The work and the presenation involves George H Miley who has been producing research in all aspects of nuclear fusion including dense plasma focus fusion, IEC fusion, laser fusion and cold fusion.
Dense Plasma Fusion for Space
* Ideally suited for p-B11 – High density pinch plasma and no B field induced radiation loses
* Can provide the necessary exhaust velocity; Specific Impulse from 2000 second to million second ISP, trading off lower values with higher thrust
* Can provide the necessary specific energy: ~ 100 times higher than conventional chemical systems
* Fusion Propulsion is one of the main options for deep space propulsion
* Of the various fusion propulsion schemes,the DPF, initially using D-He3, then p-B11 is an outstanding option.
* Much R&D is needed, but compared to the present DOE terrestrial fusion power programs, the DPF development would be cheaper and faster. Also, there are intermediate uses possible, including as a neutron source and for a light source for semiconductor mfg
* Fine structure fusion dominates giving high Ti/Te ratio
* Pinch lifetimes, can be extended an order of magnitude longer than present experimental values
* Fusion fuel and charged fusion products are confined during entire pinch
* Refection of Bremsstrahlung above 50%
The assumptions lead to :
* For 500 kN, 2000 sec Isp p-B11 DPF, the required pulse power, energy, and voltage are:
Power 800 Megawatts
W = 80 megajoules
Vo = 400 kilovolts
Q = 3.07
Physics Issues from 2005 Study
Physics Issues Ascertained From Study:
* Investigation of achieving a high Ti/Te
* Methods of increasing pinch lifetime
* Reflection of Bremsstrahlung
* Direct energy conversion of plasma; e.g. B field penetration
A Recent Study of Key p-B11 Issue by R. Thomas EAFB- Bremsstrahlung Control
* Investigate reflection physics for high energy Bremsstrahlung radiation emission during p-11 B fusion
* Identifies 2 potential approaches – Hohlraum Cavities and Super Multilayers
For 500 kN Thrust Level, ~ 10 µm of Reflector Material Ablated per Day (10 Hz Pulsed Continuously)
Proposes – Filament DPF. Filament DPF simulates the Sandia Labs “Z Machine”, but is much more compact
Brian Wang is a Futurist Thought Leader and a popular Science blogger with 1 million readers per month. His blog Nextbigfuture.com is ranked #1 Science News Blog. It covers many disruptive technology and trends including Space, Robotics, Artificial Intelligence, Medicine, Anti-aging Biotechnology, and Nanotechnology.
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