Table 1
Planned "light shining through a wall" experiments to detect axion-like particles (ALPs), indicating the most important characteristics for the magnet and laser. PVLAS and later OSQAR will use optical cavities to generate more ALPs. PPVLAS denotes the probability of photon-ALP-photon conversion for the different experimental set-ups and the coupling constant derived from the PVLAS measurement and BFRT limits. The last column gives the expected signal rate of reconverted photons.