Development of a new thoron progeny detector based on SSNTD and the collection by an electric field.
Development of a new thoron progeny detector based on SSNTD and the collection by an electric field.
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DOI：
10.1093/rpd/ncr078
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发表时间：
2011-05
影响因子：
1
通讯作者：
L. Bi;Jochen Tschiersch;O. Meisenberg;M. Wielunski;Junli Li;B. Shang
中科院分区：
文献类型：
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作者：
L. Bi;Jochen Tschiersch;O. Meisenberg;M. Wielunski;Junli Li;B. Shang
在过去的几十年里，（220）Rn（钍射气）子体对人类暴露的重要性已被广泛认识。由于室内钍射气与其子体之间没有稳定的平衡因子，且子体浓度随时间变化，因此有必要研制能长期测量的直接采样探测器。然而，这类探测器的供电一直是个问题。本文介绍了一套适合于长期测量的装置。在固体径迹探测器上形成高压电场，收集（222）Rn（氡）和钍射气子体的带电气溶胶。氡子体的影响可以用适当厚度的铝箔屏蔽来消除。在亥姆霍兹慕尼黑中心的实验室和钍射气室中进行了试验，以确定参数并验证不同条件下的普适性。
The importance of (220)Rn (thoron) progeny for human exposure has been widely recognised in the past decades. Since no stable equilibrium factor was found between indoor thoron and its progeny, and the concentration of thoron progeny varies with time, it is necessary to develop detectors for long-term measurement that directly sample and detect thoron progeny. However, power supply of this kind of detectors has always been a problem. In this study, a set of device that is suitable for long-term measurement is introduced. A high-voltage electric field was formed for the collection of charged aerosols attached by (222)Rn (radon) and thoron progenies on solid-state nuclear track detector. Impact from radon progeny could be eliminated with a shield of Al foil of appropriate thickness. Tests were made both in an experimental house and in a thoron chamber in Helmholtz Zentrum München to determine the parameters and to verify the universality under different conditions.