ANOMALIES IN IONIZATION COEFFICIENTS AND IN UNIFORM FIELD BREAKDOWN IN ARGON FOR LOW VALUES OF E/p
ANOMALIES IN IONIZATION COEFFICIENTS AND IN UNIFORM FIELD BREAKDOWN IN ARGON FOR LOW VALUES OF E/p
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低E/p值时氩气中电离系数和均匀场击穿的异常
DOI：
10.1103/physrev.123.1079
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发表时间：
1961
期刊：
影响因子：
--
通讯作者：
L. Fisher
中科院分区：
文献类型：
--
作者：
D. E. Golden;L. Fisher
在均匀的场中，已经在均匀的场中测量了氩气电离电流，以低电场强度与压力E/PSTA5与12 V（CM MM HG）/SUP -1/！无法分析恒定的E/P和常数P，以产生Townsend合作A/P和Gamma的值。 A/p和伽马，但是这种电流产生的系数取决于d。这些高度激发的原子在与地面氩原子的碰撞中产生了分子离子和电子对于上述E/P范围对应的PD值的P和D的潜在测量都会改变PD的差异，显示出与Paschen定律的不同。在E/p = 5（d = 4 cm）时，Kruithof和more的早期测量值高达15个。故障仅为1.05，伽玛的值约为20。在E/P的较大值下，A/P的当前值与D相关，并接近其所获得的火花势。由于阴极表面（auth）的状况
Prebreakdown ionization currents in argon have been measured in uniform fields for low values of the ratio of field strength to pressure E/pSTA5 to 12 v (cm mm Hg)/sup -1/!. Currents obtained with varying electrode separation d at constant E/p and constant p could not be analyzed to yield values of the Townsend coefficients a/p and gamma . Currents obtained with varying p at constant E/p and constant d could be analyzed to yield values of a/p and gamma , but such currents yielded coefficients which depend on d. The dependence of the values of a/p on d is attributed to the production of highly excited atoms by resonance radiation at some distance from the positions where the electrons lose their energy; these highly excited atoms then produce molecular ions and electrons in collisions with ground-state argon atoms. The secondary mechanism and the dependence of gamma on d are associated with resonance radiation. Sparking potential measurements in argon made by varying both p and d for values of pd corresponding to breakdown for the above range of E/p show deviations from Paschen's law. Disregarding the above anomalies, the values of a/p are smaller than the earlier measurements of Kruithof andmore » Penning by as much as a factor of 15 at E/p = 5 (d = 4 cm). At this value of E/p (and of d), the value of exp(ad) at breakdown is only 1.05, and the value of gamma is about 20. At larger values of E/p, the present values of a/p become independent of d and approach theirs. The sparking potentials obtained are significantly larger than those obtained by Kachickas and Fisher. This is shown to be due to the condition of the cathode surface. (auth)« less