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JPL: Rover Fires Laser into Martian Rock

The technique used by the mission's chemistry and camera instrument, ChemCam, is called laser-induced breakdown spectroscopy. It has been used to determine composition of targets in other extreme environments.

The Mars rover Curiosity fired its laser for the first time on Mars, using the beam from a science instrument to blast a fist-size rock called "Coronation," according to a press release from.

The mission's Chemistry and Camera instrument, or ChemCam, hit the rock with 30 pulses of its laser during a 10-second period. Each pulse delivered more than a million watts of power for about five one-billionths of a second, the release stated.

The laser's energy excites atoms in the rock into an ionized, glowing plasma. ChemCam catches the light from that spark with a telescope and analyzes it with three spectrometers for information about what elements are in the target, the press release explained.

"Our team is both thrilled and working hard, looking at the results. After eight years building the instrument, it's payoff time!" ChemCam Principal Investigator Roger Wiens of Los Alamos National Laboratory, N.M, said in a prepared statement. 

The goal of this initial use of the laser on Mars was to serve as target practice for characterizing the instrument, but the activity may provide additional value. Researchers will check whether the composition changed as the pulses progressed. If it did change, that could indicate dust or other surface material being penetrated to reveal different composition beneath the surface. The spectrometers record intensity at 6,144 different wavelengths of ultraviolet, visible and infrared light.

"It's surprising that the data are even better than we ever had during tests on Earth, in signal-to-noise ratio," ChemCam Deputy Project Scientist Sylvestre Maurice of the Institut de Recherche en Astrophysique et Planetologie (IRAP) in Toulouse, France said in the release. "It's so rich, we can expect great science from investigating what might be thousands of targets with ChemCam in the next two years."

The technique used by ChemCam, called laser-induced breakdown spectroscopy, has been used to determine composition of targets in other extreme environments, such as inside nuclear reactors and on the sea floor, and has had experimental applications in environmental monitoring and cancer detection. Sunday's investigation of Coronation is the first use of the technique in interplanetary exploration.

two weeks ago, beginning a two-year mission using 10 instruments to assess whether a carefully chosen study area inside Gale Crater has ever offered environmental conditions favorable for microbial life.

ChemCam was developed, built and tested by the U.S. Department of Energy's Los Alamos National Laboratory in partnership with scientists and engineers funded by the French national space agency, Centre National d'Etudes Spatiales (CNES) and research agency, Centre National de la Recherche Scientifique (CNRS).

More information about Curiosity is online at http://www.nasa.gov/msl andhttp://mars.jpl.nasa.gov/msl/ . You can follow the mission on Facebook at:http://www.facebook.com/marscuriosity and on Twitter at:http://www.twitter.com/marscuriosity .

More information about ChemCam is available at www.msl-chemcam.com.

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