Japan Atomic Energy Agency

Kabushiki Kaisha Toshiba

Ushio Denki Kabushiki Kaisha

Hiroyuki Daido

Hiromitsu Kiriyama

Yukio Yasuda

Akira Noda

Takeshi Yoshiyuki

Yasushi Iseki

Toshio Yokota

Masayuki Suzuki

Shuji Kondo

Hajime Okada

Izuru Daito

Masahiro Ikegami

Mamiko Nishiuchi

Michiaki Mori

Shuhei Kanazawa

A high pressure discharge lamp has a sealing portion that is made of glass and a sealing metal piece. In a method of manufacturing the high pressure discharge lamp, the sealing metal piece is irradiated with laser beam whose pulse width is 1&#xd7;10seconds or less, so as to carry out a surface treatment of the sealing metal piece. The sealing metal piece may have a groove that is 120 to 600 nm in depth and 450 to 1,200 nm in width.

High pressure discharge lamp and method of manufacturing high pressure discharge lamp

A laser-driven particle beam irradiation apparatus includes: a particle beam generator irradiating a target with pulsed laser light to emit a laser-driven particle ray; a beam converging unit forming a transportation path which guides the emitted laser-driven particle ray to an object and spatially converging the laser-driven particle ray; an energy selector selecting an energy and an energy width of the laser-driven particle ray; an irradiation port causing the laser-driven particle ray to scan the object to adjust an irradiation position in the object; and an irradiation controller controlling operation of the particle beam generator, the beam converging unit, the energy selector and the irradiation port. The beam converging unit generates a magnetic field on a trajectory of the laser-driven particle ray and converging the laser-driven particle ray by the magnetic field, the magnetic field forcing divergence components of the laser-driven particle ray that go away from a center of the trajectory back to the center of the trajectory.

Laser-driven particle beam irradiation apparatus and method

In the improved method for increasing the contrast of a high-intensity laser, signal light outputted from a laser oscillator, a preamplifier or the like is amplified by OPCPA which is excited by pump light having a short pulse width comparable to that of the signal light, thereby producing an extremely high contrast.

Method of increasing the contrast of a high-intensity laser

Growing community of inventors

Fukui, Japan

Hiroyuki Daido