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

#### 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.
##### Scheda breve Scheda completa
9783935702430
http://www-library.desy.de/preparch/desy/proc/proc15-02.pdf
http://arxiv.org/abs/1510.06312v1
File in questo prodotto:
File
Recent Progress with the KWISP Force Sensor.pdf

accesso aperto

Descrizione: pdf editoriale
Tipologia: Documento in Versione Editoriale
Licenza: Digital Rights Management non definito
Dimensione 2.41 MB
Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2871545