mass deflector

1
Mass Separator
From the REXEBIS a wide variety of ions emerges,
not only highly charged ions of the desired
isotope type that was injected. This is due to
residual gas contamination inside the REXEBIS
that also are ionized in the electron beam. As
the intensity of the radioactive ions can be much
smaller than the residual gas intensity, a Mass
Separator is required.

• Theory
• Due to the potential depression of the REXEBIS
  electron beam, the extracted ions will have an
  energy spread, which limits the q/A-resolution of
  an ordinary magnetic separator to about 200.
  Instead a Nier-spectrometer will be used.

The Mass Separator consists of an electrostatic
90 cylinder deflector and a 90 magnetic bender
built up in a vertical S-shape. The
electrostatic deflector separates the ions
according to their energies irrespective of their
masses to a focal plane (SE). The correct
charge-to-mass ratio is selected in the focal
plane of the bending magnet (SM).

• Mass selector data
• q/A-resolution 300

QS quadrupole singletQD quadrupole
doubletED electrostatic deflectorD
deflecting magnet
Nier-spectrometer