Precise dielectric profiling of ice cores: a new device with improved guarding and its theory
Precise dielectric profiling of ice cores: a new device with improved guarding and its theory
复制标题
冰芯的精确介电分布：一种改进防护的新装置及其理论
DOI：
10.3189/s002214300000246x
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发表时间：
1998
影响因子：
3.4
通讯作者：
J. Firestone
中科院分区：
文献类型：
--
作者：
F. Wilhelms;J. Kipfstuhl;H. Miller;K. Heinloth;J. Firestone
摘要介电剖面法(DEP)是一种测量冰芯电导率和介电常数的电容法，已使用多年。我们已经建立了一种改进的DEP仪器，它具有改进的保护电极几何结构，其电容可以根据电势理论确定。这台新仪器可以测量冰芯的电导率和介电常数，误差在几个百分点以内，这一高精度足以使用众所周知的模型来推断其密度。
Abstract Dielectric profiling (DEP), a capacitive method for measuring an ice core’s electrical conductivity and permittivity, has been in use for several years. We have built an improved DEP instrument with a modified guarded-electrode geometry whose capacitance can be determined from potential theory. The new instrument can measure an ice core’s conductivity and permittivity to within a few per cent error, a high enough accuracy to infer its density using well-known models.