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Mass Separator

Mass Separator.

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Mass Separator

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  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 Separatorconsists 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

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