Amplification of ultrasonic wave by plasma
Amplification of an ultrasonic wave by plasma particles is experimentally shown to occur in a weakly ionized (air) plasma under a suitable condition. Since neutral–neutral collisions are dominant, but ion–neutral collisions are not negligible in such a plasma, momentum transfer between plasma ions a...
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| Published in | Physics of plasmas Vol. 8; no. 3; pp. 1081 - 1083 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.03.2001
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| Online Access | Get full text |
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| Summary: | Amplification of an ultrasonic wave by plasma particles is experimentally shown to occur in a weakly ionized (air) plasma under a suitable condition. Since neutral–neutral collisions are dominant, but ion–neutral collisions are not negligible in such a plasma, momentum transfer between plasma ions and neutrals, taking part in the ultrasonic wave, possibly occurs. As a result, interaction with plasma ions causes the amplification of the ultrasonic wave. Observations also indicate that the ultrasonic wave amplitude increases with increasing plasma density. |
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| ISSN: | 1070-664X 1089-7674 |
| DOI: | 10.1063/1.1339833 |