The robotic arm on Phoenix collected the sample, dubbed "Burning Coals," from a trench named "Burn Alive 3." In part of the trench, the arm had dug down to the hard, icy layer about 4 centimeters (1.6 inches) below the ground surface. Next to that deeper part, it left a bench of material about 1 centimeter (0.4 inch) above the icy layer, and then collected about one-fourth to one-half a teaspoon of loose soil from that benchtop into the scoop.
Early Thursday, downlinked information from Phoenix confirmed to the mission's science and engineering team that the arm had delivered some of that sample through the doors and almost completely filled cell number 7 of the lander's Thermal and Evolved-Gas Analyzer (TEGA).
TEGA won't begin heating an oven until it senses that oven is full. So the science team will command the oven door to close and the cell will begin heating the sample to low temperature, to 35 degrees Celsius, or 95 degrees Fahrenheit. TEGA scientists have successfully sent commands for an oven to close manually before, they noted.
The purpose of the low temperature heating is to look for ice in the sample. The next step is a middle temperature heating process, which heats the sample to 125 degrees Celsius, or 257 degrees Fahrenheit. This step assures that the sample is dry. The last heating occurs at 1,000 degrees Celsius, or 1,832 degrees Fahrenheit. The gases given off during these heating stages helps the science team to determine the specific properties of the Martian soil.
"We are expecting the sample to look similar to previous samples," said William Boynton of The University of Arizona, lead scientist for TEGA. "One of the things we'll be looking for now is an oxygen release indicative of perchlorate."
Perchlorate was found in a sample delivered to Phoenix?s Microscopy, Electrochemistry, and Conductivity Analyzer (MECA). The MECA team saw the perchlorate signal in a sample taken from the Dodo-Goldilocks trench on June 25, or Sol 30, or the 30th Martian day of the mission after landing, and again in another sample taken from the Snow White trench on July 6, or Sol 41. Seeing signs of perchlorate in TEGA would help confirm the previous results.
The new sample completes a three-level soil profile that also includes a surface material from a trench called Rosy Red and ice-layer material from a trench called Snow White.
"We want to know the structure and composition of the soil at the surface, at the ice and in-between to help answer questions about the movement of water -- either as vapor or liquid -- between the icy layer and the surface," said Ray Arvidson of Washington University in St. Louis, a leader of Phoenix science team activities.
The Phoenix mission is led by Peter Smith of The University of Arizona with project management at the Jet Propulsion Laboratory and development partnership at Lockheed Martin, located in Denver. International contributions come from the Canadian Space Agency; the University of Neuchatel; the universities of Copenhagen and Aarhus, Denmark; Max Planck Institute, Germany; and the Finnish Meteorological Institute.
Researchers discover link between magnetic field strength and temperature
21.08.2018 | American Institute of Physics
Smallest transistor worldwide switches current with a single atom in solid electrolyte
17.08.2018 | Karlsruher Institut für Technologie (KIT)
There are currently great hopes for solid-state batteries. They contain no liquid parts that could leak or catch fire. For this reason, they do not require cooling and are considered to be much safer, more reliable, and longer lasting than traditional lithium-ion batteries. Jülich scientists have now introduced a new concept that allows currents up to ten times greater during charging and discharging than previously described in the literature. The improvement was achieved by a “clever” choice of materials with a focus on consistently good compatibility. All components were made from phosphate compounds, which are well matched both chemically and mechanically.
The low current is considered one of the biggest hurdles in the development of solid-state batteries. It is the reason why the batteries take a relatively long...
New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference
Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
17.08.2018 | Event News
08.08.2018 | Event News
27.07.2018 | Event News
21.08.2018 | Power and Electrical Engineering
21.08.2018 | Life Sciences
21.08.2018 | Medical Engineering