Author/Authors :
Schmidt-Wellenburg، نويسنده , , P. and Andersen، نويسنده , , K.H. and Courtois، نويسنده , , P. and Kreuz، نويسنده , , M. and Mironov، نويسنده , , S. and Nesvizhevsky، نويسنده , , V.V. and Pignol، نويسنده , , G. and Protasov، نويسنده , , K.V. and Soldner، نويسنده , , T. and Vezzu، نويسنده , , F. and Zimmer، نويسنده , , O.، نويسنده ,
Abstract :
The gravitational spectrometer GRANIT will be set up at the Institut Laue Langevin. It will profit from the high ultracold neutron density produced by a dedicated source. A monochromator made of crystals from graphite intercalated with potassium will provide a neutron beam with 8.9 Å incident on the source. The source employs superthermal conversion of cold neutrons in superfluid helium, in a vessel made from BeO ceramics with Be windows. A special extraction technique has been tested which feeds the spectrometer only with neutrons with a vertical velocity component v ⊥ ≤ 20 cm s - 1 , thus keeping the density in the source high. This new source is expected to provide a density of up to ρ = 800 cm - 3 for the spectrometer.
