مورد إلكتروني
An Artificial Particle Precipitation Technique Using HAARP-Generated VLF Waves
| العنوان: | An Artificial Particle Precipitation Technique Using HAARP-Generated VLF Waves |
|---|---|
| المصدر: | DTIC |
| بيانات النشر: | 2006-11-02 |
| تفاصيل مُضافة: | AIR FORCE RESEARCH LAB HANSCOM AFB MA SPACE VEHICLES DIRECTORATE Kosch, M. J. Pedersen, T. Bortnik, J. Esposito, R. Gallagher, D. Marshall, R. McCarrick, M. Friedel, R. Inan, U. |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | A new ground-based experimental technique is described, which is designed to optimize artificial precipitation of magnetospheric electrons at high latitudes, due to man-made VLF waves. High-latitude ionospheric modification facilities may be used to modulate the Hall conductance, which modulates the electrojet current, and in turn radiates VLF whistler waves. Assuming the VLF waves are ducted along the magnetic field lines, the frequency of the VLF wave is modulated in time such that Doppler-shifted cyclotron resonance between the wave and gyrating electrons is maintained along a large fraction of the magnetic field line for a selected particle energy. The electron travel time is a function of particle energy, which is selected to be at the loss cone, and magnetic field strength. The VLF wave travel time is a function of frequency, which we calculate, the electron gyro-frequency, which is a function of magnetic field strength, and the plasma frequency, which we model. The frequency-time modulated VLF wave patterns have been successfully implemented at the HAARP ionospheric modification facility in Alaska, USA. Two initial attempts have failed to produce an unambiguous signature of particle precipitation to date. The original document contains color images. All DTIC reproductions will be in black and white. Supported in part by AFOSR. |
| مصطلحات الفهرس: | Meteorology, ARTIFICIAL PRECIPITATION, ELECTRONS, PARTICLES, HIGH LATITUDES, WAVES, CYCLOTRON RESONANCE, WHISTLERS, VERY LOW FREQUENCY, MAGNETOSPHERE, ELECTROJETS, IONOSPHERIC MODIFICATION, MAGNETIC FIELDS, DOPPLER EFFECT, VLF WAVES, PE62101F, PE62601F, WUAFRL2311SDA4, WUAFRL4287HRA1, Text |
| URL: | |
| الإتاحة: | Open access content. Open access content Approved for public release; distribution is unlimited. |
| ملاحظة: | text/html English |
| أرقام أخرى: | DTICE ADA521272 832082910 |
| المصدر المساهم: | From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.ocn832082910 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |