1:30 PM - 1:45 PM [16p-Z34-2] Present states of TCU-Tandem (2019-2020)- Improvement of cold cathode negative ion-source and development of WDS-PIXE - 〇Naoto Hagura1, Yoshiyuki Oguri2, So Watanabe3 (1.TCU, 2.Tokyo Tech, 3.JAEA)