US 11,887,833 B2
Ion trap mass spectrometer, mass spectrometry method and non-transitory computer readable medium storing control program
Shinichi Iwamoto, Kyoto (JP); and Sadanori Sekiya, Kyoto (JP)
Assigned to SHIMADZU CORPORATION, Kyoto (JP)
Appl. No. 17/638,062
Filed by SHIMADZU CORPORATION, Kyoto (JP)
PCT Filed Jun. 4, 2020, PCT No. PCT/JP2020/022208
§ 371(c)(1), (2) Date Feb. 24, 2022,
PCT Pub. No. WO2021/059600, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 2019-177979 (JP), filed on Sep. 27, 2019.
Prior Publication US 2022/0277951 A1, Sep. 1, 2022
Int. Cl. H01J 49/42 (2006.01)
CPC H01J 49/4265 (2013.01) 7 Claims
OG exemplary drawing
 
1. An ion trap mass spectrometer comprising:
an ion trap including a first electrode and a second electrode different from the first electrode;
a first voltage controller that periodically switches a DC voltage among DC voltages having a plurality of different values and apply the DC voltages to the first electrode; and
a second voltage controller that applies a sine-wave voltage to the second electrode when ions captured in the ion trap are dissociated,
wherein the first voltage controller captures the ions in the ion trap by applying a square-wave voltage to the first electrode.