Justin Kasper, principal investigator of the SWEAP Investigation, standing
in front of a solar furnace at Odeillo. Curved mirrors focus the Sun's heat,
raising temperatures of sample materials to thousands of degrees. Kasper and
his colleagues used the furnace to test materials that will be used to
construct SWEAP - one of the instruments carried aboard the upcoming Solar
Probe Plus. As it swings near the Sun, the probe will have to withstand
temperatures exceeding 2,550 degrees Fahrenheit, as well as blasts of
radiation and particles.