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1. HIGH VOLTAGE
ENGINEERING
BREAKDOWN IN
GASES
STREAMER
THEORY
IN SIMPLE
LAUNGUAGE
LEC # 07

2. STREAMER THEORY OF BREAKDOWN IN GASES
Study of a “Streamers Theory”
STREAMER THEORY of breakdown
mainly arises due to the added effect
of the space- charge field of an
avalanche and photo-electric
ionization in the gas volume.
But in practice, breakdown voltages
were found to depend on the gas
pressure and the geometry of the
gap.

3. PROPERTIES OF STREAMER THEORY
 Streamer breakdown is also
called avalanche breakdown
 It is current multiplication at
high voltage
 It has non uniform electric field
 It has finger like structure
 Positive streamer & negative
streamers
 They are transient in nature

4. AVALANCHE
OCCURS
IONIZATION
TAKES PLACE
ELECTRIC FIRLD
INCRESES
HIGH VOLTAGE SPACE CHARGE
IONISED
HOW STREAMER THEORY TAKES PLACE ?
AVALANCHE
GROWTH
INCREASES
STREAMERS
FORMS
MORE FREE
IONS FORM

5. APPLICATION OF STREAMER THEORY
 O3 OZONE GAS PRODUCTION
 PLASMA MEDICINEAIR & WATER PURIFICATION