Desorption laser coupled to mass spectrometer for the analysis of regoliths

Details Desorption laser coupled to mass spectrometer for the analysis of regoliths Desorption laser coupled to mass spectrometer for the analysis of regoliths

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....9105y&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #9105

Physics

Optics

Scientific paper

The LIDNIS instrument (Laser Induced Desorption Neutral and Ion Spectrometer) is a desorption laser associated with a mass spectrometer proposed for the BepiColombo lander (Mercury Surface Element). The purpose of LIDNIS is to extract the volatiles trapped inside the upper layers of the regolith in order to analyze them by mass spectrometry. The surface is gradually heated by the laser, through progressive focusing, leading to the sequential desorption, first of exospheric species adsorbed at the surface, then of solar wind species implanted at greater depth in the regolith, finally of volatile species trapped in grains (like radiogenic compounds) and of atoms composing the minerals. The prototype of this laser, with its optics presently developed in the laboratory, will be described. The first tests of the capability of a laser diode emitting at 800 nm, with a power of 500 mW, to heat a surface of Mercury's type will be presented. A thermal model of this experiment has been also developed, in order to describe theoretically the temperature of a surface exposed to a laser flux. First applied to Mercury surface in its natural environment, exposed to solar radiation, this model describes properly the surface temperature and the first meters below during a whole diurnal cycle. Such a model is based on the resolution of the heat and radiative transfer equations in a 3-D domain from the surface down to 10 meters below. The results of our model, modified in such order to simulate the effect of a laser beam on a surface, will be provided. Comparaisons between simulations and experimental results will be presented and used to constrain this model in order to estimate the efficiency of LIDNIS in heating Mercury's regolith.

Affiliated with

Also associated with

No associations

Rating

Desorption laser coupled to mass spectrometer for the analysis of regoliths does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Desorption laser coupled to mass spectrometer for the analysis of regoliths, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Desorption laser coupled to mass spectrometer for the analysis of regoliths will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-844699