  We report on the detection by means of Raman spectroscopy of amorphous
beryllium deuteride, BeD 2 , in magnetron sputtered deposits synthesized in two
different laboratories and containing about 20 at.% of deuterium. In contrast,
this signature has not been found for the JET limiter samples studied coming
from the inner, outer or upper limiters, even when coming from a deposition
zone of the limiters. We give a way to disentangle that BeD 2 signature from
other signatures falling in the same spectroscopic range and mainly related to
other phenomena. We also analyze the Raman characteristics of the JET sample
defects. These results could help in the interpretation of D thermal desorption
spectra and in future analyses of JET thick Be deposit divertor tiles.
