Patents by Inventor Nobuyuki Nishimori

Nobuyuki Nishimori 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).

  • Method and a device for realizing both high extraction efficiency of laser light from electron beams and femto-second ultra-short in free-electron lasers pulses
    Patent number: 6970483
    Abstract: A method for realizing both high extraction efficiency of laser light from electron beams and femto-second ultra-short pulses in a free-electron laser, wherein the peak current of electron pulses from a superconducting or normal conducting linear accelerator serving as a driver for the free-electron laser is adjusted to be greater than a certain lower limit and electron beams are brought into perfect synchronism with light or the time of duration for which the electron pulses are repeated is made longer than the time to saturation of light oscillation (the time during which light is emitted due to the increase of optical output by an amount corresponding to the gain up to the point where the optical output does not increase any more), whereby the oscillation of light is facilitated, wherein the extraction efficiency of laser light from electron beams is increased to exceed the theoretical limit which is expressed by 1/(2 Nw)˜1/(4 Nw) (Nw=the number of undulator periods) of electron beam power or rendered prop
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: November 29, 2005
    Assignee: Japan Atomic Energy Research
    Inventors: Eisuke Minehara, Ryoichi Hajima, Nobuyuki Nishimori, Ryoji Nagai
  • Method and a device for realizing both high extraction efficiency of laser light from electron beams and femto-second ultra-short in free-electron lasers pulses
    Publication number: 20030179784
    Abstract: A method for realizing both high extraction efficiency of laser light from electron beams and femto-second ultra-short pulses in a free-electron laser, wherein the peak current of electron pulses from a super-conducting or normal conducting linear accelerator serving as a driver for the free-electron laser is adjusted to be greater than a certain lower limit and electron beams are brought into perfect synchronism with light or the time of duration for which the electron pulses are repeated is made longer than the time to saturation of light oscillation (the time during which light is emitted due to the increase of optical output by an amount corresponding to the gain up to the point where the optical output does not increase any more), whereby the oscillation of light is facilitated, wherein the extraction efficiency of laser light from electron beams is increased to exceed the theoretical limit which is expressed by 1/(2 Nw)˜1/(4 Nw) (Nw=the number of undulator periods) of electron beam power or
    Type: Application
    Filed: March 25, 2002
    Publication date: September 25, 2003
    Applicant: Japan Atomic Energy Research Institute
    Inventors: Eisuke Minehara, Ryoichi Hajima, Nobuyuki Nishimori, Ryoji Nagai