  The ASACUSA-Cusp collaboration has recently upgraded the positron system to
improve the production of antihydrogen. Previously, the experiment suffered
from contamination of the vacuum in the antihydrogen production trap due to the
transfer of positrons from the high pressure region of a buffer gas trap. This
contamination reduced the lifetime of antiprotons. By adding a new positron
accumulator and therefore decreasing the number of transfer cycles, the
contamination of the vacuum has been reduced. Further to this, a new rare gas
moderator and buffer gas trap, previously used at the Aarhus University, were
installed. Measurements from Aarhus suggested that the number of positrons
could be increased by a factor of four in comparison to the old system used at
CERN. This would mean a reduction of the time needed for accumulating a
sufficient number of positrons (of the order of a few million) for an
antihydrogen production cycle. Initial tests have shown that the new system
yields a comparable number of positrons to the old system.
