Abstract
High Power Ultrasound (HPU) can be generated by the application of Pulsed Power Technology to produce acoustic waves of high power and bandwidth. A study was conducted into the variation of the amplitude and frequency content of the acoustic signal with the applied voltage, pulse energy and electrode separation.
Measurements indicate that, for a given electrode separation, whilst there is some increase in the amplitude of the detected acoustic emission with an increase in the electrical pulse energy it is only a modest effect. For a given pulse energy a considerably greater increase in the acoustic signal is observed when the distance between the electrodes is extended - thereby increasing the size of the signal source. The maximum amplitude of the detected signal approximately varies as the electrode separation to the power of (2)/(3). At large separations the delay time between the application of the voltage pulse and the breakdown of the water is considerable thus allowing energy loss through ionic conduction in the water.
Measurements indicate that, for a given electrode separation, whilst there is some increase in the amplitude of the detected acoustic emission with an increase in the electrical pulse energy it is only a modest effect. For a given pulse energy a considerably greater increase in the acoustic signal is observed when the distance between the electrodes is extended - thereby increasing the size of the signal source. The maximum amplitude of the detected signal approximately varies as the electrode separation to the power of (2)/(3). At large separations the delay time between the application of the voltage pulse and the breakdown of the water is considerable thus allowing energy loss through ionic conduction in the water.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 26th international power modulator symposium and 2004 high voltage workshop |
| Subtitle of host publication | conference record |
| Place of Publication | New York |
| Publisher | IEEE |
| Pages | 458-461 |
| Number of pages | 4 |
| ISBN (Print) | 0780385861 |
| DOIs | |
| Publication status | Published - 2004 |
| Event | 26th International Power Modulator Symposium/High Voltage Workshop - San Francisco, United States Duration: 23 May 2004 → 26 May 2004 |
Conference
| Conference | 26th International Power Modulator Symposium/High Voltage Workshop |
|---|---|
| Country | United States |
| City | San Francisco |
| Period | 23/05/04 → 26/05/04 |
Keywords
- high power
- ultrasound
- acoustic
- source applications
- acoustic applications
- ultrasonic imaging
- pulse measurements
- pulse generation
- power generation
- electrodes
- breakdown voltage
- acoustic emission
- acoustic pulses , Acoustic signal detection