Performance improvement of extremely compact discharge-type D-^3He fusion device by use of magnetron-discharge-based ion source
| Project/Area Number |
16360457
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nuclear fusion studies
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
YOSHIKAWA Kiyoshi Kyoto University, Institute of Advanced Energy, Professor, エネルギー理工学研究所, 教授 (00027145)
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| Co-Investigator(Kenkyū-buntansha) |
MASUDA Kai Kyoto University, Institute of Advanced Energy, Associate Professor, エネルギー理工学研究所, 助教授 (80303907)
TOKU Hisayuki Kyoto University, Institute of Advanced Energy, Assistant Professor, エネルギー理工学研究所, 助手 (70093276)
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| Project Period (FY) |
2004 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥14,900,000 (Direct Cost: ¥14,900,000)
Fiscal Year 2005: ¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 2004: ¥10,800,000 (Direct Cost: ¥10,800,000)
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| Keywords | nuclear fusion / proton source / D-^3He fusion reaction / plasma / inertial electrostatic confinement / ion source / magnetron discharge / spatial distribution measurement |
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| Research Abstract |
Objective of this study is to develop a compact source of highly energetic (14.7MeV) protons based on D-^3He nuclear fusion reactions in an inertial electrostatic confinement (IEC) device.
Though many researches on the IEC has been conducted for 40 years, limited experimental results have been shown on D-^3He reactions ; University of Wisconsin, Madison has succeeded in observing highly energetic protons from D-^3He fusion reactions in an IEC device for the first time, while the total reaction rate as well as their spatial profile are left unclear. Understanding the mechanism is no doubt essential for innovative concepts based on IEC coming up to show a drastically improved performance of the D-^3He IEC fusion based proton source applicable to versatile uses.
In this study we have revealed experimentally the spatial distribution of D-^3He fusion reactions in an IEC device. Also, we have proposed a new operational scheme utilizing a compact built-in ion source aiming at a drastic enhancem
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ent of the proton yield while preserving the advantageous features of IEC device such as compactness, simplicity and low cost. Outstanding outcomes of this study are summarized in the followings :
1.Dependences of fusion reaction rate on operational parameters such as applied bias voltage and D_2-^3He fuel gas compositions have been made clear experimentally, and theoretically as well.
2.A method to determine the spatial distribution of fusion reactions has been developed.
3.The spatial distribution and consequently the total D-^3He fusion reaction rate have been measured successfully.
4.As the results we found that (1) the fractions of proton production, namely the volumetric production and embedded fusion on electrode surface, are 60 and 40% respectively, and that (2) the former is strongly localized at the device center, both of which are very encouraging compared with the implication by previous researches.
5.The developed magnetron-discharge-based built-in ion source adopted in the IECF device has resulted in a greatly reduced operational gas pressure, and consequently a factor of 10 increase in fusion reaction rate per given input power. Less
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Report
(3 results)
Research Products
(7 results)
