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Volume 3, Issue 5
Displaying 1-10 of 10 articles from this issue
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Hideo AKIMUNE, Yoshihiro FUJITA, Tokuo SUITA1966 Volume 3 Issue 5 Pages 171-179
Published: 1966
Released on J-STAGE: February 28, 2008
JOURNAL FREE ACCESSA method of using rf electric field in a device for high-energy injection is described, and the behavior of the molecular ions injected into a system combining rf and DC magnetic fields is investigated by calculation and observation.
In this method, some of the injected molecular ions are decelerated by the rf field, and trapped in a small region between the mirror fields, where they are dissociated by collision with the background gas or with the plasma particles, and are thus trapped in the form of atomic ion. The relation between the rf frequency ω and the Larmor frequencies ΩH2+, ΩH1+ is given by ω=N/2•ΩH2+=N/4•ΩH1+, where N is the number of rf electrodes. The number N is chosen so that N/2 is an integer and N/4 a non-integer.
Calculation shows that the ions injected in a certain favorable phase are stably decelerated despite their initially possessing a precessional motion. This is proven by observation of actual electron behavior.View full abstractDownload PDF (1240K) -
Hisashi YAMAMOTO1966 Volume 3 Issue 5 Pages 180-183
Published: 1966
Released on J-STAGE: February 28, 2008
JOURNAL FREE ACCESS(9) YAMAMOTO, H.: To be published in this Journal.View full abstractDownload PDF (223K) -
Shoichiro NAKAMURA1966 Volume 3 Issue 5 Pages 184-188
Published: 1966
Released on J-STAGE: February 28, 2008
JOURNAL FREE ACCESSThis paper describes a method based on the consistent thermal neutron flux concept for burnup analysis of power reactors in equilibrium operation cycle. Radial flux distributions are discussed, as well as the variation of isotopic densities in the fuel, and considerations are given on control rod distribution for maintaining a consistent thermal flux distribution. The present method can be applied to most power reactors like BWR and PWR in which a multiple-batch refueling scheme is adopted.View full abstractDownload PDF (297K) -
Lennart STENFLO1966 Volume 3 Issue 5 Pages 189-193
Published: 1966
Released on J-STAGE: February 28, 2008
JOURNAL FREE ACCESSIf a slightly ionized gas is subject to a constant electric field the (time- and space independent) distribution function for the electrons may be double-humped if the cross section for electron-molecule interactions is changing sufficiently rapidly with velocity. Accordingly“inverse Landaudamping”can make the distribution function unstable with respect to longitudinal waves if the collisional damping is not too large. The results in the present paper indicate that the plasma can be unstable and parameters involved are estimated in order to get the conditions for instability.View full abstractDownload PDF (340K) -
Masahiro KATSURA, Tadao SANO1966 Volume 3 Issue 5 Pages 194-199
Published: 1966
Released on J-STAGE: February 28, 2008
JOURNAL FREE ACCESSIn the previous work(1) dealing with the equilibrium phase relations in the ternary system U-C-N, a qualitative phase diagram was constructed from thermodynamical calculations and experiments. In the thermodynamical calculations, it was assumed that the free energy of formation of the solid solution between UC and UN, i.e., UC1-x ?? N, is the sum of (1-x)ΔG0(UC), xΔG0(UN) and a term for the entropy of mixing RT{xlogx+(1-x)log(1-x)}, neglecting the heat of mixing.
The purpose of the present work is to consider the same U-C-N system statistico-thermodynami-cally, and to evaluate the heat of mixing from the results of several experiments. A value of about -1.3kcal/mole was obtained as the heat of mixing corresponding to {2φ(C_N)-φ(C_C)-φ(N_N)}N, where φ(C_N), φ(C_C) and φ(N_N) are the bond energies of C_N, C_C and N_N respectively.View full abstractDownload PDF (405K) -
Sei-ichi TAKAYANAGI, Noboru OI, Tetsuji KOBAYASHI, Tohru SUGITA1966 Volume 3 Issue 5 Pages 200-207
Published: 1966
Released on J-STAGE: February 28, 2008
JOURNAL FREE ACCESSThe γ-ray spectra of fission products from thermal neutron irradiation of natural U were observed with an encapsulated Li-drift-Ge, γ-ray spectrometer. The spectra were recorded at various periods after irradiation-1, 2, 5, 12, 30, 250 days and 3 years. The γ-ray spectra of eight individual fission products including 239Np were also studied. Due to the high resolution obtained with the detector, many nuclides were identified which would have been undetectable without resorting to chemical separation.View full abstractDownload PDF (450K) -
Shigeru YASUKAWA, Ruichi SHINDO1966 Volume 3 Issue 5 Pages 208-215
Published: 1966
Released on J-STAGE: February 28, 2008
JOURNAL FREE ACCESSDownload PDF (127K) -
Kiyoshi TAKEUCHI, Iwao KATAOKA1966 Volume 3 Issue 5 Pages 209-212
Published: 1966
Released on J-STAGE: February 28, 2008
JOURNAL FREE ACCESSDownload PDF (269K) -
Yoshihiko KANEKO1966 Volume 3 Issue 5 Pages 212-215
Published: 1966
Released on J-STAGE: February 28, 2008
JOURNAL FREE ACCESSDownload PDF (224K) -
1966 Volume 3 Issue 5 Pages 215
Published: 1966
Released on J-STAGE: April 21, 2008
JOURNAL FREE ACCESSDownload PDF (27K)
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