Systems and methods for fourier transform electrostatic ion trap with microchannel plate detector

A method for mass spectrometry, the method comprising:

• in an electrostatic linear ion trap (ELIT) comprising an image current detector disposed at least partially around a central axis of the ELIT and an electron multiplier detector arranged in an opening of the image current detector:
• introducing ions into the ELIT;
• and deflecting at least a portion of the ions into the electron multiplier detector and wherein the electron multiplier detector has a front surface that is perpendicular to the central axis of the ELIT.

A mass spectrometer system comprising:

• an electrostatic linear ion trap (ELIT) comprising a central axis along which ions travel;
• an image current detector disposed at least partially around the central axis of the ELIT;
• and an electron multiplier detector arranged in an opening of the image current detector, the electron multiplier detector being operable to receive ions deflected from the central axis and wherein the electron multiplier detector comprises two separate elements at non-normal angles to the central axis of the ELIT.