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Toyama-shi, Japan

Uchida T.,Toyo University | Minezaki H.,Toyo University | Oshima K.,Toyo University | Racz R.,Institute of Nuclear Research ATOMKI | And 6 more authors.
Review of Scientific Instruments | Year: 2012

The beam transport of N+ ion and C60+ ion in the Bio-Nano ECRIS with min-B configuration was investigated based on the ion beam profiles. The N+ beam could be focused under the low-beam current conditions. Also the C60+ beam could be focused in spite of the large space-charge effect which will lead the divergence of the beam. We confirmed that our beam transport system works well even for the C 60+ ion beam. We estimated the highest C60 + beam current with the focused beam profile by comparing the N + ion beam. © 2012 American Institute of Physics.

Rehman M.U.,University of Toyama | Jawaid P.,University of Toyama | Uchiyama H.,Tateyama Machine Co. | Kondo T.,University of Toyama
Archives of Biochemistry and Biophysics | Year: 2016

Plasma medicine is increasingly recognized interdisciplinary field combining engineering, physics, biochemistry and life sciences. Plasma is classified into two categories based on the temperature applied, namely "thermal" and "non-thermal" (i.e., cold atmospheric plasma). Non-thermal or cold atmospheric plasma (CAP) is produced by applying high voltage electric field at low pressures and power. The chemical effects of cold atmospheric plasma in aqueous solution are attributed to high voltage discharge and gas flow, which is transported rapidly on the liquid surface. The argon-cold atmospheric plasma (Ar-CAP) induces efficient reactive oxygen species (ROS) in aqueous solutions without thermal decomposition. Their formation has been confirmed by electron paramagnetic resonance (EPR) spin trapping, which is reviewed here. The similarities and differences between the plasma chemistry, sonochemistry, and radiation chemistry are explained. Further, the evidence for free radical formation in the liquid phase and their role in the biological effects induced by cold atmospheric plasma, ultrasound and ionizing radiation are discussed. © 2016.

Asaji T.,Oshima National College of Maritime Technology | Hirabara N.,Oshima National College of Maritime Technology | Izumihara T.,Oshima National College of Maritime Technology | Hitobo T.,Tateyama Machine Co. | And 5 more authors.
Review of Scientific Instruments | Year: 2014

A new electron cyclotron resonance ion/plasma source has been designed and will be built at Oshima National College of Maritime Technology by early 2014. We have developed an ion source that allows the control of the plasma parameters over a wide range of electron temperatures for material research. A minimum-B magnetic field composed of axial mirror fields and radial cusp fields was designed using mainly Nd-Fe-B permanent magnets. The axial magnetic field can be varied by three solenoid coils. The apparatus has 2.45 GHz magnetron and 2.5-6.0 GHz solid-state microwave sources. © 2013 AIP Publishing LLC.

Asaji T.,National Institute of Technology, Toyama College | Nakamura T.,Japan National Institute of Advanced Industrial Science and Technology | Furuse M.,Japan National Institute of Advanced Industrial Science and Technology | Hitobo T.,Tateyama Machine Co. | And 3 more authors.
Review of Scientific Instruments | Year: 2016

A new electron cyclotron resonance ion source has been constructed at Oshima College with a 2.45 GHz magnetron microwave source and permanent magnets employed as the main components. In addition, a solid-state power amplifier with a frequency range of 2.5-6.0 GHz was installed to study two-frequency plasma heating. Three solenoid coils were set up for adjusting the axial magnetic fields. Argon plasma generation and ion beam production have been conducted during the first year of operation. Ion current densities in the ECR plasma were measured using a biased disk. For 2.45 and 4.65 GHz two-frequency plasma heating, the ion density was approximately 1.5 times higher than that of 2.45 GHz single-frequency heating. © 2015 AIP Publishing LLC.

Minezaki H.,Toyo University | Uchida T.,Toyo University | Tanaka K.,Tateyama Machine Co. | Muramatsu M.,Japan National Institute of Radiological Sciences | And 6 more authors.
AIP Conference Proceedings | Year: 2010

We are developing an ECRIS apparatus which is designed for the production of endohedral fullerenes. Our promising approaches to produce the endohedral fullerenes using the ECRIS are the ion-ion collision reaction of fullerenes and the other atom in their mixture plasma and simple ion implantation of atom into fullerene layer. In this study, we tried to synthesize the endohedral nitrogen-fullerenes by ion implantation. N+ beam was irradiated to a fullerene target with a specific energy and dose. As a result, we could observe the peak of N+C60 from targets after N+ beam irradiation with TOF-SIMS and LDI-TOF-MS. © 2010 American Institute of Physics.

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