Piezo-resistive pressure cell with reduced radiation induced drifts under high-energy radiation
AssigneeAST Advanced Space Technologies GmbH
InventorsHans-Peter Harmann, Heiko Dartsch, Kyra Bekaan
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Abstract
The invention relates to relates to a pressure cell configured for working according to the piezo-resistive principle and for use under high-energy radiation, particularly for use in space, i.e. to work under cosmic radiation. In order to reduce radiation drift effects during operation of the pressure cell, the pressure cell is treated with a radiation hardening procedure comprising an exposing of the cell with a radiation dose up to a saturation range of a radiation drift curve or above.
Claims19
Method for generating a pressure cell configured for working according to the piezo-resistive principle and for use under high-energy radiation, particularly for use under cosmic radiation, wherein the pressure cell is of the type that exhibits a radiation-induced drift of at least one of a change in sensitivity of the pressure cell and a change in an offset measurement parameter of the pressure cell as a function of a radiation dose of high-energy radiation exhibited on the pressure cell,
- wherein
- the method comprises an exposing of the pressure cell with a radiation dose of high-energy radiation up to a start of a saturation range of the radiation-induced drift, wherein the radiation-induced drift asymptotically approaches within the saturation range a limit value with increasing radiation dose of high-energy radiation exhibited on the pressure cell.
Pressure cell, configured to work according to the piezo-resistive principle and for use under high-energy radiation, wherein the pressure cell comprises a stored calibration parameter taking into account a sensitivity of the pressure cell and/or an offset measurement parameter of the pressure cell, wherein the stored calibration parameter has been determined by exposing the pressure cell with the radiation dose up to the start of a saturation range.
Pressure cell, configured to work according to the piezo-resistive principle and for use under high-energy radiation, wherein the pressure cell is generated by exposing of the pressure cell with a radiation dose of high-energy radiation up to a start of a saturation range of a radiation-induced drift, wherein the radiation-induced drift asymptotically approaches within a saturation range a limit value with increasing radiation dose of high-energy radiation exhibited on the pressure cell.
Pressure sensor comprising a pressure cell, configured to work according to the piezo-resistive principle and for use under high-energy radiation, wherein the pressure cell is generated by exposing of the pressure cell with a radiation dose of high-energy radiation up to a start of a saturation range of a radiation-induced drift, wherein the radiation-induced drift asymptotically approaches within a saturation range a limit value with increasing radiation dose of high-energy radiation exhibited on the pressure cell.
Dependencies are inferred from the claim text.