Cosmic rays at high latitudes and altitudes covering four solar maxima
Cosmic rays at high latitudes and altitudes covering four solar maxima
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高纬度和高海拔地区的宇宙射线覆盖四个太阳极大期
DOI：
10.1029/ja076i007p01637
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发表时间：
1971
影响因子：
--
通讯作者：
H. V. Neher
中科院分区：
文献类型：
--
作者：
H. V. Neher
自1937年以来，气球飞行已经完成，测量宇宙射线的仪器被带到高纬度的高空。早期的飞行只涉及1937年，1938年，1940年和1946年，但自1951年以来，只有1952年和1953年被错过。使用的仪器是电离室，与帕萨迪纳的标准进行比较。每隔一段时间对电离绝对值的检查表明，32年期间的实验结果可以进行密切比较。除了对已经发表的结果进行总结外，还首次提出了1966年至1969年在图勒进行气球飞行的数据。将20世纪30年代高海拔地区的宇宙射线与20世纪60年代的类似测量结果进行比较，结果表明，在类似太阳活动的早期，宇宙射线的强度在20 gm cm−2时至少高出10%。有人认为，这种长期调制效应可能发生在太阳风遇到星际介质的地方，并且可能由之前几个太阳周期的平均太阳活动决定。
Since 1937 balloon flights have been made in which instruments measuring cosmic rays were carried to high altitudes at high latitudes. The earlier flights involved only the years 1937, 1938, 1940, and 1946, but since 1951 only 1952 and 1953 have been missed. The instruments used were ionization chambers, which were compared with standards kept at Pasadena. Checks on absolute values of ionization at intervals indicate that experimental results over the 32-year period can be closely compared. In addition to giving a summary of already published results, data from balloon flights at Thule for the years 1966 through 1969 are presented for the first time. In comparing cosmic rays at high altitudes during the 1930's with similar measurements in the 1960's, it is shown that the intensity of cosmic rays was at least 10% higher at 20 gm cm−2 during the earlier periods for similar solar activity. It is suggested that this long-term modulation effect probably takes place where the solar wind encounters the interstellar medium and may be determined by the average solar activity of several preceding solar cycles.