Solar Hidden Photon Search
  The Solar Hidden Photon Search (SHIPS) is a joint astroparticle project of the Hamburger Sternwarte and DESY. The main target is to detect the solar emission of a new species of particles, so called Hidden Photons (HPs). Due to kinetic mixing, photons and HPs can convert into each other as they propagate. A small number of solar HPs - originating from photon to HP oscillations in the interior of the Sun - can be converted into photons in a long vacuum pipe pointing to the Sun - the SHIPS helioscope. 
Matthias Schwarz, Axel Lindner, Javier Redondo, Andreas Ringwald,   Guenter Wiedemann
astro-ph.IM hep-ex physics.ins-det