Compact Fusion Experiment Demonstrates Confinement of 100 keV Ions in Dense Plasma
In a breakthrough in the effort to achieve controlled fusion energy, a research team at Lawrenceville Plasma Physics, Inc. (LPP) in Middlesex, NJ, announced that they have demonstrated the confinement of ions with energies in excess of 100 keV (the equivalent of a temperature of over 1 billion degrees C) in a dense plasma. They achieved this using a compact fusion device called a dense plasma focus (DPF), which fits into a small room and confines the plasma with powerful magnetic fields produced by the currents in the plasma itself. Reaching energies over 100 keV is important in achieving a long-sought goal of fusion research—to burn hydrogen-boron fuel. Hydrogen-boron, (also known by its technical abbreviation, pB11) is considered the ideal fusion fuel, since it produces energy in the form of charged particles that can be directly converted to electricity. This could dramatically cut the cost of electricity generation and eliminate all production of radioactive waste.
The fusion energy yields achieved in these experiments are still far less than the energy used to run the machines. However, LPP hopes to make rapid progress in the coming year when the machine will be running with hydrogen–boron fuel for the first time.