Effects of particle contamination during laser-based sample processing
Project Description
Laser methods of chemical analysis are ideal for space flight as they offer in situ, spatially-resolved measurements of unprocessed samples. However, such methods are also associated with the generation/ deposition of particulates on local surfaces. Here we will map the shape of the plume, evaluate the susceptibility of different materials to collect particulates and design a novel laser delivery system to mitigate deposition/contamination.
We will characterize quantitatively particle deposition during in situ laser ablation/desorption of powdered sample specimens whilst implementing the following parameters: I. Mars ambient pressure environment II. Mars analog sample chemistry (i.e., nontronite); III. Multiple distances between the irradiated sample surface and stainless steel ion guide and witness plates of different materials; and, IV. Variable incident laser intensity.
More »Anticipated Benefits
The results derived here have already fed into to the MOMA flight project, specifically influencing cleanliness requirements, lifetime contamination specifications and contamination models.
This study can be applied to any laser-based instrument that is operated under environmental conditions similar to those explored here, specifically Mars ambient atmosphere.
Any commercial space application interested in the directionality of laser-induced contamination may be considered a beneficiary of this work.
Any government agency interested in the directionality of laser-induced contamination may be considered a beneficiary of this work.
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Primary U.S. Work Locations and Key Partners
| Organizations Performing Work | Role | Type | Location |
|---|---|---|---|
Goddard Space Flight Center
(GSFC)
|
Lead Organization | NASA Center | Greenbelt, Maryland |
Primary U.S. Work Locations
-
Maryland
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This is a historic project that was completed before the creation of TechPort on October 1, 2012. Available data has been included. This record may contain less data than currently active projects.