Patent ID: 11898975
Assignee: TOHOKU UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G

Claim 0:
1. An electron spectrometer comprising:
an excitation part irradiating a sample with an energy beam;
an orbiting part causing electrons emitted from the sample irradiated with the energy beam to orbit; and
a detection part detecting the electrons released from the orbiting part, wherein
the orbiting part includes a plurality of pairs of electrodes,
the plurality of pairs of electrodes cause the electrons to orbit when an applied voltage is controlled,
a part of the plurality of pairs of electrodes are pairs of electrodes to catch which catch the electrons into the orbiting part when an applied voltage is controlled, and
a part of the plurality of pairs of electrodes are pairs of electrodes to release which release the electrons from the orbiting part when an applied voltage is controlled; and
further comprising a bunch compression part which reduces a time spread of an electron bunch, which is a bunch of electrons, by changing at least one of a velocity and a trajectory of the electrons.