1 NPO法人放射線教育フォーラムNPO Radiation Education Forum
2 名古屋大学医学系研究科Nagoya University, Graduate School of Medicine
GM管サーベイメータの高電圧電源をコロナ放電実験に利用するために，まず印加電圧と放電電流の関係を，先端の曲率の異なる放電電極に対して実験的及び理論的に検討した。結果として，箔検電器と摩擦静電気を補助的に利用した新しい現象“誘起コロナ放電”を見出した。放射線実験に続いてコロナ放電実験のような理科実験を行えば機器の有効利用になるとともに，電離は放射線，放電，摩擦などによって起きることが理解でき，物理現象に対する多面的な観点を提供することができる。
For the purpose of utilizing the high voltage of a Geiger-Mueller (GM) tube survey meter for corona electric discharge experiment, the relation between the applied high voltage and corona discharge current for the different curvatures of the tips of the electrodes was examined both experimentally and theoretically. As a result, a new electric discharge phenomenon “triggered corona discharge” with the help of the usage of a leaf electroscope and tribo-electricity was found. Performance of science experiment such as corona electric discharge after radiation education experiments using the same GM tube survey meter is an effective use of the equipment and also helpful to understand “ionization phenomenon” from different perspectives of nuclear radiation, electric discharge and tribo-electricity.
Key words: GM tube; survey meter; high voltage; corona discharge; electrode curvature; leaf electroscope; tribo-electricity
© Japan Radioisotope Association 2022. This is an open access article distributed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/)© Japan Radioisotope Association 2022. This is an open access article distributed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/)
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