JMSSJ On-line

JMSSJ On-line, Vol. 48 (2000) No. 5, pp. 357-359

Development of a Potential-Lift Ion Source		>> Full Text PDF >> References
*Daisuke OKUMURA^a), Kousuke KUMONDAI^a), Shin-ichi YAMAGUCHI^a) Michisato TOYODA^a), Morio ISHIHARA^a), and Itsuo KATAKUSE^a)** ^† This paper is dedicated to the memory of the late Professor Takekiyo MATSUO. ^a) Department of Physics, Graduate School of Science, Osaka University (1-16 Machikaneyama, Toyonaka, Osaka 560-0043, Japan)*

Generally, an ion source is supplied with high voltage to accelerate ions. However, the high voltage on the ion source makes some difficulties in applying pulse voltage or introducing samples, etc. We developed a new ion source to solve these problems. This new ion source consists of a grounded ionization region, an acceleration region and a cylinder. While the electric potential of the cylinder is varied, the electric field in the cylinder does not change and the kinetic energy of the ions in the cylinder is independent of the potential of the cylinder. After the ions formed in the ion source at the ground potential go into the cylinder at the accelerating potential, the electric potential of the cylinder is varied from the accelerating potential to the ground potential. By this method, ions keep accelerated velocity after the cylinder. To confirm this idea, we constructed a time-of-flight (TOF) mass spectrometer having an ion source and an analyzer, both of which are at the ground potential.

Key words: Time-of-flight mass spectrometer, Ion source, Potential-lift ion source

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