Paper 13100-154
Paper 13100-154
Assessment of adhesive wear and friction properties between Al6061-T6 and SSX65Cr13 in cryogenics conditions in the context of the Central Wheel Mechanism for MICADO
On demand | Presented live 19 June 2024 
Abstract
The degradation of large rotating cryogenic structures such as the Central Wheel Mechanism for MICADO, particularly in terms of wear and friction, has not been fully understood. This work aims to address this gap by developing computational and experimental tools to tackle these issues. By developing a numerical model and subsequently validating it with an experimental cryogenic setup, we aim to quantify the wear and the evolution of friction in some of the MICADO cryogenic rotating components.
Presenter
NOVA optical infrared instrumentation group at ASTRON (Netherlands)
Ioannis Politopoulos is an Instrument Engineer and Systems Engineer at NOVA, the national research institute for astronomy in the Netherlands. He is currently working as facility coordinator and local AIT manager for system integration and testing for METIS/ELT.
His past (and occasionally current) work revolves around the AIT phase of various instruments, such as HARPS3/INT, 4MOST/VISTA telescope, but also around optics manufacturing, active mirrors control, and general technology development for astronomical instrumentation.
He has worked in polishing of thin shells for adaptive mirrors for the UH88 telescope, controlling and creating metrology procedures and setups for active mirrors such as FAME, the Freeform Active Mirror Experiment.
As side projects he likes taking new technological challenges such as characterization of material properties, and producing data analysis software, for example for thermal background subtraction, or neural network routines for X-ray images.
Also in the session