Evaluation of C/C ratio measurements using accelerator mass spectrometry with standard materials under different graphitization conditions.

In this study, an evaluation of carbon-beam tuning and C/C ratio measurements is performed to validate the graphitization process in the pre-processing procedure employed at the accelerator mass spectrometry (AMS) facility of Dongguk University in Korea. The AMS isotopic ratio data are analyzed for samples subjected to three different graphitization conditions: (1) the entire process including Fe catalyst pre-heating with a high vacuum, (2) a high vacuum without pre-heating, and (3) a low vacuum without pre-heating. High-quality isotopic ratio measurements are achieved under these conditions.

Compact RF ion source for industrial electrostatic ion accelerator.

Korea Multi-purpose Accelerator Complex is developing a single-ended electrostatic ion accelerator to irradiate gaseous ions, such as hydrogen and nitrogen, on materials for industrial applications. ELV type high voltage power supply has been selected. Because of the limited space, electrical power, and robust operation, a 200 MHz RF ion source has been developed.