| Project/Area Number |
07554079
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 試験 |
|---|
| Research Field |
Space and upper atmospheric physics
|
|---|
| Research Institution | Nagoya University |
|---|
Principal Investigator |
KOIKE Makoto Nagoya Univ., Solar-Terr.Env.Lab., Research Associate, 太陽地球環境研究所, 助手 (00225343)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
TAMARU Takashi Institute of Aircraft Engineering, Head Scientist, 航空技術研究所, 研究室長
MURATA Isao Tohoku Univ., Dep.of Science, Research Associate, 理学研究科, 助手
NISHINO Masanori Nagoya Univ., Solar-Terr.Env.Lab., Research Associate, 太陽地球環境研究所, 講師 (70023679)
KONDO Yutaka Nagoya Univ., Solar-Terr.Env.Lab., Professor, 太陽地球環境研究所, 教授 (20110752)
NAKAJIMA Hideaki Nagoya Univ., Solar-Terr.Env.Lab., Research Associate, 太陽地球環境研究所, 助手 (20217722)
塩川 和夫 名古屋大学, 太陽地球環境研究所, 助手 (80226092)
|
|---|
| Project Period (FY) |
1995 – 1996
|
| Project Status |
Completed (Fiscal Year 1996)
|
| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1996: ¥2,100,000 (Direct Cost: ¥2,100,000)
|
|---|
| Keywords | Reactive nitrogen / Nitrogen dioxide / Nitric oxide / Photolysis converter / Aircraft measurement / Tropospheric ozone / 総反応性窒素酸化物 |
|---|
| Research Abstract |
NO_x (NO+NO_2) plays a critical role on the phtochemical ozone (03) production in the troposhere. In this study, a prototype system for NO_2 detection has been developed for a future application on the aircraft measurement.
The UV Photolysis system to convert NO_2 into NO is the key of the instrument, beause the NO detection system has been already developed. We have used a metal halogen lamp as a light source. We have also used a photolysis cell of which wall was coated with reflective aluminum to increase the photolysis rate in the cell. We have also developed a Teflon valve to control a pressure inside the photolysis cell. As a result, a conversion efficiency of about 50% was obtained with a residence time inside of the cell of 1-2 sec. A conversion efficiency can be higher when pressure inside the cell is kept higher, however other molecules such as N_2O_5 was found to also be photodissociated. In addition, Uv in the wavelength shorter than 320nm should be cut using optical filter to prevent the photodissociation of HNO_3. Based on these results, we plan to develop a NO_2 detection system which can be used on board the aircraft.
|
