[en] In order to manufacture a carbon nanotube (CNT) tip in which the attachment angle and position of CNT were precisely adjusted, a nanomanipulator was installed inside a scanning electron microscope (SEM). A CNT tip, atomic force microscopy (AFM) probe to which a nanotube is attached, is known to be the most appropriate probe for measuring the shape of high aspect ratio. The developed nanomanipulator has two sets of modules with the degree of freedom of three-directional rectilinear motion and one-directional rotational motion at an accuracy of tens of nanometers, so it enables the manufacturing of more accurate CNT tips. The present study developed a CNT tip with the error of attachment angle less then 10 deg. through three-dimensional operation of a multiwalled carbon nanotube and an AFM probe inside a SEM

[en] Korea has been developing the metal hydride beds for the ITER storage and delivery system (SDS). There are two major concerns for the bed: one is the rapid delivery/recovery rate according to the tokamak plasma operation scenarios, and the other is the accurate measurement of tritium inventory using in-bed calorimetry within limited time. One of the bed concepts considering now consists of the thin and double layers of ZrCo which are confined by the cylinder-shaped SUS filter and the primary vessel wall. The primary vessel wall is wound by the heating coils, and has the helium channels for the in-bed calorimetry. In this study, the three-dimensional thermo-hydraulic analysis is performed for the bed to investigate the in-bed calorimetry performance. Based on the transient simulation results with an assumption of complete removal of the decay heat by He-loop, it is found that the bed under pre-cooling condition satisfies the accountancy of ±1 g-T accuracy in 24 h and ±3 g-T accuracy in 8 h.