Solar power plants can contribute to the secure global supply of power from renewable sources. Röger and his team are developing new measuring techniques that will continue to improve not only the solar power plants themselves, but also their efficiency. Throughout his doctoral thesis, Marc Röger developed a contactless measuring technique to measure the heat transfer between the receiver (where the Sun's rays are converted into heat) and the air. What was thought to be a mere theory does, in practice, assist in tolerating receiver temperatures in excess of 1000 degrees Celsius without overheating and damaging the materials. Incorrectly positioned reflectors, even if they are just a few millimetres off, reduce the output of a solar power plant.