| Article | |
| Title | Improved Performance of the NIJI-IV Compact VUV/IR FEL and its Application to the Surface Observation |
| Author(s) | Yamada, Kawakatsu ; Ogawa, Hiroshi ; Sei, Norihiro ; Yagi-Watanabe, K ; Yasumoto, Masato |
| Affiliation | (AIST-PRI, Tsukuba, Ibaraki) |
| Publication | 2004 |
| In: | 26th International Free Electron Laser Conference and 11th FEL User Workshop 2004, Trieste, Italy, 29 Aug - 3 Sep 2004, pp.e-proc. THPOS29 |
| Subject category | Accelerators and Storage Rings |
| Abstract | At AIST, efforts to increase the FEL power as well as to shorten the lasing wavelength below 190 nm are being made, to use the NIJI-IV FEL as an intense light source for real-time surface observation using the photoelectron emission microscopy (PEEM). By irradiating a transition-metal surface with the 200-nm FEL, fine structure of one- micron scale was successfully observed with spatial and temporal resolutions of a few hundreds nm and 33 ms, respectively. In addition, a 3.6-m optical klystron for lasing in the infrared was recently installed into the north straight section of the NIJI-IV to extend the lasing wavelength range up to 10 microns. One of our interests in the infrared-FEL application is to utilize it for a Raman spectroscopy which can examine adsorbed molecules and their bonding conditions on the metal surface. Establishment of a total surface analysis system using NIJI-IV compact VUV/IR FEL combined with characteristic surface analysis techniques is one of our goals in the near future. Improved performance of the NIJI-IV FEL obtained this year will be reported. Typical results of the PEEM measurement will be discussed. |
Record created 2006-02-28, last modified 2024-02-23
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Published version from JACoW