To obtain such positron microbeam, it is necessary to use objective lenses, which are commonly used in the electron microscopy. We also attempted to form the positron microbeam using a positron beam for the positron diffraction experiment and a SEM optics [6]; [7] ; [8].
Publicly Traded Companies that Benefited from Forced or Slave Labor, 1929-1945 CalPERS
F orced labour played an important role in the Nazi regimeâs Jewish policy as well as for the economy of the concentration camps. Forced labour became particularly important following the outbreak of World War II, when the Nazi war economy demanded an enormous effort.