Borehole logging tool including a particle accelerator
AssigneeSchlumberger Technology Corporation
InventorKenneth E. Stephenson
Life of this patent
Estimating the term…
Abstract
A borehole logging tool includes a particle accelerator including a Cockcroft-Walton voltage multiplier that provides linear axial and radial fields. The Cockcroft-Walton voltage multiplier includes capacitors that are arranged radially relative to one another, such that a linear voltage increase occurs between the capacitors. The particle accelerator is made by placing conductive foils on an insulating sheet, connecting the foils as a Cockcroft-Walton voltage multiplier, and rolling the insulating sheet with the foils into a cylinder to form the radially arranged capacitors.
Claims13
A logging tool comprising a tool body including:
- a source means for generating charged particles;
- a means for supplying a voltage signal;
- a Cockroft-Walton voltage multiplier that multiplies the voltage signal and includes a bank of radially arranged capacitors, the capacitors having layers which are substantially tubular and comprise an outer capacitor and at least one inner capacitor, such that the inner capacitor is nested within and surrounded by the outer capacitor;
- and
- an accelerator means biased by the multiplied voltage signal for accelerating particles from the source means such that voltage exterior to the accelerator means is no greater than the signal voltage.
A borehole logging tool comprising a tool body including:
- a source means for generating charged particles;
- a means for supplying a voltage signal;
- a Cockcroft-Walton voltage multiplier that multiplies the voltage signal and includes a bank of radially arranged capacitors, the capacitors having layers which are substantially tubular and comprise an outer capacitor and at least one inner capacitor, such that the inner capacitor is nested within and surrounded by the outer capacitor;
- and
- an accelerator means having two stages biased by the multiplied voltage signal for accelerating particles from the source means such that voltage exterior to the device is no greater than the signal voltage;
- and a cylindrical member that electrically connects each stage of the Cockcroft-Walton voltage multiplier to a corresponding stage of the accelerator means.
Dependencies are inferred from the claim text.