کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1830839 1027486 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Radiation detector based on liquid crystal light valve for large-area imaging applications
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
پیش نمایش صفحه اول مقاله
Radiation detector based on liquid crystal light valve for large-area imaging applications
چکیده انگلیسی
Currently most large-area radiation detectors rely on the use of a phosphor screen and an optical sensor. In such conversion process, there will be signal loss due to inefficiencies in coupling between phosphor screen and later light-detection components. This paper presents a radiation detector based on X-ray induced light transmittance of liquid crystal (LC) as a function of radiation. Our detector incorporates a europium-doped gadolinium oxide (Gd2O3:Eu) phosphor and an amorphous selenium (a-Se)-coupled LC light valve. The Gd2O3:Eu is synthesized using a low-temperature solution-combustion method, and the optical properties of the Gd2O3:Eu are investigated as a function of a sintering temperature. The transmission-voltage (T-V) curve and the optical response of the detector are also investigated. Our experimental results show good T-V characteristics of the LC, switching between 12% and 86% transmission. The radiation dose is also presented in this work. The results show that our detector can operate at low X-ray dose and, therefore, a promising application is the medical-imaging detector.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 576, Issue 1, 11 June 2007, Pages 83-86
نویسندگان
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