@article{oai:nagoya.repo.nii.ac.jp:00012809,
 author = {加藤, 丈典 and 鈴木, 和博 and KATO, Takenori and Suzuki, Kazuhiro},
 journal = {名古屋大学加速器質量分析計業績報告書},
 month = {Mar},
 note = {The CHIME dating is performed using two electron microprobe (EMP) equipments (JCXA- 733, JEOL, Tokyo) at Center for Chronological Research, Nagoya University. The one equips four wavelength dispersive spectrometers (WDS) and the other does three WDS. Those EMP equipments have been customized by the authors for improvement: stability, sensitivity, wavelength resolution etc. Two customized analyzing crystals are installed the EMP to improve wavelength resolution. The customized PET crystal achieves 2.9 eV FWHM for P Kαline while normal crystal does 3.8 eV. This improvement significantly reduces uncertainty from X-ray interference correction. The backscattered electron image (BEI) system of EMP has been improved to obtain clear BEI in the rapid scan mode. The improved system provides quick search of target minerals in a thin section sample during the course of determination of analysis positions. The scan and image systems have completely replaced with the digital system developed by the authors. The new system supports up to 2560 x 1920 pixels image capture (secondary electron, backscattered electron etc.) with 8-bits resolution. A captured image is stored in the TIFF format with date, magnification and scale bar. Until the end of May 2008, we were not able to use EMP because the building is closed for quake-proof engineering. The EMP equipments was overhauled and configured for the CHIME dating in June and July. The one EMP showed no serious problem and we have restarted the CHIME dating from August. The other EMP showed serious problems: cable damage, leakage of lens-cooling oil, system board crash of controlling workstation etc. Therefore, we were not able to use this EMP until the end of October. For above conditions, the uptime of EMP in 2008 is about 1000 hours while normal uptime is 2000 -4000 hours a year., 第21回名古屋大学年代測定総合研究センターシンポジウム平成20(2008)年度報告},
 pages = {31--38},
 title = {CHIMEの現状と稼働状況(2008年度)},
 volume = {20},
 year = {2009}
}