
effects of radiation and the mathematics of radioactive decay.
Study of materials with scanning(SEM), transmission(TEM) electron microscopes,
Auger electron spectroscope (AES) and Raman spectroscopy.
Many materials, like for example metals, are typically composed of a
collection of very small crystallites. The nature and size of these crystallites,
as well as the way in which they are arranged and the defects inside
them, have a determining effect on the mechanical, electrical and many
other physical properties of the material.
In this project a few of the methods, which can be used to prepare materials
so that the crystal structure and defects can be observed, will be applied.
Electropolishing techniques will be used to prepare metal samples so
that by using optical and scanning electron microscopes (SEM) we can
observe the crystals. The effect of heat treatment on the microstructure
and mechanical properties (hardness) will be investigated. This will
be measured by using a microhardness tester. Vacuum deposition techniques
will also be applied to prepare very thin films of a metal. A transmission
electron microscope (TEM) will be used at magnifications of 100000X and
more to examine the crystallites and defects in the crystals. The sticking
of impurities to the surface will be investigated by Auger electron spectroscopy
and by the optical technique, Raman spectroscopy, which employs a high
intensity laser. |