Authors: Brennetot, R.; Lacour, J.L.; Vors, E.; Rivoallan, A.; Vailhen, D.; Maurice, S.

Source: Applied Spectroscopy, Volume 57, Issue 7, Pages 208A-220A and 729-892 (July 2003) , pp. 744-752(9)

Publisher: Society for Applied Spectroscopy

Abstract:

A project called MALIS (Mars Analysis by Laser-Induced breakdown Spectroscopy) is under progress to perform in situ analysis of Mars soils and rocks. This paper reports on the behavior of plasma in Martian conditions, i.e., in a CO₂ atmosphere at pressures between 5 and 12 mbar. Plasma expansion and lifetime have been studied in order to compare plasma evolution under standard conditions (air at atmospheric pressure) and in a Mars atmosphere. We have shown that the Mars environment favors plasma expansion and lifetime. The second part of the study concerns optimization of the emission signal from the plasma. An original approach has been chosen, as we used a Doehlert design for the first time in laser-induced breakdown spectroscopy (LIBS). The best conditions obtained are for a laser wavelength of 1064 nm with the maximum energy available due to space limitations, which is 40 mJ at 15 Hz. The other factors studied are delay, angle of incidence, and CO₂ pressure. We have shown that these factors do not have the same influence depending on which spectroscopic line is used, i.e., the atomic line or the ionic line.

Keywords: LASER-INDUCED BREAKDOWN SPECTROSCOPY; LIBS; MARS IN SITU ANAYLSIS; MALIS; OPTIMIZATION; DOEHLERT DESIGN; EMISSION SPECTROSCOPY

Document Type: Research article

DOI: http://dx.doi.org/10.1366/000370203322102816

Publication date: 2003-07-01

More about this publication?

• The Society publishes the internationally recognized, peer reviewed journal, Applied Spectroscopy, which is available both in print and online. Subscriptions are included with membership or can be purchased by institutional or corporate organizations. Abstracts may be viewed free of charge.
  
  Previously published as Bulletin (Society for Applied Spectroscopy)
• Editorial Board
• Information for Authors
• Submit a Paper
• Subscribe to this Title
• Membership Information
• Request copyrighted SAS materials
• Spectroscopic Nomenclature
• Focus Compendium
• ingentaconnect is not responsible for the content or availability of external websites

Related content

• In this: publication
• By this: publisher
• In this Subject: Analytical Chemistry
• By this author: Brennetot, R. ;  Lacour, J.L. ;  Vors, E. ;  Rivoallan, A. ;  Vailhen, D. ;  Maurice, S.

Website © Publishing Technology. Article copyright remains with the publisher, society or author(s) as specified within the article.

• Terms and conditions
• Privacy policy
• Information for advertisers