issue 5-6

20140506-59
Estimation of Self-Ignited Plasma Density Using Plasma-Based Ion Implantation
Nobuyuki Fujimura, Kazuhiro Shimono, Hiromitsu Noguchi, Hiroshi Toyota, Yoshito Shirai, Takeshi Tanaka

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Plasma density is estimated from the target voltage and current characteristics of the pulse modulator circuit in plasma-based ion implantation. The voltage recovery time constant directly reflects the ion sheath characteristics, ...  read more

20140506-58
Spore-Forming Bacteria Sterilization Using Plasma-Based Ion Implantation
Koji Kakugawa, Masatoshi Kubo, Hiromitsu Noguchi, Kazuhiro Shimono, Nobuyuki Fujimura, Yoshinobu Tsuchiya, Takeshi Tanaka

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A main purpose of sterilization is to kill the harmful microorganisms. In food industry, the representatives of microorganisms which are difficult to sterilize are spore-forming bacteria. Because these bacteria are extremely ...  read more

20140506-57
Comparison of Plasma Spectral Characteristics Using a Plasma- Based Ion Implantation
Hiromitsu Noguchi, Nobuyuki Fujimura, Kazuhiro Shimono, Hiroshi Toyota, Yoshito Shirai and Takeshi Tanaka

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Plasma-based ion implantation is a recently developed technique used to modify the surface of materials by immersion in plasma coupled with the application of a negative bias voltage.

In this study, we compare the properties ...  read more

20140506-56
Preliminary Estimation of Incident Ion Energy by Using Simulation Software (PEGASUS)
Hideaki Kozai, Nobuyuki Fujimura, Mitsuhiro Noguchi, Hiroshi Toyota, Yoshito Shirai, Takeshi Tanaka, Katia Vutova

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Plasma base ion implantation (PBII) with self-ignited plasma generated by only pulsed voltages to the test specimen has been applied to the sterilization process. We found that the PBII process reduced the numbers of active ...  read more

20140506-55
Pulse Width Dependence of the Self-Ignited Plasma Using a Plasma-Based Ion Implantation
Kazuhiro Shimono, Nobuyuki Fujimura, Hiromitsu Noguchi, Hiroshi Toyota, Yoshito Shirai, Takeshi Tanaka, Katia Vutova

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Plasma based ion implantation (PBII) with high negative pulsed voltage applied to the test specimen has been applied to the sterilization process as a technique suitable for three-dimensional work pieces. We found that the ...  read more

20140506-54
Laser Scalpel
Viktor M. Spivak, Vladislav Y. Khaskin, Mikhay S. Tirshu

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It is shown that the laser scalpel can easily and without any mechanical force cut both soft and hard (bone) living tissue. This is a low-impact operation with cutting width – 0.1 … 0.5 mm. Evaporation mechanism ...  read more

20140506-53
The Microstructure of the Surface Layers by Laser and Laser- Miсroplasma Alloying
Volodymyr D. Sheliagin, Victor M. Spivak, Artemii V. Bernatskyi, Mihai S.Tirsu

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Considered are the technologies of laser and laser-microplasma alloying of surface layers of 38KhN3MFA structural steel specimens with introduction of powder filler materials based on tungsten and chromium carbide, promoting ...  read more

20140506-52
Electron Beam Sintering of Ceramics
Aleksandr S. Klimov, Aleksey А. Zenin, Efim М. Oks, Oleg L. Khasanov, Edgar S. Dvilis, Aleksei О. Khasanov

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Results on application of electron beam in fore-vacuum for ceramic sintering are presented. Three types of ceramic were investigated: aluminum oxide Al2O3, zirconium oxide YSZ and silicon carbide SiC. ...  read more

20140506-51
Electron Beam Micromachining of Plastics
Libor Dupák

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This paper describes some possibilities of using electron beam welder to machine plastics. Several different types were tested including PC, PMMA, PVC, PTFE, PE and PP. For initial study how certain material reacts to the ...  read more

20140506-50
Non-Vacuum Electron Beam Cutting – a New High Performance Process
Thomas Hassel, Nils Murray, Alexander Beniyash, Nikolay Rempe, Sergey Kornilov

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The electron beam is a tool with high energy conversion efficiency which is by and large independent of the type of metal. Its high power density qualifies the non-vacuum electron beam as an outstanding energy source for the ...  read more