| 摘要 |
PROBLEM TO BE SOLVED: To provide a time-of-flight mass spectrometer capable of improving the reproducibility of mass spectrometry by stabilizing the temperature in vacuum by reducing radiant heat transmitted to an ion optical system through a vacuum chamber resulting from a slight temperature change in a thermostat. SOLUTION: Inside the vacuum chamber 10 placed in the thermostat 16, a flight tube 20 is held by a holding member 21 made of a low thermal conductivity material. An ion accelerator 12 and an ion detector 13 (and also a reflectron 14 in the case of a reciprocating type) are fixed to the flight tube 20 and an outer wall of a flight separation section 10b of the vacuum chamber 10 is covered with a heat insulator 27. COPYRIGHT: (C)2006,JPO&NCIPI |
