HEMT-based photon-counting energy-resolving ultra-fast x-ray detector with improved sensitivity

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Pub Date : 2014-11-01 DOI:10.1109/NSSMIC.2014.7430887

M. G. Ertosun, C. Levin

{"title":"HEMT-based photon-counting energy-resolving ultra-fast x-ray detector with improved sensitivity","authors":"M. G. Ertosun, C. Levin","doi":"10.1109/NSSMIC.2014.7430887","DOIUrl":null,"url":null,"abstract":"We proposed to explore extremely fast digital switching devices used in telecommunications for use as photon counting, energy resolving x-ray detectors. The HEMT (High Electron Mobility Transistor), used in ultra-fast switches and low noise amplifiers, offers a very low noise and high frequency operation. For this study a HEMT-based photon-counting energy-resolving ultra-fast x-ray detector with improved sensitivity is proposed and studied via simulations. The hypothesis is that the x-ray interactions within the structure will be detected by monitoring the degradation in a data bit transmission (gating time and counting for bit errors) across the transistor. By monitoring the bit error rate and time for error free vs. erroneous transmission, one can calibrate and estimate the x-ray flux and energy. The aim of this study is to explore HEMT-based detector concept further and improve its sensitivity via incorporating a 500 um thick monolithically integrated absorber and study the characteristics of this new structure. We simulated cases for 10, 50 and 100 KeV photon energies, and the drain current pulse heights for the event detection of 10, 50 and 100 KeV photons were 4.18e-6A, 1.22e-5A, 1.98e-5A, respectively.","PeriodicalId":144711,"journal":{"name":"2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/NSSMIC.2014.7430887","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 0

Abstract

We proposed to explore extremely fast digital switching devices used in telecommunications for use as photon counting, energy resolving x-ray detectors. The HEMT (High Electron Mobility Transistor), used in ultra-fast switches and low noise amplifiers, offers a very low noise and high frequency operation. For this study a HEMT-based photon-counting energy-resolving ultra-fast x-ray detector with improved sensitivity is proposed and studied via simulations. The hypothesis is that the x-ray interactions within the structure will be detected by monitoring the degradation in a data bit transmission (gating time and counting for bit errors) across the transistor. By monitoring the bit error rate and time for error free vs. erroneous transmission, one can calibrate and estimate the x-ray flux and energy. The aim of this study is to explore HEMT-based detector concept further and improve its sensitivity via incorporating a 500 um thick monolithically integrated absorber and study the characteristics of this new structure. We simulated cases for 10, 50 and 100 KeV photon energies, and the drain current pulse heights for the event detection of 10, 50 and 100 KeV photons were 4.18e-6A, 1.22e-5A, 1.98e-5A, respectively.

查看原文本刊更多论文

改进灵敏度的基于hemt的光子计数能量分辨超快x射线探测器

我们建议探索用于电信的极快数字开关设备，用于光子计数，能量解析x射线探测器。HEMT(高电子迁移率晶体管)用于超高速开关和低噪声放大器，提供非常低的噪声和高频工作。为此，本文提出了一种基于hemt的光子计数能量分辨超快x射线探测器，并对其进行了仿真研究。假设是，通过监测晶体管中数据位传输(门控时间和误码计数)的退化，可以检测到结构内的x射线相互作用。通过监测误码率和无差错传输与错误传输的时间，可以校准和估计x射线的通量和能量。本研究的目的是进一步探索基于hemt的探测器概念，并通过加入500 um厚的单片集成吸收体来提高其灵敏度，并研究这种新结构的特性。我们模拟了10、50和100 KeV光子能量的情况，10、50和100 KeV光子的漏极电流脉冲高度分别为4.18e-6A、1.22e-5A和1.98e-5A。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

2014 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

自引率

0.00%

发文量