A research team composed of Osaka University, Hiroshima University, etc. published a paper in the "Science" magazine (electronic version) published on February 13th, saying that it has successfully used the previous 1% intensity laser pointer to achieve efficient acceleration of ions Wait for particles.
The technology can be used to accelerate ions to treat cancer and other diseases using radiation, and can also be used to accelerate neutrons and inspect their interior without damaging the concrete structure. The research team said that it was generally believed that the accelerated particles need to focus the beam in a very small area instantly, so the laser intensity must be increased.
However, the team used the world’s largest high-power laser device "LFEX" of the Suita Campus of Osaka University (Suita City, Osaka Prefecture) during the irradiation test and found that after a long irradiation time (6 picoseconds, one (Sixths of a trillion), the temperature of the "plasma" that separates the material into electrons and ions is raised by laser irradiation, and the ions accelerate. This phenomenon is named "time method effect".
Yu Yujuewen, an associate professor at Osaka University, introduced the world's largest high-power green laser pointer device "LFEX". (Kyodo News Agency) Using this method, the Japanese research team successfully achieved the effect of accelerating ions to 25% of the speed of light with the laser intensity of 1% in the past. Yu Yujuewen, a member of the panel, an expert in laser plasma technology and an associate professor at Osaka University, said: "Although the efficiency has been greatly improved, it needs to be further accelerated for practical application. In addition, this technological breakthrough will help the miniaturization of laser devices and cut costs."