The new FLUTE facilitiy (name abbreviation derived from its German name: Ferninfrarot Linac- und Test-Experiment) at the Karlsruhe Institute of Technology (KIT) will serve as an accelerator test facility for a variety of accelerator physics studies. The facility is developed and operated by the Institute for Beam Physics and Technology (IBPT).

The core accelerator consists of a femtosecond chirped laser-driven photo-injector, a linear accelerator (linac) and an electron bunch compressor to provide ultra-short electron bunches. This compact versatile linear accelerator will also provide coherent radiation in ultra-short, very intense, light pulses spanning the terahertz and far-infrared spectral range and beyond. FLUTE also provides an infrastruture for picosecond and femtosecond electron and photon beam studies to enable future application-oriented research from materials to life sciences and innovative technology solutions such as advanced electron and photon beam diagnostics.