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Defense Intelligence Reference Document Inertial Electrostatic Confinement Fusion

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This Defense Intelligence Agency reference document, dated 10 March 2010, covers inertial electrostatic confinement (IEC) fusion. It was produced in FY 2009 under the DIA's Advanced Aerospace Weapon System Applications (AAWSA) program. The report focuses on work at the University of Illinois Urbana-Champaign and reviews IEC basics, experiments, theory and applications such as neutron sources, explosives detection and space propulsion. It concludes by proposing a breakeven experiment for p-11B fusion that uses a hydrogen plasma simulation.

  • p. 8 …This is important for long run times since 10n bombardment of the grids, hence grid wire…
  • p. 9 …This time can be restated in terms of the number of ion recirculations in the IEC…
  • p. 15 …This work and others on the small gridded systems at that time showed several important problems…
  • p. 17 …interesting concept is the idea of ion focusing, either in space or time, or some other…
  • p. 18 …confinement time for aneutronic fusion. This assumes, however, very precise control is maintained over the energy…
  • p. 23 …By selecting the pulse width to match or exceed the ion confinement time, typically order of…
  • p. 27 …This is the approach used at the UIUC. However, introduction of the source into the configuration…
  • p. 30 …The second jet would serve the integration purpose of the platform without having to expend time…
  • p. 35 …The issue then is how to achieve adequate confinement times. The approach being pursued at UIUC…
  • p. 36 …step in a timely fashion, however. The Dipole Assisted IEC (DaIEC) The dipole assisted IEC DaIEC…
  • p. 38 …in the current experiment. It is found that electron density increases about 17 times more than…
  • p. 41 …Namely, the time scale for collisional degradation of the beam-like ion distribution function is crucial…
  • p. 42 …would homogenize the speed within the ion beam a~er some time, making the speed difference…
  • p. 43 …1) The electrostatic well is deep enough (Eo > 100 kV); 2) Ion confinement time is long…
  • p. 44 …The source to sink issue noted several times here can be explained as follows. Two opposite…
  • p. 49 …The time convergence test suggests that employing the largest time step compatible with accuracy in a…
  • p. 50 …When an ion beam is hot, the waves excited by the instability are ion acoustic type…
  • p. 51 …used an analytical model of charge- exchange collisions in the IEC plasma to include ion time…
  • p. 53 …Nevins, Can inertial electrostatic confinement work beyond the ion-ion collisional time scale?" Phys. Plasmas, Vol…
  • p. 54 …This method uses a pulsed high-energy neutron source and the time-of-flight (TOF) diagnostics…
  • p. 57 …The longer the charge time, the higher the charge in the energy storage capacitor bank and…
  • p. 58 …The challenge in these systems is that the unloading time is short and the container is…
  • p. 59 …by the number of detectors, the detector configuration, the collimated beam size, the acquisition time, and…
  • p. 62 …The Tokamak has a shorter trip time by employing a power level that is six times…
  • p. 63 …In this fashion, an array of multiple IECs increase the overall confinement time roughly in proportion…
  • p. 64 …This recirculation significantly increases the confinement time verses that of a simple cusp devise, leading to…
  • p. 65 …This re-trapping greatly increases the confinement time of a MCSA fusion device. 58 UNCLASSIFIED/;CEiOAt…
  • p. 66 …in the IEC high power-to-weight of the MCSA enables fast trip times. The concept…
  • p. 67 …across the outer surface, so increased confinement times have been achieved by going to the massively…
  • p. 68 …Here n is the ion density and Tis the ion confinement time. Assuming the converged core…
  • p. 69 …A specially designed radio frequency (RF) ion gun is installed on the side of the chamber…
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In summary, if the physics principles
are demonstrated successfully, the
MCSA fusion power plant will offer
numerous advantages for space
propulsion as well as for terrestrial
power sources. The non-Maxwellian
plasma involved is well suited for
operation with D- 3He fuel that provides
much of the energy output in the form
of very energetic 14-MeV protons.
Proton energy can be employed for
either direct conversion to electricity or
directed thrust. As demonstrated in the
Fusion Ship II design study, the MCSA
power plant is especially well suited for
manned deep space missions where the
hid~..,;,,,
Entennla'
\
Figure 5.10. Diagram of Direction Randomization
(KAM effect) Due to the Magnetic Field Null Region
in the IEC
high power-to-weight of the MCSA enables fast trip times. The concept introduces
several important new physics. The basic concept of the MCSA system is use of
recirculation from escaping particles from one unit into the neighboring one where
retrapping occurs. These physical principles have not yet been demonstrated
experimentally, but formulated initial tests could be done with a modest size
experiment and stepped up in size to eventually demonstrate a full-scale prototype
power unit.
CONCLUDING REMARKS
This section has concentrated on various near-term "spin off" applications of
neutron/proton/x-ray sources and also non-electrical power applications such as space
propulsion. The homeland security inspection station described here show how versatile
the IEC concept is, allowing mufti-device broad area inspection. Space propulsion and
related space power seems quite far term due to the large size powers demanded for
such applications. However, the possibility of using magnetic coupling of smaller unit
provides a modular approach that has many advantages, plus expediting development
by allowing concentration on the smaller modules. In addition, use of near-tern
electrically driven IEC jet plasma devices allows a "product" along the way to the
eventual development of the high power fusion devices.
REFERENCES
5.1 G. H. Miley, L. Wu, H.J. Kim, Nuclear Techniques in National Security Studies on
Contraband Detections IEC-based neutron generator for security inspection system",
Journal of Radioanalytical and Nuclear Chemistry, Vol. 263, No. 1 (2005) pp.159-
164.
5.2 R. Burton, H. Momota, N. Richardson, Y. Shaban, and G. H. Miley, "Fusion Ship
59
II- A Fast Manned Interplanetary Space Vehicle Using Inertial Electrostatic Fusion",
Space Technology and Applications International Forum - STAIF-2003, Albuquerque,
NM, 654, Feb 2-5 (2003) (M.S. EI-Genk, ed.), American Institute of Physics Conf.
Proceedings, pp. 553-562.
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Report, from the dia collection. The PDF is mirrored here; the original link is under it. 72 pages are in the text index: search them above, or from the library's search.