Arakatsu, Bunsaku

Miyashiro, Syoichi

Sakisaka, Masakatsu

Uemura, Yoshiaki

Yasumi, Shinjiro

Kyoto University Research Information Repository

Title Study on the Ion SourceAuthor(s)Arakatsu, Bunsaku; Uemura, Yoshiaki; Yasumi, Shinjiro;Sakisaka, Masakatsu; Miyashiro, SyoichiCitation京都大学化学研究所報告 (1950), 23: 57-57Issue Date1950-12-30URL http://hdl.handle.net/2433/74194RightType Departmental Bulletin PaperTextversionpublisherKyoto University   In the previous  paper*, we reported the method by which  one could obtain the absolute number of  0-particles emitted from a  sample by the use of  21-c-type counter. In that case, we varied the distance between the top of a center wire and a mica window. Now, in the present experiments, we varied the diameter cf the cathod cylinder. As the result, the same method led us to obtain a good agreeable value of the absolute number of  0-particles emitted from the same sample. Then, this method was found to be applicable to more general use. However, it must be pointed out that when the diameter of the cathod of a counter is larger than that of the window, a value obtained by this method is a little smaller.    * The Reports of the Inst. for Chem. Res. Kyoto Univ., 21 (1950).                49. Study on the Ion Source.        Bunsaku  Arakatsu, Yoshiaki  Uemura,  ShinjirO Yasumi,  Masakatsu  Sakisaka and  Sybichi  Miyashiro.                         (K. Kimura Laboratory)    We have constructed the new type ion source using the discharge in the magnetic field, which is durable and little consumable in electric power and yields compara-tively much ion current. The discharge was prcduced in the cylindrical space of  1  cm. in diameter and about  3cm. in length in the coaxial field of  200-400  gauss. At the center of which the doughnut anode and on both sides the cathodes which were also magnetic pole pieces were settled. The generated ions was protruded through the canal drilled in one  cathode. When the ion source was operated at the discharging voltage of  D.  C.  1000-2000 volts and the vacuum pressure of  8x  10-4-3  x  10-3 mm Hg, the ion current of  20-300  itA. could be obtained. In the case of hydrogen gas, about 60 of the total ions were protons, and this ratio increased after long hours' operation.    Furthermore, we have tried the theoretical treatment of the icn beam passing through the canal and the conditions to obtain maximum  ion current were derived. Good agreement was found between the calculations and the experimental results. Thus the most effective size of the canal of conductance 440  cc/sec. in the case of hydrogen was 0.1 cm. in radius and  0.52  cm. in length for protons having the energy of 1000 volts.  (  57  )

Study on the Ion Source

http://repository.kulib.kyoto-u.ac.jp/dspace/bitstream/2433/74194/1/chc023_057.pdf

Study on the Ion Source

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