EISCAT observations of pump-enhanced plasma temperature and optical emission excitation rate as a function of power flux
[1] We analyze optical emissions and enhanced electron temperatures induced by high power HF radio waves as a function of power flux using the EISCAT heater with a range of effective radiated powers. The UHF radar was used to measure the electron temperatures and densities. The Digital All Sky Image...
Main Authors: | , , , , |
---|---|
Format: | Other Non-Article Part of Journal/Newspaper |
Language: | unknown |
Published: |
2012
|
Subjects: | |
Online Access: | https://figshare.com/articles/journal_contribution/EISCAT_observations_of_pump-enhanced_plasma_temperature_and_optical_emission_excitation_rate_as_a_function_of_power_flux/10109756 |
id |
ftleicesterunfig:oai:figshare.com:article/10109756 |
---|---|
record_format |
openpolar |
spelling |
ftleicesterunfig:oai:figshare.com:article/10109756 2023-05-15T16:04:31+02:00 EISCAT observations of pump-enhanced plasma temperature and optical emission excitation rate as a function of power flux CJ. Bryers M. J. Kosch A. Senior M. T. Rietveld T. K. Yeoman 2012-09-06T00:00:00Z https://figshare.com/articles/journal_contribution/EISCAT_observations_of_pump-enhanced_plasma_temperature_and_optical_emission_excitation_rate_as_a_function_of_power_flux/10109756 unknown 2381/13981 https://figshare.com/articles/journal_contribution/EISCAT_observations_of_pump-enhanced_plasma_temperature_and_optical_emission_excitation_rate_as_a_function_of_power_flux/10109756 All Rights Reserved Uncategorized IR content Text Journal contribution 2012 ftleicesterunfig 2021-11-11T20:05:59Z [1] We analyze optical emissions and enhanced electron temperatures induced by high power HF radio waves as a function of power flux using the EISCAT heater with a range of effective radiated powers. The UHF radar was used to measure the electron temperatures and densities. The Digital All Sky Imager was used to record the 630.0 nm optical emission intensities. We quantify the HF flux loss due to self-absorption in the D-region (typically 3–11 dB) and refraction in the F-region to determine the flux which reaches the upper-hybrid resonance height. We find a quasi-linear relationship between the HF flux and both the temperature enhancement and the optical emission excitation rate with a threshold at ∼37.5 μWm−2. On average ∼70% of the HF flux at the upper-hybrid resonance height goes in to heating the electrons for fluxes above the threshold compared to ∼40% for fluxes below the threshold. Other Non-Article Part of Journal/Newspaper EISCAT University of Leicester: Figshare |
institution |
Open Polar |
collection |
University of Leicester: Figshare |
op_collection_id |
ftleicesterunfig |
language |
unknown |
topic |
Uncategorized IR content |
spellingShingle |
Uncategorized IR content CJ. Bryers M. J. Kosch A. Senior M. T. Rietveld T. K. Yeoman EISCAT observations of pump-enhanced plasma temperature and optical emission excitation rate as a function of power flux |
topic_facet |
Uncategorized IR content |
description |
[1] We analyze optical emissions and enhanced electron temperatures induced by high power HF radio waves as a function of power flux using the EISCAT heater with a range of effective radiated powers. The UHF radar was used to measure the electron temperatures and densities. The Digital All Sky Imager was used to record the 630.0 nm optical emission intensities. We quantify the HF flux loss due to self-absorption in the D-region (typically 3–11 dB) and refraction in the F-region to determine the flux which reaches the upper-hybrid resonance height. We find a quasi-linear relationship between the HF flux and both the temperature enhancement and the optical emission excitation rate with a threshold at ∼37.5 μWm−2. On average ∼70% of the HF flux at the upper-hybrid resonance height goes in to heating the electrons for fluxes above the threshold compared to ∼40% for fluxes below the threshold. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
CJ. Bryers M. J. Kosch A. Senior M. T. Rietveld T. K. Yeoman |
author_facet |
CJ. Bryers M. J. Kosch A. Senior M. T. Rietveld T. K. Yeoman |
author_sort |
CJ. Bryers |
title |
EISCAT observations of pump-enhanced plasma temperature and optical emission excitation rate as a function of power flux |
title_short |
EISCAT observations of pump-enhanced plasma temperature and optical emission excitation rate as a function of power flux |
title_full |
EISCAT observations of pump-enhanced plasma temperature and optical emission excitation rate as a function of power flux |
title_fullStr |
EISCAT observations of pump-enhanced plasma temperature and optical emission excitation rate as a function of power flux |
title_full_unstemmed |
EISCAT observations of pump-enhanced plasma temperature and optical emission excitation rate as a function of power flux |
title_sort |
eiscat observations of pump-enhanced plasma temperature and optical emission excitation rate as a function of power flux |
publishDate |
2012 |
url |
https://figshare.com/articles/journal_contribution/EISCAT_observations_of_pump-enhanced_plasma_temperature_and_optical_emission_excitation_rate_as_a_function_of_power_flux/10109756 |
genre |
EISCAT |
genre_facet |
EISCAT |
op_relation |
2381/13981 https://figshare.com/articles/journal_contribution/EISCAT_observations_of_pump-enhanced_plasma_temperature_and_optical_emission_excitation_rate_as_a_function_of_power_flux/10109756 |
op_rights |
All Rights Reserved |
_version_ |
1766400099580116992 |