Kongressbeiträge, Tagungsbeiträge - Abstracts

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Erstellt: Thu, 07 Dec 2023 23:10:55 +0100 in 0.0581 sec


Keck, Lorenz; Seifert, Frank; Schlamminger, Stephan; Newell, David; Theska, René; Haddad, Darine
A Kibble balance as part of a quantum measurement institute in one room at NIST. - In: SMSI 2023 Conference - Sensor and Measurement Science International, (2023), S. 125-126

The new Kibble balance at the National Institute of Standards and Technology (NIST) is part of the Quantum Electro-Mechanical Metrology Suite (QEMMS). Two quantum standards are incorporated directly in the electrical circuit of the Kibble balance for the realization of the unit of mass. This eliminates the need for external calibration in the Kibble balance experiment. The targeted uncertainty is 2 μg on a 100 g mass and a range from 10 g to 200 g will be covered. We introduce the measurement concept of the QEMMS, show the current state of development and publish first measurements proving the performance of the newly designed balance mechanics.



https://doi.org/10.5162/SMSI2023/B6.1
Schulze, Sven; Arumugam, Kumar; Schlamminger, Stephan; Theska, René; Shaw, Gordon
Capacitance analysis of a shielded sphere-flat capacitor in a high precision electrostatic force balance. - In: Proceedings of the 23rd International Conference of the European Society for Precision Engineering and Nanotechnology, (2023), S. 449-452

Torres Melgarejo, Mario André; Wittke, Martin; Theska, René
Investigation of the sensitivity of a high-precision weighing cell to disturbances caused by the adjustment system. - In: Proceedings of the 23rd International Conference of the European Society for Precision Engineering and Nanotechnology, (2023), S. 223-224

Weigert, Florian; Wolf, Matthias; Theska, René
Highly reproducible force application for a tool-changing system in nanofabrication machines. - In: Proceedings of the 23rd International Conference of the European Society for Precision Engineering and Nanotechnology, (2023), S. 73-74

Wittke, Martin; Torres Melgarejo, Mario André; Darnieder, Maximilian; Theska, René
Modeling of very thin flexure hinges considering surface topography. - In: Proceedings of the 23rd International Conference of the European Society for Precision Engineering and Nanotechnology, (2023), S. 71-72

Hebenstreit, Roman; Oertel, Erik; Thier, Daniel; Manske, Eberhard; Theska, René
Investigating the kinematic performance of a positioning device with subatomic resolution. - In: Proceedings of the 23rd International Conference of the European Society for Precision Engineering and Nanotechnology, (2023), S. 51-54

Wittke, Martin; Darnieder, Maximilian; Torres Melgarejo, Mario André; Theska, René
Novel method for determining the mechanical stiffness of weighing cells. - In: SMSI 2023 Conference - Sensor and Measurement Science International, (2023), S. 139-140

Weighing cells with electromagnetic force compensation are frequently used in precision balances and mass comparators. The kinematic structure is given by a compliant mechanism with concentrated compliances. Thin flexure hinges enable highly reproducible motion but limit the sensitivity to mass changes due to their rotational stiffness. To achieve the desired sensitivity, the stiffness of the mechanism must be further reduced by mechanical adjustments. To optimize the adjustment parameters, the initial stiffness of the mechanism needs to be characterized accurately. For this purpose, a novel self-testing method was developed. It allows accurate determination of the elastic stiffness of the weighing cell and the geometric stiffness caused by the masses of the linkages. The method uses static stiffness measurements in three orientations. The gravity vector must be orthogonal to the plane of motion to characterize the elastic stiffness. Determining the geometric stiffness requires the system to be in the working orientation. The upside-down orientation is used to confirm the results. This paper considers the novel method analytically and simulates using a rigid body model and the finite element method. The measurement of the stiffness of a weighing cell prototype is taken to validate the method.



https://doi.org/10.5162/SMSI2023/B7.4
Keck, Lorenz; Seifert, Frank; Newell, David; Theska, René; Haddad, Darine
Characterization and alignment of the flexure mechanism for the new Kibble balance at NIST. - In: ASPE Annual Meeting 2022, (2023), S. 80-84

Keck, Lorenz; Schlamminger, Stephan; Seifert, Frank; Newell, David; Theska, René; Hahhdad, Darine
Design of the mechanical system for the quantum electro-mechanical metrology suite. - In: 36th ASPE Annual Meeting 2021, (2022), S. 53-56

Schulze, Sven; Keck, Lorenz; Rogers, Kyle; Simonds, Brian; Artusio-Glimpse, Alexandra; Williams, Paul; Lehman, John; Seifert, Frank; Newell, David; Theska, René; Schlamminger, Stephan; Shaw, Gordon
An electrostatic force balance as a primary standard to measure high laser power by a multiple reflection system. - In: 36th ASPE Annual Meeting 2021, (2022), S. 11-15