High-voltage space tether for enhanced particle scattering in Van Allen belts

1999-01-01
Danilov, VV
Mirnov, VV
Ucer, D
New applications of space tethers (High-Voltage Tethered Satellite System project) are discussed in relation with ideal of an active experiment in the Earth's radiation belts. Two conducting strings are supposed to be tethered between the main satellite and two small subsatellites flying through the ERB. A large potential difference similar to 1MV is applied between the tethers by means of a generator carried on the main satellite. The tethers effectively scatter the high energy particles into loss cone of magnetic trap, providing a control of particle life time in ERB. The rigorous theory of the sheath layer formed by relatively cold plasma is developed, yielding the electric field profile,which is then used for the treatment of scattering problem. With the help of Fokker-Planck equation the average rate of particle losses, normalized per 1 km of the tether's length is found to be: (2.5 divided by 14) . 10(16) s(-1) km(-1) for electron belts and 1.8 . 10(14)divided by 2.5 . 10(20) s(-1) km(-1) for proton belts. New active experiments in space become possible under the joint realization of HVTSS and HAARP projects.
FUSION TECHNOLOGY

Suggestions

High velocity infrared thermography and numerical trajectories of solid particles in compressible gas flow
Lappa, M.; Esposito, A.; Aponte, F.; Allouis, Christophe Gerard (2019-02-01)
The use of High Velocity Infrared Thermography as a valuable alternative to other existing techniques for the visualization and tracking of solid particles transported by a gas jet has been assessed by considering different situations in terms of problem characteristic numbers (jet Reynolds and Mach numbers and Particle Stokes and gravitational Froude numbers). Particles paths have also been calculated by means of a hybrid Eulerian-Lagrangian technique under the intent to cross-validate the two (experimenta...
THE TRANSITION RADIATION DETECTOR OF THE AMS-2 EXPERIMENT
Demirköz, Melahat Bilge (2002-11-01)
The AMS magnetic spectrometer will be installed on the International Space Station ISS to measure the properties of cosmic rays in the range of 1 to 1000 GeV during a mission of three years. A Transition Radiation Detector is used in combination with an electromagnetic calorimeter to reach a rejection of 10(-6) protons against positrons up to an energy of 300 GeV. This allows to search for cosmic cold dark matter through their decay products.
Enhanced metal assisted etching method for high aspect ratio microstructures: Applications in silicon micropillar array solar cells
Baytemir, Gulsen; Çiftpınar, Emine Hande; Turan, Raşit (Elsevier BV, 2019-12-01)
A solar cell device, fabricated on high density array cylindrical pillars, enables photogenerated carrier collection in the radial direction, thus shortening the path length of the carriers reaching the junction. It also provides advantages over conventional planar junction solar cells, such as reduced surface reflectance and enhanced light trapping. In this study, highly ordered Si micropillars were fabricated by photolithography and metal assisted etching (MAE) methods. It is shown that the use of ethanol...
A Self-Powered and Area Efficient SSHI Rectifier for Piezoelectric Harvesters
Chamanian, Salar; ÇİFTCİ, BERKAY; Muhtaroglu, Ali; Külah, Haluk (2021-01-01)
This article presents an area efficient fully autonomous piezoelectric energy harvesting system to scavenge energy from periodic vibrations. Extraction rectifier utilized in the system is based on synchronized switch harvesting on inductor (SSHI) technique which enables system to outperform standard passive rectifiers. Compared to conventional SSHI circuits, enhanced SSHI (E-SSHI) system proposed in this paper uses a single low-profile external inductor in the range of mu H's to reduce overall system cost a...
High Strength Copper Alloys for Extreme Temperature Conditions
Dincer, Onur; Pehlivanoglu, Kaan M; Dericioğlu, Arcan Fehmi (null; 2016-11-25)
Having high thermal conductivity and high strength copper alloys can be used as structural material in various applications such as thrust chamber of liquid rocket engine, nuclear reactor and electromechanical launch systems requiring high heat flux transfer. To improve mechanical properties without losing the thermal conductivity precipitation and dispersion strengthening mechanism can be applied. In this paper some selected high strength copper alloys used under extreme temperature environments were discu...
Citation Formats
V. Danilov, V. Mirnov, and D. Ucer, “High-voltage space tether for enhanced particle scattering in Van Allen belts,” FUSION TECHNOLOGY, pp. 312–314, 1999, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/66964.