Development of a new device control system for β-NMR experiments

• Published in: Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Vol. 317; pp. 705 - 709
• Main Authors: Yoshida, N., Ueno, H., Yoshimi, A., Ishibashi, Y., Ichikawa, Y., Abe, Y., Asahi, K., Chikamori, M., Fujita, T., Furukawa, T., Hikota, E., Nagae, D., Ohtomo, Y., Saito, Y., Shirai, H., Suzuki, T., Yang, X.F.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.12.2013
• Subjects: Adiabatic fast passage method; Control systems; Dynamical systems; Dynamics; Electromagnetic moments; High-power radio-frequency oscillating field; Magnetic fields; Modules; Radioactive isotopes; Resonant frequencies; Switches; β-NMR; β-NMR; High-power radio-frequency oscillating field; Adiabatic fast passage method; Electromagnetic moments
• ISSN: 0168-583X; 1872-9584; 1872-9584
• DOI: 10.1016/j.nimb.2013.08.057

•We developed a device-control system of a β-NMR apparatus. •High-voltage and fast-relay switches were introduced to the NMR apparatus. •Wide NMR frequency scans were realized by dynamically switching tank circuits. •A programmable sequence module was developed to control the switch system. •The entire β-NMR circuit was simplified with a new programmables logic module. We have developed a device-control system of a β-NMR apparatus for the measurement of nuclear electromagnetic nuclear moments of rare isotopes. In this development, we installed fast relay switches into a high-power tank circuit in order to apply a strong oscillating magnetic field and to sweep its frequency as wide as possible. The system enables to conduct NMR frequency scans with wide frequency windows by dynamically changing the tank-circuit resonant frequency. Furthermore, logical electric-circuit modules of the data taking system were replaced by a programmable logic module. The system performance was evaluated in the β-NMR experiments conducted at the RIBF facility using 20F and 33Cl radioactive isotopes.