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Laser-interferometric dilatometry from 100 K to 325 K

Hamann, Ines and Spannagel, Ruven and Sanjuan, Jose and Guzman, Felipe and Braxmaier, Claus (2017) Laser-interferometric dilatometry from 100 K to 325 K. DPG-Tagung, 06.03-10.03.2017, Mainz, Deutschland.

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To enable high precision optical measurements highly dimensionally stable materials are needed. Dimensional stability is an important material property describing the dependency of geometrical dimensions of an optical setup due to temperature fluctuations. Optical setups are often built with components made of glass-ceramics or composite materials which exhibit low coefficients of thermal expansion (CTE). These materials have to be characterized over the full operating temperature range to accurately predict the response of the optical system and the impact on its measurement performance. Our laser dilatometer setup is designed to characterize these low expansion materials in a temperature range from 100 K to 325 K, using a heterodyne laser interferometer to measure the dimensional changes of a sample due to well-controlled temperature variations. In this talk, we present the current status of our test facility, and recent improvements to decrease the uncertainty budget to levels of 10 ppb/K over the temperature range from 100 K to 325 K.

Item URL in elib:https://elib.dlr.de/112001/
Document Type:Conference or Workshop Item (Poster)
Title:Laser-interferometric dilatometry from 100 K to 325 K
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hamann, Inesdlr-ryUNSPECIFIED
Spannagel, Ruvendlr-ry, bremenUNSPECIFIED
Sanjuan, Josedlr-ryUNSPECIFIED
Guzman, FelipeDLR BremenUNSPECIFIED
Braxmaier, Clausclaus.braxmaier (at) dlr.deUNSPECIFIED
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Laser Dilatometer interferometer
Event Title:DPG-Tagung
Event Location:Mainz, Deutschland
Event Type:national Conference
Event Dates:06.03-10.03.2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Systems Enabling Technologies
Deposited By: Hüls, Simone
Deposited On:27 Apr 2017 10:34
Last Modified:27 Apr 2017 10:34

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