The BaBar detector is a multilayer particle detector. ANAIS is a particle detector experiment designed to detect dark matter. The interplanetary bus carried a solar wind charged particle detector and a cosmic ray detector. The resulting subatomic interactions are then studied in a surrounding particle detector. Another experiment uses the Earth's mantle as a giant particle detector, focusing on geoelectrons. The term bolometer is also used in particle physics to designate an unconventional particle detector. Simpson's first particle detector was launched in 1958 on spacecraft Pioneer 2. ALEPH was a particle detector at the Large Electron-Positron collider (LEP). JADE was a particle detector at the particle accelerator PETRA at DESY, Hamburg. A Resistive plate chamber (RPC) is a particle detector widely used in high energy physics.