An off-line ion guide quadrupole mass spectrometer system
Off-line ioniohjain kvadrupolimassaspektrometri systeemi.
Uuden erillisen ioniohjain-kvadrupolimassaspektrometri (IGQMS) -systeemin käyttöönotto on esitetty tässä työssä. Laitteisto on kehitetty
uusien tekniikoiden testaamiseen ja kehittämiseen IGISOL–laitoksella. Työssä
on tutkittu laitteiston differentiaalista pumpaussysteemiä ja laitteiston
etuosan kuljetustehokkuutta käyttäen 223Ra alfa-rekyylilähdettä. Painemittausten
tulokset eri parametreilla ovat esitetty. Kaasuohjaimen käyttöpainealue on mitattu olevan 1 ja 700 mbar:n välillä pitäen käyttöpaineen
QMS kammiossa, ja skimmer-systeemin läpäisytehokkuus olevan lähellä
100 %. The commissioning of a new off-line ion guide quadrupole mass spectrometer
(IGQMS) system, an off-line platform for the testing and development
of new techniques to be implemented at the IGISOL–facility, is
presented in this thesis. The differential pumping system is investigated
and results of efficiency measurements of the front part of the system using
a 223Ra alpha-recoil source are presented. Operational gas cell pressures
from 1 up to 700 mbar have been demonstrated while maintaining
operational pressure in the QMS chamber. A range of pressure measurements
with different parameters is presented, and a transport efficiency
through a squeezer-skimmer system of nearly 100 % has been measured.
Asiasanat
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