P-WAVE SBS42 – the Borehole Source
The borehole source SBS42 generates compressional waves (P) in water filled boreholes. The seismic signals are highly repeatable. Energy released by the IPG5000 discharges through a coaxial cable terminated by two adjacent spark electrodes. The spark discharge vaporizes water by a high-pressure plasma. This generates vapour bubbles which expand and collapse, thereby generating high-frequency seismic waves.
Technical Details
| Generated wave types: | P |
| Signal frequencies: | Up to 5 kHz (depending on geology and borehole distance) |
| Operational depth: | Up to 400 m |
| Source length: | 645 mm |
| Source diameter: | 45 mm |
| Source weight: | 3.8 kg |
| Cable weight per metre: | 206 g |
| Cable strength: | 3400 N |
| Borehole diameter: | Min. 50 mm |
| Clamping system: | Not required |
| Depth indicator: | Cable marking every 2 m |
| Connector: | To Impulse Generator IPG5000 |
| Storage: | On drum |
Manufactured by Geotomographie GmbH
Technical Details
Generated wave types: SV
Signal frequencies: Up to 500 Hz (depending on geology and borehole distance)
Operational depth: Up to 100 m
Source length: 1015 mm
Source weight: 6 kg
Cable weight per metre: 377 g
Borehole diameter: 75-100 mm (or larger if spacers are used)
Clamping system: Infatable bladder
Depth indicator: Cable marking every 2 m
Connector: To impulse generator IPG800 or IPG5000
Storage: On drum
Switch box: Switch between two vertical shot directions
