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Leakage Rate Detection of ConFlat Seals in Aluminum and Stainless Steel Flanges under Mechanical Loads for Quantum Optical Experiments in Space

Elsen, Michael and Dao, Thi Thu Hien and Braxmaier, Claus and Grosse, Jens (2021) Leakage Rate Detection of ConFlat Seals in Aluminum and Stainless Steel Flanges under Mechanical Loads for Quantum Optical Experiments in Space. Journal of Vacuum Science and Technology B, 39 (6). American Institute of Physics (AIP). doi: 10.1116/6.0001525. ISSN 2166-2746.

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Official URL: https://avs.scitation.org/doi/10.1116/6.0001525

Abstract

Several space missions, such as quantum optical experiments or quantum sensors, require ultra-high vacuum (UHV) systems to perform their experiments and fulfil the scientific mission goals. Most of these experiments use standard ConFlat (CF) flanges for the design of the UHV system. One of the biggest challenges for these vacuum systems during a space mission, are the mechanical loads. These loads are applied during launch, stage separation etc. as a combination of static and dynamic loads. When loads are applied, the UHV system can experience an increased leakage rate which decreases the vacuum quality. Investigations of the rise of the leakage rate due to static loads is an important step to allow a proper design process of space suitable UHV systems. In this paper, CF DN40 flange connections will be experimentally tested for standard aluminum (AluVaC(R)) and stainless steel (316LN-ESR, 14429-ESU) tubes. Additionally, three different bolt pretension torques of 10 Nm, 12.5 Nm and 15 Nm are tested and compared. The presented results can be used to improve the design and assembly procedure for future UHV systems, such as the MAIUS (Matter-Wave Interferometry under Microgravity) sounding rocket missions.

Item URL in elib:https://elib.dlr.de/146475/
Document Type:Article
Title:Leakage Rate Detection of ConFlat Seals in Aluminum and Stainless Steel Flanges under Mechanical Loads for Quantum Optical Experiments in Space
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Elsen, MichaelUniversity of Bremen, Center of Applied Space Technology and Microgravity (ZARM), 28359 BremenUNSPECIFIED
Dao, Thi Thu HienUniversity of Bremen, Center of Applied Space Technology and Microgravity (ZARM), 28359 BremenUNSPECIFIED
Braxmaier, Clausclaus.braxmaier (at) dlr.deUNSPECIFIED
Grosse, JensUniversity of Bremen, Center of Applied Space Technology and Microgravity (ZARM), 28359 BremenUNSPECIFIED
Date:29 November 2021
Journal or Publication Title:Journal of Vacuum Science and Technology B
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:39
DOI :10.1116/6.0001525
Publisher:American Institute of Physics (AIP)
Series Name:Vacuum Measurement and Technology
ISSN:2166-2746
Status:Published
Keywords:Mechanical instruments Microgravity Quantum optics Testing procedures Vacuum technology Ultra-high vacuum Vacuum systems Sensors
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication, Navigation, Quantum Technology
DLR - Research area:Raumfahrt
DLR - Program:R KNQ - Communication, Navigation, Quantum Technology
DLR - Research theme (Project):R - Quantum metrology
Location: Ulm
Institutes and Institutions:Institute of Quantum Technologies > Quantum Metrology
Deposited By: Hamann, Ines
Deposited On:01 Dec 2021 18:43
Last Modified:01 Dec 2021 18:43

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