ppt on Electromagnetic bomb

1. RAJKIYA ENGINEERING COLLEGE
AMBEDKARNAGAR-224122
SUBMITTED TO:
Mr. Mayank Kr. Gautam (Asst. Professor)
A
TECHNICAL PRESENTATION
ON
SUBMITTED BY: Shubham Rao
ROLL NUMBER: 1473720038

2. CONTENTS
•Introduction.
•Basic Principle of E-Bomb.
•Technology Base for E-Bomb.
•Coupling Modes.
•E-Bomb Targets.
•Firing of E-Bombs.
•Defences Against E-Bombs.
•Military Applications of E-Bomb.
•Advantages and disadvantages.
•Conclusions.
•References.

3. INTRODUCTION
•The most recent war operations relied on air power and precision
guided ammunitions.
•Future campaigns will require more suitable weapons than any other
conventional weapon to achieve shock effect over large targets with
small attacking forces.
•Electromagnetic bombs (E-Bombs) can perform such a role.
•E-BOMB is weapon of electrical mass destruction that uses an intense
electromagnetic field to create a brief pulse of energy across broad
spectrum to affect electronic circuitry without affecting the humans.
•The objective is to paralyze the enemy’s communication systems as
quickly as possible.
•Potentially non lethal but is still highly destructive.

4. Basic Principle of E-Bomb
• The Electro Magnetic Pulse (EMP) effect .
• The Electromagnetic Pulse is an electromagnetic shock wave.
• This pulse of energy produces a powerful electromagnetic field
sufficiently strong to produce short lived transient voltages of
thousands of volts on exposed electrical conductors like wires, printed
circuit boards etc.
• This can cause irreversible damage to wide range of electrical and
electronic equipments particularly computers and radio or radar
devices.
• It is based on COMPTON’S effect.
• In this, gamma ray photon of EM energy knock loose electrons from
atoms which travel in downward direction.
• These(electrons) forms a current over the entire effected area.
• It interacts with Earth’s magnetic field & produces
ELECTROMAGNETIC PULSE.

6. Power supply
co-axial
capacitor
bank
battery
FCGs
Pulse
shaping
network
Vircator
tube
Microwave
antenna
Electromag
netic pulses
pediain.c
BLOCK DIAGRAM

7. Technology Base for E-Bomb
 There are two widely used technologies:
 Flux Compression Generators(FCG)
 Virtual Cathode Oscillator or Vircator

8. • Power source - Explosively pumped Flux
• Compression Generator (FCG).
• FCG transfers mechanical energy into the magnetic field
• FCG invented by Los Alamos Labs during the 1950s.
• FCG can produce tens of Mega Joules in tens to hundreds of microseconds
• Peak current of an FCG is1000 X that of a typical lightning stroke.
• Peak currents of Mega Amperes demonstrated in many experiments
Main parts of FCG include:
Armature(copper tube).
Stator(helical heavy wire coil).
Initiator(plane wave explosion lens)
Jacket(prevents disintegration due to magnetic field).
Flux Compression Generators(FCG)

9. • FCG start current is provided by an external source.
oHigh voltage capacitor bank
oMHD (magneto hydrodynamic) device
oAny device that generate mega amperes current pulse.
• When start current peaks initiator is fired to initiate explosive burn.
• Explosive pressure expands armature and creates moving short.
• Moving armature compressses a magnetic field.

11. Virtual Cathode Oscillator

12. •Electron beam is accelerated through foil or mesh anode.
•Electrons passing through anode will form a bubble of space charge
around anode.
•Under proper conditions this space charge will oscillate at micro
frequencies.
•Peak power of tens of GW for 100s of sec.
•Cheap and simple to manufacture.
Working of Virtual Cathode Oscillator

13. Front Door Coupling through antennas.
•Destroys RF semiconductor devices in transmitters and
receivers.
Back Door Coupling through power /data
cabling,telephone wiring.
•Destroys exposed semiconductor devices.
•Punches through isolation transfomers.
Coupling Modes

14.  Warhead comprises priming current source,
FCG (cascade) and Vircator tube
 Missile installations must supply 100% of
weapon priming energy from own supply
 Bomb installations - weapon can be
precharged before release from aircraft
A free fall E-bomb is more lethal than a missile borne
HPM warhead as a larger proportion of the weapon
is the warhead
Firing of E-Bombs:

15. Firing of E-Bomb

16. Fixed installations(buildings,radars etc.).
Radiating mobileshidden targets(ships,mobiles).
Non radiating mobileshidden targets.
E-Bomb Targets:

19. Aircraft Dumb bombs (free fall delivery).
GPS or satellite guided bombs.
standoff missiles.
Cruise Missiles(weight restricted to 340kg).
Firing options

20. Electronic combat:
The E-Bomb enables rapid attrition of enemy electronic assets over large
areas.
The E-Bomb offers important force multiplication effects compared to
conventional weapons.
Strategic warfare:
Economic vitals-finance and stock markets,manufacturing,petroleum are
highly vulnerable.
Military applications of E-Bomb

21. Transport infrastructure-signalling and vehicle ignition systems are
vulnerable.
Population-radio and TV receivers.
Military equipments are vulnerable.
Theatre Warfare
Offensive Counter Air operations-disable aircraft in flight,on ground and
destroy their supporting infrastructure.

22. Not lethal to humans.
Negligible collateral damage.
No mass media coverage of bombing
casualities(broadcast equipment destroyed)will reduce
threshold for the use of strategic air power and missile
forces.
ADVANTAGES

23. Means of delivering E-Bombs are difficult.
Difficulty in kill assessment.
Atmospheric propagation of pulse.
DISADVANTAGES

24. E-Bombs are weapons of electrical mass destruction.
High payoff in using E-Bombs against fundemental infrastructure
results in substantial paralysis.
Decisive advantage in the conduct of electronic combat.
E-Bombs are non lethal weapon.
The critical issues for next decade are the devolopment of E-Bombs
and hardening of infrastructure.
CONCLUSION

25. 1. The air power manuel second edition.RAAF APSC,CANBERRA,1994.
2. IEEE PULED POWER CONFERENCE,NEWYORK,1989.
3. IEEE SPECTRUM 2002,2003,2001.
4. DIGEST OF TECHNICAL PAPERES.
5. HOEBERLING G92-’ADVANCES IN VIRTUAL CATHOD
MICROWAVE SOURCES’.
REFERENCES