کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
234074 | 465384 | 2011 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Studies of the effect of tracer activity on time-averaged positron emission particle tracking measurements on tumbling mills at PEPT Cape Town Studies of the effect of tracer activity on time-averaged positron emission particle tracking measurements on tumbling mills at PEPT Cape Town](/preview/png/234074.png)
The statistical uncertainties associated with time-averaged positron emission particle tracking (PEPT) measurements of the position, velocity and acceleration of a small tracer particle have been investigated. Experiments were undertaken using the ECAT ‘EXACT3D’ PET scanner recently installed at the facilities of PEPT Cape Town at iThemba LABS, South Africa. Small “button” sources of 68Ga were attached to the outer shell of a small mill and PEPT data were recorded over several half-lives, for the cases of the mill being empty and entirely filled with steel balls. The effect of tracer activity on the statistical uncertainties in the positions, velocities and accelerations derived from the measurements was investigated, as a first step towards fully quantifying the uncertainties associated with tracking particles via PEPT in laboratory-scale tumbling mills.
Research highlights
► First positron emission particle tracking measurements from PEPT Cape Town.
► Estimates of statistical uncertainties of PEPT measurements using a laboratory-scale mill.
► Consequences for comminution studies using PEPT.
Journal: Minerals Engineering - Volume 24, Issues 3–4, February–March 2011, Pages 261–266