2002 Fiscal Year Final Research Report Summary
Trial construction of a non-contacting measurement system of elastic constants for tiny crystals
| Project/Area Number |
13555167
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Physical properties of metals
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| Research Institution | KAGAWA UNIVERSITY (2002)
Kyoto University (2001) |
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Principal Investigator |
TANAKA Katsushi Kagawa Univ., Advanced Mater.Sci., Associate Professor, 工学部, 助教授 (30236575)
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| Co-Investigator(Kenkyū-buntansha) |
KODAMA Isao Nippon Techno Plus, Develop Section, Honbucho, 研究開発部, 本部長(研究職)
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| Project Period (FY) |
2001 – 2002
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| Keywords | Brillouin scattering / DPSS laser / Photo multiplier / Elasticity / Etalon |
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| Research Abstract |
A new apparatus for measuring elastic, constants of tiny crystals has been developed. The appa rates is based on the Brillouin scattering that is frequently applied to the measurement of non-metallic materials, for example ceramics or organic materials. The most of apparatus for measuring the Brillouin scattering in uses Ar-ion laser that has very large volume and electrical power required is quite large to obtain enough output power. We adopt a new light source that is diode pumped solid state (DPSS) laser, which has very small volume and high efficiency of conversion from electrical to light. The most important point of the light source for the Brillouin scattering is the line width (purity) of the light. We have checked the purity and confirmed that the line width is enough narrow for the Brillouin scattering
Another key part of the apparatus is light detector ; the detector must has high sensitivity, stability and low noise feature. A photo multiplier is frequently used to the detector, however, conventional one has low quantum efficiency. We adopt a new type of photo multiplier that has a different material to emitter with high quantum efficiency of about 40% for the light of 532nm
By using such newly developed parts, we have succeeded to construct a new apparatus having small volume and high efficiency
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