The University of Tokyo

Ihi Corporation

National Institute of Radiological Sciences

Daisuke Ishida

Hiroyuki Nose

Namio Kaneko

Mitsuru Uesaka

Katsuhiro Dobashi

Fumito Sakamoto

Yasuo Sakai

Hisaharu Sakae

Masashi Yamamoto

Atsushi Fukasawa

An X-ray waveform is generated by validating detection data corresponding to when an X-ray () is generated at a collision point () among X-ray detection data and invalidating other data. For example, when laser light () is pulse laser light and an electron beam () is a continuous electron beam or a pulse-like electron beam having a pulse width equal to or greater than that of the pulse laser light, the X-ray waveform is generated by detecting the laser light () and multiplying the X-ray detection data by laser light detection data after making time axes coincident with respect to the collision point ().

X-ray metering apparatus, and X-ray metering method

A charged particle beam decelerating device includes a high-frequency cavityprovided on an orbit of a charged particle beam, and a phase synchronizing devicefor synchronizing the charged particle beamin the high-frequency cavity with a phase of a high-frequency electric field. By moving the high-frequency cavityor changing an orbit length of the charged particle beam, the charged particle beam in the high-frequency cavity is synchronized with a phase of the high-frequency electric field

Charged particle beam decelerating device and method, and X-ray generating apparatus using the same

A high brightness X-ray generator and a high brightness X-ray generating method are provided which are able to promote an increase in X-ray brightness (i.e., an increase in an X-ray output) while suppressing an excessive increase in the cost of optical elements such as a laser unit, a mirror, and a lens. A high brightness X-ray generator generates an X-ray by inverse Compton scattering by colliding an electron beam with pulse laser light. There are provided a plurality of pulse laser units (A,B) which emits a plurality of pulse laser lights (a,b ) in predetermined periods, an optical-path matching unit () which matches optical paths of the plurality of pulse laser lights, and a timing control unit () which controls timings of the optical-path matching unit and the pulse laser units, wherein the plurality of pulse laser lights is emitted from the same optical path at different timings.

High brightness X-ray generating device and method

An electron beam detection device () is arranged on an electron beam passing path so that a beam delay time tfrom a passing moment of an electron beam () to a moment when the beam reaches a predicted collision point () is longer than a laser delay time tfrom a moment when a command for generating laser light () is issued to the moment when the laser light reaches the predicted collision point () by at least a predetermined delay time &#x394;t. The device () may detect passing therethrough without affecting the electron beam and output a laser light generation command from a laser light command delay circuit () when the predetermined delay time &#x394;t (=t&#x2212;t) has elapsed after the detection.

Device and method for adjusting collision timing between electron beam and laser light

A device for measuring profiles of an electron beam and a laser beam is provided with a profile measuring devicefor measuring cross-section profiles of the beams in the vicinity of a collision position where an electron beamand a laser beamare brought into frontal collision, and a moving devicefor continuously moving the profile measuring device in a predetermined direction which substantially coincides with the axial directions of the beams. Furthermore, based on the cross-section profiles measured by the profile measuring device, the position of the profile measuring device in the predetermined direction, and the oscillation timings of the beams, temporal changes in three-dimensional profiles of the electron beam and the laser beam are created by a profile creating device

Device and method for measuring profiles of electron beam and laser beam

A multi-color X-ray generator includes an electron beam generatorwhich accelerates an electron beam to generate a pulse electron beamand which transmits the beam along a predetermined rectilinear orbit, a composite laser generatorwhich successively generates a plurality of pulse laser lightshaving different wavelengths, and a laser light introduction devicewhich introduces the pulse laser lights along the rectilinear orbitto be opposed to the pulse electron beam, so that the plurality of pulse laser lightssuccessively head-on collide with the pulse electron beamalong the rectilinear orbitso as to generate two or more types of monochromatic hard X-rays().

Multi-color X-ray generator

There is disclosed a device including: an electron beam generation devicewhich accelerates a pulse electron beamto transmit the beam through a predetermined rectilinear orbit; a laser generation devicewhich generates a pulse laser light; a laser light introduction devicewhich introduces the pulse laser lightonto the rectilinear orbitso as to collide with the pulse electron beam; a metal targetwhich generates a particular X-rayby collision with the pulse electron beam: and a target moving devicecapable of moving the metal target between a collision positionon the rectilinear orbit and a retreat position out of the orbit.

Growing community of inventors

Tokyo, Japan

Daisuke Ishida