The KWISP opto-mechanical force sensor has been built and calibrated in the INFN Trieste optics laboratory and is now under off-beam commissioning at CAST. It is designed to detect the pressure exerted by a flux of solar Chameleons on a thin (100 nm) Si$_3$N$_4$ micromembrane thanks to their direct coupling to matter. A thermally-limited force sensitivity of $1.5 \cdot 10^-14~\mboxN/\sqrt\mboxHz$, corresponding to $7.5 \cdot 10^-16~\mboxm/\sqrt\mboxHz$ in terms of displacement, has been obtained. An originally developed prototype chameleon chopper has been used in combination with the KWISP force sensor to conduct preliminary searches for solar chamaleons.
Recent Progress with the KWISP Force Sensor
CANTATORE, GIOVANNI;
2015-01-01
Abstract
The KWISP opto-mechanical force sensor has been built and calibrated in the INFN Trieste optics laboratory and is now under off-beam commissioning at CAST. It is designed to detect the pressure exerted by a flux of solar Chameleons on a thin (100 nm) Si$_3$N$_4$ micromembrane thanks to their direct coupling to matter. A thermally-limited force sensitivity of $1.5 \cdot 10^-14~\mboxN/\sqrt\mboxHz$, corresponding to $7.5 \cdot 10^-16~\mboxm/\sqrt\mboxHz$ in terms of displacement, has been obtained. An originally developed prototype chameleon chopper has been used in combination with the KWISP force sensor to conduct preliminary searches for solar chamaleons.| File | Dimensione | Formato | |
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Recent Progress with the KWISP Force Sensor.pdf
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