公开(公告)号：US20250104991A1

公开(公告)日：2025-03-27

申请号：US18294198

申请日：2022-06-23

Applicant: Hitachi High-Tech Corporation

Inventor： Kouji ISHIGURO ,  Shinsuke MINATA ,  Hiroyuki YASUDA ,  Tsugunao TOMA ,  Yuka SUGAWARA

IPC: H01J49/42 ,  G01K7/02 ,  G01K7/16

Abstract: To provide a mass spectrometer in which a mass axis deviation can be prevented by having a relatively inexpensive configuration. The mass spectrometer includes: a mass filter including rod electrodes, a holder for holding the rod electrodes, a holder support base on which the holder is placed, and a leaf spring configured to press the holder with an elastic force to fix the holder to the holder support base; a temperature sensor; and a control unit configured to control, based on a measurement signal of the temperature sensor, a voltage value of a high frequency voltage applied to the rod electrodes, in which the temperature sensor is fixed to the leaf spring.

公开(公告)号：US20240339312A1

公开(公告)日：2024-10-10

申请号：US18713248

申请日：2022-10-12

Applicant: Hitachi High-Tech Corporation

Inventor： Tsugunao TOMA ,  Riku TAMURA ,  Hiroyuki YASUDA ,  Masuyuki SUGIYAMA ,  Yuichiro HASHIMOTO

IPC: H01J49/00 ,  H01J49/42

CPC classification number: H01J49/0036 ,  H01J49/421 ,  H01J49/4265

Abstract: An object of the present disclosure is to provide a method for controlling a mass analyzer. According to the method, sensitivity reduction in a high ion concentration region can be prevented without changing a dwell time for each data point. In the method for controlling a mass analyzer according to the present disclosure, starting collecting data is executed at the same time interval, and a time length for collecting the data varies depending on a degree of space charge generated in a prefilter or a degree of sensitivity reduction of the mass analyzer caused by the space charge.