scholarly journals Effect of Teflon Wrapping on the Interaction Position Reconstruction Resolution in Long Thin Plastic Scintillator Pillars.

2020 ◽  
Author(s):  
Ahmed Moustafa ◽  
Aline Galindo-Tellez ◽  
Melinda Sweany ◽  
Erik Brubaker ◽  
John Mattingly
Author(s):  
Jiaxing Li ◽  
Denggao Zhang ◽  
Pingping Liu

We present here an ellipsoidal timing detector in Radioactive Ion Beam Line in Lanzhou (RIBLL). The photons induced by radioactive beam ions passing through a thin plastic-scintillator foil BC422, emit from the foil center corresponding to one focal point of an aluminum ellipsoidal mirror and are reflected to another focus point at which the cathode of a photomultiplier tube locates. A time resolution of about 115ps is achieved for 12N and the counting rate up to 108 pps is allowed. The simulation was carried out using GEANT4 Monte Carlo toolkit. The photons total collection efficiency following projectile from different position, photon collection efficiency and time resolution of photon to photocathode of 3 different cases were calculated. Also the main factors influencing the detector’s time resolution and some proposals are given.


Author(s):  
A. Galindo-Uribarri ◽  
T.E. Drake ◽  
G.C. Ball ◽  
N.C. Bray ◽  
J.S. Forster ◽  
...  

2001 ◽  
Vol 48 (4) ◽  
pp. 1172-1176 ◽  
Author(s):  
S. Hohara ◽  
F. Saiho ◽  
J. Tanaka ◽  
S. Aoki ◽  
Y. Uozumi ◽  
...  

2012 ◽  
Vol 27 (1) ◽  
pp. 20-27
Author(s):  
Abdulkadir Aydarous ◽  
Anthony Waker

Plastic scintillators, due to their favorable characteristics compared with other dosimetry techniques, were used as detectors to estimate dose distributions in high gradient dose fields. In this study, a thin plastic scintillator (type BC-408) was coupled to a photomultiplier tube and multichannel analyzer as a technique for real-time dose measurements. The well-defined beta, gamma, and beta-gamma emitters (137Cs, 133Ba, 22Na, 109Cd, 55Fe, and 241Am) have enabled parallel depth dose measurements with Monte-Carlo calculations to be critically compared. The measurements of doses were made for depths range of 0.1 mm to 5 mm. The MCNP dose results were comparable with the plastic scintillator detector and can be used to approximately estimate the dose rate values from mixed electron-photon fields. The minimum dose rate that can be measured by the plastic scintillator system was ~2 ?Gy/h and was for 109Cd source of activity 222 Bq.


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