JMSSJ On-line

JMSSJ On-line, Vol. 48 (2000) No. 5, pp. 312-317

Development of a Multi-Turn Time-of-Flight Mass Spectrometer 'MULTUM Linear plus'		>> Full Text PDF >> References
*Michisato TOYODA^a), Daisuke OKUMURA^a), Shin-ichi YAMAGUCHI^a), Morio ISHIHARA^a), Itsuo KATAKUSE^a), and Takekiyo MATSUO^a)** ^† This paper is dedicated to the memory of the late Professor Takekiyo MATSUO. ^a) TEL: 06-6850-5748, FAX: 06-6850-5764, E-mail: toyodam@phys.wani.osaka-u.ac.jp Department of Physics, Graduate School of Science, Osaka University (1-16 Machikaneyama, Toyonaka, Osaka 560-0043, Japan)*

A new type of multi-turn time-of-flight (TOF) mass spectrometer was constructed, consisting of four cylindrical electric sectors and 28 electric quadrupole lenses, the size of the vacuum chamber being 60 cm×70 cm×20 cm. As the mass resolution of a TOF mass spectrometer is proportional to the path length, it will be necessary to use multi-turn optics in order to achieve the desired resolution within the physical limitations imposed by the spacecraft. It was demonstrated that the mass resolution can be increased according to the number of cycles of the ions through the ion optical system. The mass resolution was 68,000 (m/z= 28, FWHM) after 150.5 cycles.

Key words: Multi-turn time-of-flight mass spectrometer, High resolution, Ion optics