Patent ID: 9048060
Filing Date: 2015-06-02
Classification: H01J

Abstract:
1. A charged-particle microscope comprising: a charged-particle source, for producing a beam of charged particles that propagates along a particle-optical axis; a sample holder, for holding and positioning a sample; a charged-particle lens system, for directing said beam onto the sample held by the sample holder; a detector, for detecting radiation emanating from the sample as a result of its interaction with the beam; a beam pulsing device, for causing the beam to repeatedly switch on and off so as to produce a pulsed beam; and an oscillating power supply connected to the beam pulsing device, wherein the beam pulsing device comprises a unitary resonant cavity disposed about said particle-optical axis and having an entrance aperture and an exit aperture for the beam, the unitary resonant cavity being configured to independently adjust a pulse length and a pulse frequency of the pulsed beam by: