Author
Sunao Kawasaki
Bio: Sunao Kawasaki is an academic researcher from Kanazawa University. The author has contributed to research in topics: Beam (structure) & Adiabatic process. The author has an hindex of 1, co-authored 7 publications receiving 5 citations.
Papers
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TL;DR: The flexibility and the reliability of the design, including the use of the system with the multiple purposes in the wide range of science other than the nuclear fusion, are also considered.
Abstract: A brief description is given on the design of a high energy accelerator system for an intense heavy ion beam as an igniter of the inertial fusion. The compromise between the requirements for the final beam and the cost is the problem of principal concern. The flexibility and the reliability of the design, including the use of the system with the multiple purposes in the wide range of science other than the nuclear fusion, are also considered.
3 citations
TL;DR: In this paper, the pillbox model is applied to the closed cylindrical structure of the vacuum chamber, and the effects of the self-fields of the electron ring and beam loading are considered.
Abstract: During the adiabatic compression of an electron ring, negative mass instabilities have been observed. To interpret these experimental results, the pillbox model is applied to the closed cylindrical structure of the vacuum chamber, and the effects of the self-fields of the electron ring and beam loading are considered. Using such a model we can explain the experimental results.
1 citations
TL;DR: In this paper, the high frequency operation of linacs is discussed and several trial designs for fusion material irradiction test facility in Japan are given, where the size of linac namely the construction cost may be reduced by using 1 MW CW klystrons with the frequency of about 1 GHz.
Abstract: The high frequency operation of linacs is discussed and several trial designs for fusion material irradiction test facility in Japan are given. The size of linac namely the construction cost may be reduced by using 1 MW CW klystrons with the frequency of about 1 GHz. Preliminary results of the fabrication technique for the linac drift tube by copper coating are shown.
1 citations
TL;DR: Balance between remote maintenance and adoption of low activation materials is the key issue of this facility to raise the operational performance.
TL;DR: In this article, the preparation of high current steady state ion source, fabrication of linac tanks by coating method, and development of high power high frequency power tube is described, and the measurements of the change of Q-value with coating thickness of 10 ∼ 30 μm are performed.
Cited by
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TL;DR: In this article, a novel accelerator scheme based on a repetitive induction modulator has been proposed as a cost-effective particle-beam driver scheme, and an irradiation method to mitigate the instability in imploding targets was proposed using oscillating heavy-ion beams.
19 citations
TL;DR: A metal ring was installed to each of the main capacitor modules of the coaxial Marx-type highvoltage generator to increase the stray capacitance between the main capacitors and the cylinder of the outer conductor as mentioned in this paper.
Abstract: A metal ring was installed to each of the main capacitor modules of the coaxial Marx‐type high‐voltage generator to increase the stray capacitance between the main capacitors and the cylinder of the outer conductor. Improvements in build‐up time of the output voltage were achieved and good agreements were obtained between the experimental and the simulated results.
11 citations
01 Jan 1983
TL;DR: In this article, the authors presented a more reliable measure for the choice of the various driven accelerator components and their combination, including particle species, energy state, final energy and the sizes of the driver and the reactor.
Abstract: Energy accounting study is one of the major subject of future commercial reactor. Although there is the ambiguity of reactor concept, for heavy ion ICF system, the driver accelerator is based on well developed accelerator technology, so that we can obtain rather good scope on this subject than other type of reactors. The study given in our previous paper /1/ is refined to give a more reliable measure for the choice of the various driven accelerator components and their combination, including particle species, energy state, final energy and the sizes of the driver and the reactor. The design policy adopted in accord with our environmental situation leads to a driver assembly having multiple induction Linacs. The energy cost of the driver is comparable with or higher than that of the reactor-generator system and shows that in the energy term HIF program has a narrow possibility as the way for realizing a practical power station.
1 citations
01 Jan 1983
TL;DR: In this article, the main performances of different Thomson-CSF electron tubes for use in the controlled fusion field are given, as well as the experimental results to which they have already contributed.
Abstract: Controlled thermonuclear fusion appears to be a field in which the use of electron tubes, in particular high-power tubes, will grow rapidly in the near future The applications concerned are essentially RF heating of plasmas; the RF current drive; high-current light-ion accelerators and RF sources for spallation machines and fissiles material generators The diversity of these applications and the range of the frequencies concerned have led Thomson-CSF to develop specific fusion-oriented models of our widely used high power klystrons and grid tubes, to best meet the needs expressed by specialists in the controlled thermonuclear fusion field The main performances of the different Thomson-CSF electron tubes for use in the controlled fusion field are given, as well as the experimental results to which they have already contributed The orientations of Thomson-CSF's development effors in this field are also indicated
TL;DR: In this article, the preparation of high current steady state ion source, fabrication of linac tanks by coating method, and development of high power high frequency power tube is described, and the measurements of the change of Q-value with coating thickness of 10 ∼ 30 μm are performed.