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Title: Toward a better system for short range precision force measurements

Abstract

Many precision experiments have been done in the Casimir regime and in short range gravity when the separation between the interacting bodies is in the sub-micron range. Experimental complexity is minimized when one of the bodies is a sphere and the other one is a plate, making the alignment between the two bodies ubiquitous. In this work, our group has produced the most precise Casimir measurements, and the best limits on predicted Yukawa-like potentials by measuring a force between a R~150μm sphere attached to a (500μm)2 micro-mechanical oscillator and a planar source mass. By replacing the spherical surface with a fraction of a 500μm long cylinder with R~150μm, the force sensitivity can be greatly enhanced. Here, it is paramount to know the angular deviation between the long axis of the cylinder and both the axis of rotation of the oscillator and the plate. Tests between a cylinder and a structure etched into a silicon wafer show that deviations of 20μrad are readily accessible. Additionally, a scaled up experiment is used to investigate if capacitance measurements can determine the orientation of the cylinder with respect to a plane with the required precision.

Authors:
 [1];  [2];  [3];  [3];  [1]
  1. Purdue Univ. Indianapolis, IN (United States)
  2. Univ. Federal do Río de Janeiro (Brazil). Inst. de Física
  3. Argonne National Lab. (ANL), Lemont, IL (United States). Center for Nanoscale Materials (CNM)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1607631
Grant/Contract Number:  
AC02-06CH11357; PHY-1607360; PHY-1707985
Resource Type:
Accepted Manuscript
Journal Name:
Modern Physics Letters A
Additional Journal Information:
Journal Volume: 35; Journal Issue: 03; Journal ID: ISSN 0217-7323
Publisher:
World Scientific Publishing
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Casimir; Short range gravity; Yukawa potential; cylinder; Casimir force

Citation Formats

Bsaibes, Thomas, Pires, Luís, Czaplewski, David, López, Daniel, and Decca, Ricardo S. Toward a better system for short range precision force measurements. United States: N. p., 2020. Web. https://doi.org/10.1142/S0217732320400027.
Bsaibes, Thomas, Pires, Luís, Czaplewski, David, López, Daniel, & Decca, Ricardo S. Toward a better system for short range precision force measurements. United States. https://doi.org/10.1142/S0217732320400027
Bsaibes, Thomas, Pires, Luís, Czaplewski, David, López, Daniel, and Decca, Ricardo S. Thu . "Toward a better system for short range precision force measurements". United States. https://doi.org/10.1142/S0217732320400027. https://www.osti.gov/servlets/purl/1607631.
@article{osti_1607631,
title = {Toward a better system for short range precision force measurements},
author = {Bsaibes, Thomas and Pires, Luís and Czaplewski, David and López, Daniel and Decca, Ricardo S.},
abstractNote = {Many precision experiments have been done in the Casimir regime and in short range gravity when the separation between the interacting bodies is in the sub-micron range. Experimental complexity is minimized when one of the bodies is a sphere and the other one is a plate, making the alignment between the two bodies ubiquitous. In this work, our group has produced the most precise Casimir measurements, and the best limits on predicted Yukawa-like potentials by measuring a force between a R~150μm sphere attached to a (500μm)2 micro-mechanical oscillator and a planar source mass. By replacing the spherical surface with a fraction of a 500μm long cylinder with R~150μm, the force sensitivity can be greatly enhanced. Here, it is paramount to know the angular deviation between the long axis of the cylinder and both the axis of rotation of the oscillator and the plate. Tests between a cylinder and a structure etched into a silicon wafer show that deviations of 20μrad are readily accessible. Additionally, a scaled up experiment is used to investigate if capacitance measurements can determine the orientation of the cylinder with respect to a plane with the required precision.},
doi = {10.1142/S0217732320400027},
journal = {Modern Physics Letters A},
number = 03,
volume = 35,
place = {United States},
year = {2020},
month = {1}
}

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