| Project/Area Number |
07458112
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Nuclear fusion studies
|
|---|
| Research Institution | TOKYO INSTITUTE OF TECHNOLOGY |
|---|
Principal Investigator |
OGAWA Masao Research Laboratory for Nuclear Reactors, TOKYO INSTITUTE OF TECHNOLOGY,Professor, 原子炉工学研究所, 教授 (60016863)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
NAKAJIMA Mitsuo Interdisciplinary Graduate School of Science and Engineering, TOKYO INSTITUTE OF, 大学院・総合理工学研究科, 教務職員 (30198098)
AOKI Takayuki Interdisciplinary Graduate School of Science and Engineering, TOKYO INSTITUTE OF, 大学院総合理工学研究科, 助手 (00184036)
HORIOKA Kazuhiko Interdisciplinary Graduate School of Science and Engineering, TOKYO INSTITUTE OF, 大学院・総合理工学研究科, 助教授 (10126328)
|
|---|
| Project Period (FY) |
1995 – 1996
|
| Project Status |
Completed (Fiscal Year 1996)
|
| Budget Amount *help |
¥5,700,000 (Direct Cost: ¥5,700,000)
Fiscal Year 1996: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1995: ¥4,600,000 (Direct Cost: ¥4,600,000)
|
|---|
| Keywords | Plasma / Heavy Ions / Fusion / Laser |
|---|
| Research Abstract |
A high density plasma was formed by irradiation of CO2 laser. The laser had an output energy of 3J with a time duration of 1mus. Polyethylene was adopted as a target material. Ablating plasma of hydrogen was observed up to more than 10 mm from target surface. The Stark broadening of Halpha and Hbeta lines was measured as a function of time and space to obtain electron density of the plasma. The electron density of the expanding plasma decreased as a power function of distance from 10^<19>cm^<-3> to 10^16cm^<-3>. The optical analysis revealed that the plasma was feasible as an in-beam target from the view point of size and density.
A Li^+ beam of 0.9 MeV was injected to the polyethylene plasma. The Li ions stripped to the charge state of 3^+ were analyzed with a magnet and then detected with a scintillator. A carbon foil was used as a cold matter for comparison. Although the plasma enhancement was not yet fully observed, the ablating matter revealed the same effect as a charge stripper with the carbon foil. A new vacuum chamber was fabricated to observe simultaneously the ions of 1^+,2^+,3^+ states. The measurement of interaction of heavy ions with the high-density plasma is to be initiated in one month.
In addition to the in-beam experiment, a Mach-Zehnder interferometer of two waves was assembled by combining He-Ne and Ar lasers. The interferometer was first tested with a z-pinch helium plasma. It was hard to observe the interferometry at the time when the high density was formed because of the non-uniformity of the plasma medium.
|
