ausblenden:
Schlagwörter:
-
MPINP:
Speichertechnik - Abteilung Blaum
Zusammenfassung:
The high-precision Penning-trap mass spectrometer Pentatrap aims at measurements of
mass ratios of highly charged ions with an uncertainty of 10−11 and below. An application
in neutrino physics is the measurement of the mass ratio of 163Ho and 163Dy for the ECHo
collaboration aiming at the determination of an upper limit of the neutrino mass in the
sub-eV range. This master thesis reports on the construction and commissioning of a compact
room-temperature electron beam ion trap (EBIT) providing highly charged ions of 163Ho for
the Pentatrap experiment. For the efficient injection of very small samples of the synthetic
radioisotope 163Ho in the range of tens of ng into the EBIT a setup employing the wire probe
injection technique was developed and constructed. For the first tests, the EBIT is integrated
into a test setup including a Wien filter and an MCP detector as diagnostic equipment for
commissioning. Through injection of argon gas, the Wien filter was calibrated and used
for the identification of the charge states of extracted xenon ions. Simulations of the charge
state evolution for argon and holmium have been performed showing a good agreement with
the measurements in the case of argon and giving an estimate of the reachable charge states
for holmium. Finally, the developed wire probe injection setup was taken into operation and
the first measurements using a gold coated copper wire as wire probe are presented.
