Patents by Inventor Sei-Da Chen

Sei-Da Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fast-switch undulator and method for polarizing electron beam
    Patent number: 11357095
    Abstract: An undulator is adapted to a synchrotron storage ring or free electron lasers (FEL), especially to an undulator capable of switching polarization mode rapidly. In comparison with the EPU (elliptically polarized undulator) of APPLE II (Advanced Planar Polarized Light Emitter II) which conceived by Dr. S. Sasaki, the provided undulator does not use mechanical transmission mechanisms to drive the four magnetic pole arrays composed of permanent magnets. Hence, the polarization mode can be switched rapidly. Moreover, a polarization method of electron beam is also provided.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: June 7, 2022
    Assignee: NATIONAL SYNCHROTRON RADIATION RESEARCH CENTER
    Inventors: Ching-Shiang Hwang, Sei-Da Chen, Ting-Yi Chung, Jyh-Chyuan Jan
  • FAST-SWITCH UNDULATOR AND METHOD FOR POLARIZING ELECTRON BEAM
    Publication number: 20200352018
    Abstract: An undulator is adapted to a synchrotron storage ring or free electron lasers (FEL), especially to an undulator capable of switching polarization mode rapidly. In comparison with the EPU (elliptically polarized undulator) of APPLE II (Advanced Planar Polarized Light Emitter II) which conceived by Dr. S. Sasaki, the provided undulator does not use mechanical transmission mechanisms to drive the four magnetic pole arrays composed of permanent magnets. Hence, the polarization mode can be switched rapidly. Moreover, a polarization method of electron beam is also provided.
    Type: Application
    Filed: May 29, 2019
    Publication date: November 5, 2020
    Applicant: National Synchrotron Radiation Research Center
    Inventors: Ching-Shiang Hwang, Sei-Da Chen, Ting-Yi Chung, Jyh-Chyuan Jan