Opto-mechanical test results for the Near Infra-red Camera on the James Webb Space Telescope

2008 ◽  
Author(s):  
E. Todd Kvamme ◽  
Michael Jacoby ◽  
Liz Osborne
Keyword(s):  
Mechanical Test ◽  
Test Results ◽  
Space Telescope ◽  
James Webb Space Telescope ◽  
Infra Red

scholarly journals Performance Study of Grass-Derived Nano-Cellulose and Polycaprolactone Composites for 3D Printing

2021 ◽  
Vol 11 (3) ◽  
pp. 1273
Author(s):  
Chen Feng ◽  
Jiping Zhou ◽  
Xiaodong Xu ◽  
Yani Jiang ◽  
Hongcan Shi ◽  
...  
Keyword(s):  
3D Printing ◽  
Mechanical Test ◽  
Chemical Properties ◽  
Test Results ◽  
Performance Study ◽  
Compression Process ◽  
Ansys Fluent ◽  
Nano Cellulose ◽  
Physical And Chemical ◽  
And Chemical Properties

In recent years, 3D printing has received increasing attention from researchers. This technology overcomes the limitations of traditional technologies by printing precise and personalized scaffold with arbitrary shapes, pore structures, and porosities for the applications in various tissues. The cellulose nanocrystal (CNC) is extracted from Humulus Japonicus (HJS) and mixed with poly(ε-caprolactone) (PCL) to prepare a series of CNC/PCL composites for printing. Based on the analysis of the physical and chemical properties of the series of the CNC/PCL composites, an optimal mass ratio of CNC to PCL was obtained. The Solidworks was used to simulate the stretching and compression process of the scaffolds with three different patterns under an external force. The flow of nutrient solution in the scaffolds with different patterns was simulated by ANSYS FLUENT, and then a new optimization scaffold pattern with a concave hexagon shape was advised based on the simulation results. Collectively, the mechanical test results of the material and scaffold confirmed that the optimal filling amount of the CNC was 5%, and the scaffold pattern with concave hexagon shape exhibited better mechanical properties and suitable for the transport of cells and nutrients, which is expected to be more widely used in 3D printing.

scholarly journals A Spitzer Warm Mission Ultra-Wide Survey As A Target Finder For The James Webb Space Telescope

2007 ◽  
Author(s):  
Jonathan P. Gardner ◽  
Xiaohui Fan ◽  
Gillian Wilson ◽  
Massimo Stiavelli ◽  
Lisa J. Storrie-Lombardi ◽  
...  
Keyword(s):  
Space Telescope ◽  
James Webb Space Telescope

Transient liquid phase bonding of Cu and Al using metallic particles interlayers

2021 ◽  
pp. 095440542098823
Author(s):  
Alireza Zaheri ◽  
Mohammadreza Farahani ◽  
Alireza Sadeghi ◽  
Naser Souri
Keyword(s):  
Liquid Phase ◽  
Mechanical Test ◽  
Transient Liquid Phase ◽  
Transient Liquid Phase Bonding ◽  
Joint Interface ◽  
Test Results ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metallic Particles ◽  
Powder Interlayer

The bonding strength, and microstructures of Cu and Al couples using metallic powders as interlayer during transient liquid phase bonding (TLP bonding) were investigated. The interfacial morphologies and microstructures were studied by scanning electron microscopy equipped with energy dispersive X-ray spectroscopy, and X-ray diffraction. First, to explore the optimum bonding time and temperature, nine samples were bonded without interlayers in a vacuum condition. Mechanical test results indicated that bonding at 560°C in 20 min returns the highest bond strength (84% of Al). This bonding condition was used to join ten samples with powder interlayers. Powders were prepared by mixing different combinations of Cu, Al (+Fe nanoparticles) and Zn. In the bonding zone, different Cu9Al4, CuAl, and CuAl2 intermetallic co-precipitate. The strongest bonding is formed in the sample with the 70Al (+Fe)-30Cu powder interlayer. Powder interlayers present thinner and more uniform intermetallic layers at the joint interface.

scholarly journals The mid-infrared instrument for the James Webb Space Telescope: performance and operation of the Low-Resolution Spectrometer

2016 ◽  
Author(s):  
Sarah Kendrew ◽  
Silvia Scheithauer ◽  
Patrice Bouchet ◽  
Jerome Amiaux ◽  
Ruymán Azzollini ◽  
...  
Keyword(s):  
Low Resolution ◽  
Mid Infrared ◽  
Space Telescope ◽  
James Webb Space Telescope ◽  
Resolution Spectrometer

Observatory alignment of the James Webb Space Telescope

2012 ◽  
Author(s):  
J. Scott Knight ◽  
D. Scott Acton ◽  
Paul Lightsey ◽  
Adam Contos ◽  
Allison Barto
Keyword(s):  
Space Telescope ◽  
James Webb Space Telescope
Sign in / Sign up

Export Citation Format

Share Document