大気物理学と地球観測:ライマン・アグルの水素とデウテリウム放射の観測
Science (New York, N.Y.)
|July 13, 1984
まとめ
Spacelab 1は,上層大気圏のデウテリウムライマンアルファ放射を検出し,大気中のプロセスとオーロラ活動に関する洞察を提供しました. この研究は,地球冠状放射と陽子の相互作用に関する私たちの理解を深めます.
科学分野:
- 大気物理学 大気物理学
- スペクトロスコーピーは,スペクトロスコーピーを用います.
- エアロノミーは,エアロノミーです.
背景:
- 上層大気圏は,複雑な放出メカニズムを示しており,しばしば強力な地球冠状信号によってマスクされています.
- ライマン・アルファ放射の理解は,大気および宇宙物理学の研究にとって極めて重要です.
研究 の 目的:
- Spacelab 1のスペクトロフォトメーターを使用して上層大気圏の放射機構を調査する.
- 弱いライマン・アルファ放射を,支配的な地球冠状放射から区別する.
主な方法:
- H(2) と D(2) の吸収セルを備えたスペクトルフォトメーターを使用しました.
- 分析されたスペクトルデータを用いて,様々な大気中の排出量を特定し,定量化しました.
主要な成果:
- 110 km (330 Rayleighs) でデュテリウムライマンアルファ放射の最初の光学検出を達成しました.
- 昼と夜の両面に陽子降下を観測した.
- 磁気圏の陽子電荷交換に起因する250km以上の放射を特定しました.
結論:
- この発見は,渦の拡散係数を含む大気組成と動力学に関する新しいデータを提供します.
- 弱い排出を解決する能力を実証し,上層大気圏のリモートセンシングを進めた.
- 太陽と磁気圏の粒子と地球の大気との相互作用を理解するのに貢献した.
さらに関連する動画
14:11Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
Published on: March 29, 2016
09:41Emission Spectroscopic Boundary Layer Investigation during Ablative Material Testing in Plasmatron
Published on: June 9, 2016
関連する概念動画
02:39Emission Spectra
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
00:48¹H NMR of Labile Protons: Deuterium (²H) Substitution
This lesson illustrates the role of deuterium substitution in simplifying the NMR spectrum of compounds comprising labile protons. One method employed is the use of deuterium. Amongst the three isotopes of hydrogen, deuterium (2H) has a nucleus composed of one proton and one neutron. When the D2O solvent is added to a pure dry ethanol solution, its labile proton is substituted with deuterium.
01:29Atomic Emission Spectroscopy: Lab
AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
01:30Atomic Emission Spectroscopy: Interference
In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
01:20Atomic Emission Spectroscopy: Overview
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
01:19Escape Velocities of Gases
To escape the Earth's gravity, an object near the top of the atmosphere at an altitude of 100 km must travel away from Earth at 11.1 km/s. This speed is called the escape velocity. The temperature at which gas molecules attain the rms speed, which is equal to the escape velocity, can be estimated by using the equation for the average kinetic energy of the gas molecules. According to the kinetic theory of gas, the average kinetic energy of the gas molecules is proportional to its temperature.