Electron ballistics

ELECTRON BALLISTICS

1. The electron is subatomic particle.

2. It belongs to lepton particle family.

3. Negatively charged particle.

4. They revolve around nucleus.

5. Posses both wave and particle nature.

ELETRON-

BALLISTICS-

• Ballistics is the science of mechanics that deals with the launching, flight, behavior, and

effects of projectiles, especially bullets, gravity bombs, rockets, or the like; the science or

art of designing and accelerating projectiles so as to achieve a desired performance.

• BALLISTIC BODY-

A ballistic body is a body with momentum which is free to move, subject to

forces, such as the pressure of gases in a gun or a propulsive nozzle, by rifling in a barrel, by

gravity, or by air drags.

HISTORY OF BALLISTICS-

1. Stones, spears and sticks.

2. Archery.

3. Catapult.

4. Guns, rifles.

5.Present…

PRESENT TECHNOLOGY-

• HIGH CALIBER PISTOLS.

• SNIPERS.

• RIFLES.

• ICBM: INTER CONTINENTAL BALLISTIC MISSILE.

AGNI-III

ELECTRON BALLISTICS-

• Electron ballistics is a branch of electronics that deals with the

motions of free electrons or other electric particles in electric

or magnetic fields.

APPLICATIONS-

1. BEEM – Ballistic Electron Emission Spectroscopy.

2. Ballistic electron surface-emitting device.

3. Sub-100-nm negative bend resistance ballistic sensors for high

spatial resolution magnetic field detection.

BALLISTIC ELECTRON EMISSION

SPECTROSCOPY:

• BEEM is a technique for studying ballistic electron transport through a

variety of materials and material interfaces. BEEM is a three terminal

scanning tunneling microscopy (STM) technique. The most popular

interfaces to study are metal-semiconductor Schottky diodedes.

BEEM-WORKING:

1. Eelectrons are injected from a STM tip into a

grounded metal base of a Schottky diode.

2. A small fraction of these electrons will travel

ballistically through the metal to the metal-semiconductor

interface where they will encounter a Schottky barrier.

3. Those electrons with sufficient energy to surmount the Schottky barrier will be detected as

the BEEM current.

4. The atomic scale positioning capability of the STM tip gives BEEM nanometer spatial

resolution.

5. In addition, the narrow energy distribution of electrons tunneling from the STM tip gives

BEEM a high energetic resolution (about 0.02 eV).

BALLISTIC ELECTRON SURFACE-

EMITTING DEVICE:

• A ballistic electron surface-emitting device (BSD) emitter that can be used in a field

emission display (FED). The emitter being made of metallic carbon nanotubes extending

in a direction that is normal to a surface of the cathode. The carbon nanotubes are

designed so that electrons therein can experience a ballistic effect where the mean free

path between collisions is as large or larger than a length of the carbon nanotube and that

the width of the carbon nanotube being a fermi wavelength. On an opposite end of the

carbon nanotubes is a thin metal electrode layer and a thin insulating layer to protect the

carbon nanotubes from damage.

• ZUSAMMENFASSUNG(COMBINATION).

THE END

DONE BY,

ABISHEK