公开(公告)号：US20200343013A1

公开(公告)日：2020-10-29

申请号：US16662434

申请日：2019-10-24

Applicant: Euclid Techlabs, LLC

Inventor： Chunguang Jing ,  Jiaqi Qiu ,  Ao Liu ,  Eric John Montgomery ,  Yubin Zhao ,  Wade Rush ,  Roman Kostin ,  Alexei Kanareykin

IPC: G21K1/04 ,  H01J37/26

Abstract: An electromagnetic mechanical pulser implements a transverse wave metallic comb stripline TWMCS kicker having inwardly opposing teeth that retards a phase velocity of an RF traveling wave to match the kinetic velocity of a continuous electron beam, causing the beam to oscillate before being chopped into pulses by an aperture. The RF phase velocity is substantially independent of RF frequency and amplitude, thereby enabling independent tuning of the electron pulse widths and repetition rate. The TWMCS further comprises an electron pulse picker (EPP) that applies a pulsed transverse electric field across the TWMCS to deflect electrons out of the beam, allowing only selected electrons and/or groups of electrons to pass through. The EPP pulses can be synchronized with the RF traveling wave and/or with a pumping trigger of a transverse electron microscope (TEM), for example to obtain dynamic TEM images in real time.

公开(公告)号：US10804001B1

公开(公告)日：2020-10-13

申请号：US16662434

申请日：2019-10-24

Applicant: Euclid Techlabs, LLC

Inventor： Chunguang Jing ,  Jiaqi Qiu ,  Ao Liu ,  Eric John Montgomery ,  Yubin Zhao ,  Wade Rush ,  Roman Kostin ,  Alexei Kanareykin

IPC: G21K1/04 ,  H01J37/26

Abstract: An electromagnetic mechanical pulser implements a transverse wave metallic comb stripline TWMCS kicker having inwardly opposing teeth that retards a phase velocity of an RF traveling wave to match the kinetic velocity of a continuous electron beam, causing the beam to oscillate before being chopped into pulses by an aperture. The RF phase velocity is substantially independent of RF frequency and amplitude, thereby enabling independent tuning of the electron pulse widths and repetition rate. The TWMCS further comprises an electron pulse picker (EPP) that applies a pulsed transverse electric field across the TWMCS to deflect electrons out of the beam, allowing only selected electrons and/or groups of electrons to pass through. The EPP pulses can be synchronized with the RF traveling wave and/or with a pumping trigger of a transverse electron microscope (TEM), for example to obtain dynamic TEM images in real time.

公开(公告)号：US10515733B1

公开(公告)日：2019-12-24

申请号：US16393469

申请日：2019-04-24

Applicant: Euclid Techlabs, LLC

Inventor： Chunguang Jing ,  Jiaqi Qiu ,  Ao Liu ,  Eric John Montgomery ,  Yubin Zhao ,  Wade Rush ,  Roman Kostin ,  Alexei Kanareykin

IPC: G21K1/04

Abstract: An electromagnetic mechanical pulser implements a transverse wave metallic comb stripline TWMCS kicker having inwardly opposing teeth structured to retard a phase velocity of an RF traveling wave propagated therethrough to match the kinetic velocity of a continuous electron beam simultaneously propagated therethrough. The kicker imposes transverse oscillations onto the beam, which is subsequently chopped into pulses by an aperture. The RF phase velocity is substantially independent of RF frequency and amplitude, thereby enabling independent tuning of the electron pulse widths and repetition rate. The exterior surface of the kicker is conductive, thereby avoiding electron charging. In embodiments, various elements of the kicker and/or aperture can be mechanically varied to provide further tuning of the pulsed electron beam. A divergence suppression section can include a mirror TWMCS and/or magnetic quadrupoles. RF can be applied to a down-selecting TWMCS downstream of the aperture to reduce the pulse repetition rate.