Developments in particle tracking using the Birmingham Positron Camera
Developments in particle tracking using the Birmingham Positron Camera
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DOI：
10.1016/s0168-9002(97)00301-x
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发表时间：
1997-06-21
影响因子：
1.4
通讯作者：
Beynon, TD
中科院分区：
文献类型：
--
作者：
Parker, DJ;Allen, DA;Beynon, TD
RAL/伯明翰正电子相机由一对MWPC组成，用于探测由正电子-电子湮没产生的背靠背511keV光子对。它建造于1984年，目的是将PET应用于工程情况，并已被广泛用于流动的非侵入性成像，包括对地质样品的广泛研究。伯明翰开发了正电子发射粒子跟踪(PEPT)技术，通过该技术可以高速跟踪单个发射正电子的粒子，并已被证明是研究混合器和流态化床等系统中颗粒材料行为的非常强大的工具。为了扩大其有效视场，该相机最近安装在计算机控制的电动平移工作台上，以便跟踪示踪粒子的运动，最长可达1.5米。还对利用两个探测器中的单计数率增强PEPT技术的可行性进行了初步研究。
The RAL/Birmingham Positron Camera consists of a pair of MWPCs for detecting the pairs of back-to-back 511 keV photons arising from positron-electron annihilation. It was constructed in 1984 for the purpose of applying PET to engineering situations, and has been widely used for the non-invasive imaging of flow, including extensive studies on geological samples. The technique of Positron Emission Particle Tracking (PEPT), whereby a single positron-emitting tracer particle can be tracked at high speed, was developed at Birmingham and has proved a very powerful tool for studying the behaviour of granular materials in systems such as mixers and fluidised beds. In order to extend its effective field of view, the camera has recently been mounted on a motorised translation stage under computer control so that the motion of a tracer particle can be followed over a length of up to 1.5 m. A preliminary investigation into the feasibility of enhancing the PEPT technique using the singles count rates in the two detectors has also been undertaken.