Article XML http://ultralaser.iphy.ac.cn/modules/article/view.article.php/96/c6 2010-07-29T15:16:27+08:00 http://ultralaser.iphy.ac.cn/modules/article/ http://ultralaser.iphy.ac.cn/modules/article/images/logo.png text/html 2009-12-19T17:00:00+08:00 http://ultralaser.iphy.ac.cn/modules/article/ nwang http://ultralaser.iphy.ac.cn/modules/article/view.article.php/96/c6 Category: [sc]ѧÊõ½»Á÷[/sc][en]Academic Cooperations[/en]¹âÎïÀíϵÁÐѧÊõ±¨¸æ£¨ËÄÊ®Áù£©<br /><br />ÌâÄ¿£ºToward the generation of Attosecond keV x-ray pulses driven by Thomson<br />scattering<br /><br />±¨¸æÈË£ºProf. Dong Eon Kim £¨The physics department at POSTECH, Korea.£©<br /> <br />ÕªÒª£º<br />At the beginning of this century, the femtosecond (fs) barrier was broken [3],<br />a door being opened to new opportunities for the study of ultrafast electron<br />dynamics in atoms, moleculesand nano-structured systems that have never been<br />explored before. Attosecond technology has been rapidly progressing in which an<br />isolated sub-100 as pulse was demonstrated [4]. The real time observation of<br />inner-shell processes in atoms [5], tunneling ionization from atoms [6], and<br />bandgap transition of electrons in solid has been observed [7]. The currently<br />available photon energy of attosecond pulses is in the soft x-ray region,<br />30¨C100 eV. Even though these are land-marking experiments, attosecond or a few<br />fs keV pulses are yet to be developed for wider exploration and manipulation of<br />electron dynamics in a vast spectrum of natural phenomena: there is no source<br />available in keV or higher energies faster than 10 fs. In this talk, Prof Kim<br />would like to discuss a new physical scheme to generate attosecond keV x-ray<br />pulses by utilizing the interaction of a fs laser with a relativistic electron<br />beam.<br /><br />[1] D Kim, et al. New Journal of Physics 11, 063050 (2009)<br />[2] Sang-Young Chung, et al. Optics Express 17, 7853-7861 (2009)<br />[3] Hentschel M et al, Nature 414 509 (2001)<br />[4] Goulielmakis E et al , Science 320 1614 (2008) <br />[5] Drescher M et al ,Nature 419 803 (2002)<br />[6] Uiberacker M et al, Nature 446 627(2007)<br />[7] Cavalieri A L et al , Nature 449 1029 (2007)<br /><br />Prof. Dong Eon Kim ¼ò½é£º <br />Prof Dong Eon Kim obtained M.A and Ph.D degrees from Princeton University in<br />1984 and 1989 respectively. From March 1989 to July 1991, has was a research<br />associate in Princeton University and as a consultant in Princeton X-Ray Laser,<br />Inc. Since 1991 he has been working in the physics department at POSTECH, Korea.<br /> Prof Kim¡¯s research activities include interaction of high power femtosecond<br />laser with matters, inner-shell X-ray laser, small-scale soft X-ray laser, X-<br />ray optical properties of multilayered thin films,spectroscopic study of gas-<br />puff Z-Pinch dynamics etc. He accepted many awards and honors such as SeoAhm<br />Fellowship (SeoAhm Scholarship Foundation), nominated to Simon Ramo Award (<br />American Physical Society) and Princeton Honorific Fellowship (Princeton<br />University), Korean Honor Fellowship,Princeton University Merit Prize, Natural<br />Science College Award (Seoul National University).<br /><br />ʱ¼ä£º2009Äê12ÔÂ21ÈÕ£¨ÐÇÆÚÒ»£©ÉÏÎç10£º00 <br /> <br />µØµã£ºÖпÆÔºÎïÀíÑо¿ËùBÂ¥¶þ¶Î402»áÒéÊÒ<br /><br />ÁªÏµÈË£ºÎºÖ¾Òå Ñо¿Ô± £¨Tel£º82648115£©<br /> ½ð¿ü¾ê Ñо¿Ô± £¨Tel£º82648099£©<br /><br />Ö÷°ìµ¥Î»£ºÖйú¿ÆѧԺ¹âÎïÀíÖصãʵÑéÊÒ<br />