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Who Am I?. Thomas M. Antonsen Jr. Professor of Physics and Electrical and Computer Engineering University of Maryland College Park. How Did I Get Here?. High School Ramsey High School -1969 Ramsey, NJ College BS (Electrical Engineering) 1973 MS/PhD (Plasma Physics) 1976 Career

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Who Am I?

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Who Am I?

Thomas M. Antonsen Jr.

Professor of Physics and Electrical and Computer Engineering

University of Maryland College Park


How Did I Get Here?

High School

Ramsey High School -1969

Ramsey, NJ

College

BS (Electrical Engineering) 1973

MS/PhD (Plasma Physics) 1976

Career

Post Doc Naval Research Lab 1 year

Research Scientist (MIT 3 years)

Joined University of Maryland in 1980

1969-2011 41/42 years at a University


Plasma Physics

Plasma is the fourth state of matter (solid, liquid, gas, plasma)

Most of the visible

universe is plasma

http://FusEdWeb.pppl.gov/


Fission

Fusion

Small nuclei stick together to make a bigger one and releases energy

Fusion powers all the stars, including the Sun.

The fuel is hydrogen, but it has to be heated to millions of degrees to ignite the burn

Power plants based on fusion could supply all our electrical needs. They could also be used to generate hydrogen for fuel cell cars, thus reducing consumption of oil.


Why Fusion?

  • Fuel is inexhaustible and available to all (from water)

  • There is no CO2 emission

  • There is no danger of a runaway or a meltdown –

  • turn it off like a gas burner

  • Waste is low level and has to be monitored only for 50-100 years (Yucca Mountain is for ~10,000 years)

  • Low risk of nuclear materials proliferation - No uranium or plutonium


State of the Art

Magnetic Confinement: ITER

US-EU-Russia-Japan-India Collaboration

Will be built in Cardarache France

Completion 2016??

http://www.iter.org/

Inertial Confinement: NIF

Lawrence Livermore Lab

Under construction

Completion expected in 2008

http://www.llnl.gov/nif/

Similar program in France


Direct acceleration

limited to laser period

E

k

Intense laser pulse

B

plasma:

Plasma wave driven by force of laser pulse

Plasma Wave

Laser Pulse

Duration of pulse matched

to plasma period

Speed of wave = group

velocity of laser pulse

I=1018 W/cm2, L= 10cm DE ~ 1 GeV

Particle Acceleration Using Plasmas


How Does it Really Work?

Analogy:

Laser PulseBoat

PlasmaLake

Plasma WaveSurface Wave

ElectronsSurfer

Relativity: Small change in velocity Large change in energy

InjectionTow rope


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