Design of Ionization Chamber Used to Measure Activity of Tritium Enclosed in ICF Targets

LIU Xue; YE Cheng-gang; JIA Peng; LI Jia#

doi:10.11804/NuclPhysRev.27.03.304

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Article Navigation > Nuclear Physics Review > 2010 > 27(3): 304-308

LIU Xue, YE Cheng-gang, JIA Peng, LI Jia#. Design of Ionization Chamber Used to Measure Activity of Tritium Enclosed in ICF Targets[J]. Nuclear Physics Review, 2010, 27(3): 304-308. doi: 10.11804/NuclPhysRev.27.03.304

Citation:

LIU Xue, YE Cheng-gang, JIA Peng, LI Jia#. Design of Ionization Chamber Used to Measure Activity of Tritium Enclosed in ICF Targets[J]. Nuclear Physics Review, 2010, 27(3): 304-308. doi: 10.11804/NuclPhysRev.27.03.304

Design of Ionization Chamber Used to Measure Activity of Tritium Enclosed in ICF Targets

doi: 10.11804/NuclPhysRev.27.03.304

China Academy of Engineering Physics, Mianyang 621900, Sichuan, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2010-09-20

Abstract

A cylindrical ionization chamber was designed for the measurement of the tritium at the level enclosed in inertial confinement fusion(ICF) targets. In stead of the conventional rubber seals, the metallic seals was adopted to reduce the chamber contamination caused by the strong tritium absorption of rubber and plastics. A 2 μmthick Au layer was plated on the inner wall of the chamber to avoid the contamination due to tritium diffusion in the chamber. The protective electrode was introduced to reduce the leakage current when measuring the lowlevel radioactivity. Sapphire was employed as an insulator between the protective electrode and central electrode, while Al2O3 ceramic was used in between the protective electrode and the external electrode. In addition, to meet the specific requirements on the measurement of ICF targets’ parameters, a component used to crash the target to release tritium was designed in the chamber. Finally, the optimal chamber parameters were obtained in terms of physics modeling and combination loss computation.
- tritium absorption,
- ICF target,
- isolator,
- guard ring,
- metallic seal
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Design of Ionization Chamber Used to Measure Activity of Tritium Enclosed in ICF Targets

doi: 10.11804/NuclPhysRev.27.03.304

China Academy of Engineering Physics, Mianyang 621900, Sichuan, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2010-09-20

Key words:

Abstract: A cylindrical ionization chamber was designed for the measurement of the tritium at the level enclosed in inertial confinement fusion(ICF) targets. In stead of the conventional rubber seals, the metallic seals was adopted to reduce the chamber contamination caused by the strong tritium absorption of rubber and plastics. A 2 μmthick Au layer was plated on the inner wall of the chamber to avoid the contamination due to tritium diffusion in the chamber. The protective electrode was introduced to reduce the leakage current when measuring the lowlevel radioactivity. Sapphire was employed as an insulator between the protective electrode and central electrode, while Al2O3 ceramic was used in between the protective electrode and the external electrode. In addition, to meet the specific requirements on the measurement of ICF targets’ parameters, a component used to crash the target to release tritium was designed in the chamber. Finally, the optimal chamber parameters were obtained in terms of physics modeling and combination loss computation.

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