著者

山口 作太郎

出版者

社団法人 プラズマ・核融合学会

雑誌

プラズマ・核融合学会誌 (ISSN:09187928)

巻号頁・発行日

vol.78, no.1, pp.19-35, 2002 (Released:2005-12-08)

参考文献数

39

被引用文献数

2

---

Thermoelectric system has various merits for use in energy conversion because the temperature difference is only required to generate electric power and there are not movable parts in the system. However, thermoelectric system is not so popular in civil use because its energy conversion efficiency is not high in the present time. But if we consider the exergy flow even in a conventional turbine generator, the turbine generator system can not use energy completely, and a symbiotic and/or hybrid system can be applied, which is introduced in the present study. On the other hand, in fusion reactor there are many parts having large temperature difference because plasma temperature is high and superconducting magnets are used. One of the applications for superconducting system is mentioned and is called Peltier current lead. This can reduce heat leak to low-temperature system, and improve the efficiency of the whole system. Recently, material study has progressed, and various kinds of materials are proposed and studied. The magnetic field effect is introduced as investigated by the author's research group. Magnetic field effect was divided into three levels of the categories. One is in the macroscopic level, and this is characterized by the generalized Ohm's equation. The second level is characterized by Boltzmann equation, and in this level we can discuss the macroscopic transport parameters. The third level is the microscopic level and we discuss the band structure to solve the carriers themselves, for example Schrödinger equation. In this paper, our recent activities are mentioned in these fields.

著者

重光 司

出版者

社団法人 プラズマ・核融合学会

雑誌

プラズマ・核融合学会誌 (ISSN:09187928)

巻号頁・発行日

vol.75, no.6, pp.659-665, 1999-06-25 (Released:2001-04-26)

参考文献数

19

被引用文献数

7 16

---

This paper briefly reviews the effects of electric fields, air ions, and corona discharge on plants. From the middle of the eighteenth century, electric fields and air ions have been applied to plants both in the field and under laboratory conditions. Although many studies have reported beneficial effects, the results have been inconsistent, and the electrical conditions leading to definite benefits cannot so far be predicted. High electric fields have been reported to damage plants by flowing the induced currents caused by corona discharge from the tips. Since the investigations have been continued, the results have been controversial and contradictory. There remains no firm theory governing electrophysiology in plants.

著者

一政 祐輔

出版者

社団法人 プラズマ・核融合学会

雑誌

核融合研究 (ISSN:04512375)

巻号頁・発行日

vol.64, no.6, pp.461-481, 1990-12-20 (Released:2010-10-22)

参考文献数

88

---

Recent topics in the following studies of biological effects of tritium are reviewed: 1) tritium level in the environment, 2) mechanism of biological conversion of environmental molecular tritium, 3) tritium content of Japanese bodies and foods, 4) uptake and metabolism of molecular tritium in mammals, 5) absorption rate of tritiated water in mammals, 6) metabolism of organically bound tritium in animals, 7) enhanced excretion of tritium from body, 8) RBE of tritium.

著者

河崎 善一郎

出版者

社団法人 プラズマ・核融合学会

雑誌

プラズマ・核融合学会誌 (ISSN:09187928)

巻号頁・発行日

vol.80, no.7, pp.589-596, 2004 (Released:2005-03-16)

参考文献数

24

被引用文献数

1 1

---

Investigation of lightning discharges has about 250 years history. During these 250 years we have accumulated the knowledge, and the understanding of lightning physics has been done qualitatively. According to the author's understanding our interpretation and understanding about lightning physics is not sufficient. Moreover still we have newly discovered phenomena related with lightning discharge, like discharges from thundercloud top to the ionosphere named RedSprite. The investigation on lightning physics can be concluded as one of the attractive subjects, though it has long history.

著者

塚本 俊介 前田 貴昭 池田 元吉 秋山 秀典

出版者

社団法人 プラズマ・核融合学会

雑誌

プラズマ・核融合学会誌 (ISSN:09187928)

巻号頁・発行日

vol.79, no.1, pp.39-42, 2003 (Released:2005-09-28)

参考文献数

8

被引用文献数

5 7

---

Pulsed high voltage was applied to logs used for mushroom culturing to mushroom growth. An experiment was carried out in an attempt to increase shiitake mushroom yield. Results showed that the weight of shiitake mushroom yield was double that of a normal group cropped in a month. Another experiment was performed to estimate the effect of electrical stimulation on the growth of hyphae. Results of that experiment showed a slight influence on the growth of hyphae, and showed some possibilities this method can improve mushroom culturing techniques.

著者

阪上 正信

出版者

社団法人 プラズマ・核融合学会

雑誌

核融合研究 (ISSN:04512375)

巻号頁・発行日

vol.54, no.5, pp.498-511, 1985-11-20 (Released:2011-03-04)

参考文献数

10

被引用文献数

1 1

---

Various studies about the behavior of tritium in the environment are reviewed with comments on several origins of their occurances. For atmospheric tritium, different chemical species and their seasonal variation have been studied. The average tritium concentration in river waters was found to be 1.5-2 times higher than that of precipitations at various sites of Japan.The vertical distribution of tritium in ground water has raised an interest for the samples collected from different wells in depth. The effect of the accidental release of tritium and the tritium level around nuclear facilities are also mentioned.

著者

深井 佑造

出版者

社団法人 プラズマ・核融合学会

雑誌

核融合研究 (ISSN:04512375)

巻号頁・発行日

vol.63, no.4, pp.248-270, 1990-04-20 (Released:2011-03-04)

参考文献数

28

---

It is presented to estimate yields of neutron and radioactive nucleus (7Be, 12B, 10C, 11C, 14C, 13N) per one p11B fusion reaction by the following 15 reactions : 11B (p, n) 11C, 11B (α, n) 14N, 11B (α, p) 14C, (α, n) of the structure material (SUS316) bombarded by α-particles, (γ, n) of the same and 11B (γ, n) 10B by 16MeV γ -ray of 11B (p, γ) 12C, 10B (p, n) 10C, 10B (α, n) 13N, 10B (p, γ) nc, 10B (p, α) 7Be, 11B (d, n) 12C, 11B (d, 2n) 11C, 11B (d, p) 12B, 10B (d, n) 11 10B (d, n) C and D (d, n) 3He, in the p11B fusion plasma with impurities of 10B and D. Result shows that the neutron yields by the other 7 reactions than11B (p, n) 11C, 11B (α, n) 14N, SUS316 (γ, n) and 11B (d, n) 12C can be neglected (< 10-7). Neutron yield and averaged energy by the above 4 main reactions are 2.27×10-3 and 2.49 MeV, and, 9.62×10-5 and 3.93 MeV from the plasma of Ti=300keV and Ti/Te=1, and Ti/Te=200, respectively.

著者

時松 宏治

出版者

社団法人 プラズマ・核融合学会

雑誌

プラズマ・核融合学会誌 (ISSN:09187928)

巻号頁・発行日

vol.78, no.11, pp.1186-1191, 2002 (Released:2005-12-08)

参考文献数

15

---

This paper outlines the use of nuclear fusion as a global warming mitigation technology. Life cycle CO2 emission from a nuclear fusion plant is quite low; it is comparable to that of nuclear fission. Nuclear fusion has the potential to contribute future energy systems and environment. The technological feasibility of nuclear fusion should be demonstrated in order to begin clarifying the potential contribution of nuclear fusion as well as to educate those outside of the fusion community about its potential.

著者

小野 靖 西尾 敏 高瀬 雄一 長山 好夫 前川 孝

出版者

社団法人 プラズマ・核融合学会

雑誌

プラズマ・核融合学会誌 (ISSN:09187928)

巻号頁・発行日

vol.80, no.11, pp.919-920, 2004 (Released:2005-07-14)

著者

柴橋 博資

出版者

社団法人 プラズマ・核融合学会

雑誌

プラズマ・核融合学会誌 (ISSN:09187928)

巻号頁・発行日

vol.78, no.6, pp.497-507, 2002 (Released:2005-12-08)

参考文献数

30

被引用文献数

6 5

---

There has been a long-standing discrepancy between the number of neutrinos expected from the sun and the number we actually detect. One possible way to account for this is that our theoretical solar model is inaccurate. However, recent progress in helioseismology has shown that the real sun is very close to the latest solar models. On the other hand, very recent experiments of neutrino detection provided us evidence for neutrino oscillation. I discuss what we should do and what we can do in this situation for the neutrino physics from the astrophysical side.

著者

嶋田 隆一

出版者

社団法人 プラズマ・核融合学会

雑誌

プラズマ・核融合学会誌 (ISSN:09187928)

巻号頁・発行日

vol.80, no.7, pp.572-577, 2004 (Released:2005-03-16)

参考文献数

9

被引用文献数

1 2

---

Kinetic energy has been the energy well known since ancient times. The generator with a flywheel is an electric power amplifier that stores electric power and is made to generate large electric power at the short time, and used to be in a nuclear fusion institution. In recent years, the flywheel has been recognized an electric power tool for power stabilization. An example of application in the industry and in an electric power community is introduced. In addition, a characteristic application is developed despite the fact the energy efficiency of compressed air energy storage is generally poor.

著者

渡辺 二太

出版者

社団法人 プラズマ・核融合学会

雑誌

核融合研究 (ISSN:04512375)

巻号頁・発行日

vol.35, no.3, pp.235-242, 1976 (Released:2011-08-16)

参考文献数

3

被引用文献数

1

---

この報告は, プラズマ研究所の計算機「HITAC-8500」のための1つのプログラムの報告である。このプログラムは空心円筒コイル群によって作られる磁場を計算し, 1) 磁場のr成分 (=Br), z成分 (=Bz), 磁場の強さ (=√B2r+B2z), ベクトルポテンシアルのφ-成分と軸迄の距離の積 (=rAφ) をラインプリンターに出力し, 2) 磁力線を, コイルの断面図と共に, プロッターで描かせ, 更に3) 磁場の強さが等しい点を結んだ線 (等磁気圧線) もプロッターで描かせることが出来るように製作されている。

著者

渡辺 二太

出版者

社団法人 プラズマ・核融合学会

雑誌

核融合研究 (ISSN:04512375)

巻号頁・発行日

vol.63, no.6, pp.482-507, 1990-06-20 (Released:2011-03-04)

参考文献数

9

被引用文献数

2 3

---

A highly accurate numerical procedure and its computer program is presented for the calculation of magnetic field produced by body current coils of various shapes.

著者

等々力 二郎

出版者

社団法人 プラズマ・核融合学会

雑誌

核融合研究 (ISSN:04512375)

巻号頁・発行日

vol.57, no.5, pp.318-324, 1987-05-20 (Released:2011-03-04)

参考文献数

3

被引用文献数

6 5

---

Method to calculate the magnetic field produced by finite size helical coils with an rectangular cross section is derived. The uniform current density across the cross section is assumed. The double integral across the cross section is carried out analytically, and the integral along the axis of the helical coils is carried out numerically. An example of the helical coil wound around a toroid is shown, under the assumption that the edge of the coil is tangential to the toroid.

著者

仁田 旦三

出版者

社団法人 プラズマ・核融合学会

雑誌

プラズマ・核融合学会誌 (ISSN:09187928)

巻号頁・発行日

vol.80, no.7, pp.578-581, 2004 (Released:2005-03-16)

参考文献数

2

---

The principle, the structure, the features, the history, the state of art development, and the application of Superconducting Magnetic Energy Storage (SMES) are described.

著者

國友 新太

出版者

社団法人 プラズマ・核融合学会

雑誌

プラズマ・核融合学会誌 (ISSN:09187928)

巻号頁・発行日

vol.79, no.1, pp.31-34, 2003 (Released:2005-09-28)

参考文献数

11

被引用文献数

3 4

---

Cryptosporidium contaminates most surface waters around the world. It is difficult to remove through conventional treatment processes, and is extremely resistant to the method of chemical disinfection typically used to inactivate these microorganisms. We have developed a new technology for inactivating Cryptosporidium oocysts by using a pulsed arc discharge in water, which creates shock waves, UV emissions, and radicals. The pulsed arc is generated between two cylindrical stainless steel rod electrodes, 6 mm in diameter, and 2 mm apart. We applied this method to the inactivation of oocysts in backwash water from a sand-filter unit of a drinking water plant. The results indicate that the major factor influencing inactivation is UV emissions, and that more than 99% of the oocysts in the high turbidity backwash water (80 NTU) are inactivated with an energy of 0.24 kWh/m3.

著者

佐藤 哲也

出版者

社団法人 プラズマ・核融合学会

雑誌

プラズマ・核融合学会誌 (ISSN:09187928)

巻号頁・発行日

vol.75, no.1, pp.7-16, 1999 (Released:2000-12-26)

参考文献数

6

被引用文献数

1 1

---

After its more than 80 years long history, the dynamo problem has finally approached to the goal of one’s ambition to unveil its grand mystery of creation and reversal of the geodynamic field in a self-consistent fasion. The success in unveiling this long mystery of the dynamo problem has been brought by elaborate large-scale computer simulations. In this review, a brief history of the dynamo problem, both theoretical and observational, is first described. Then the recent exciting demonstrations of the generation and reversal of the self-excited dipole-like magnetic structure done by the UCLA-LANL group and the NIFS group are described.

著者

河村 和孝

出版者

社団法人 プラズマ・核融合学会

雑誌

核融合研究 (ISSN:04512375)

巻号頁・発行日

vol.42, no.4, pp.456-471, 1979 (Released:2011-03-04)

参考文献数

14

著者

飛田 健次 日渡 良爾

出版者

社団法人 プラズマ・核融合学会

雑誌

プラズマ・核融合学会誌 (ISSN:09187928)

巻号頁・発行日

vol.78, no.11, pp.1179-1185, 2002 (Released:2005-12-08)

参考文献数

19

被引用文献数

3 2

---

Waste management at fusion power plants is reviewed. Recent study indicates that most of the waste from a fusion reactor can be cleared from regulatory control over a 50-year cooling after decommissioning. In addition, the remaining metal radioactive waste is anticipated to be recyclable within 100-year cooling. These results indicate the prospect of a low emission system of fusion energy materials.

著者

高畑 一也

出版者

社団法人 プラズマ・核融合学会

雑誌

プラズマ・核融合学会誌 (ISSN:09187928)

巻号頁・発行日

vol.81, no.4, pp.273-279, 2005 (Released:2005-07-29)

参考文献数

29

被引用文献数

12 12

---

Magnetic fusion reactors need a superconducting coil system with the huge magnetic energy of approximately 100 GJ. A number of superconducting fusion experimental devices have been constructed since 1970. Accumulated technologies and experiences for the past 35 years now allow us to design the actual reactors. However, there still remain some engineering problems in order to design the commercial reactors that will need a low construction cost, a high field and high reliability. It is necessary to develop high-strength supporting materials, next-generation superconductors and high-current-capacity conductors.