[en] Two types of Large Area Plastic Scintillator Detector with different size and model were described. The basic construction and working process was introduced. A Characteristics contrasting was made between the two types of Large Area Plastic Scintillator Detectors. The technology designing of the whole detector components was also described here. (authors)

[en] Short communication

[en] The apparatus described is claimed to be an improvement of that described in BP 1403265. It comprises a housing having a plastic scintillator sheet located at its base, together with a sealing ring at the base so as to afford a hermetic light-weight seal between a supporting surface and the base of the housing. Photomultiplier means are optically coupled to the scintillator sheet to amplify the scintillations, and a pump is provided to reduce air pressure in the region of the sheet to substantially below atmospheric pressure. The pump has a variable volume chamber, manually operable to reduce the volume, with a releasable latch to secure the pump in the reduced volume condition and a spring to increase the volume of the chamber and thus reduce the air pressure in the region of the scintillator sheet when the latch is released. The pump may be formed by the housing part of which is telescopically slidable within the other part. Alternatively a lever-operated rolling diaphragm pump may be used. With this arrangement there is no need to provide a pressure relief non-return valve to vent air from the apparatus. (U.K.)

[en] Plastic scintillators offer several advantages for nuclear safeguards research and technology to those who design, assemble, encapsulate, and calibrate detectors from raw materials that are commercially available. These large, inexpensive detectors have good spatial uniformity and good high-energy gamma-ray response. Uniform light collection is obtained with a light pipe attached to a polished scintillator wrapped with aluminum foil. Best low-energy response is obtained by applying a variance analyzer to select the low-energy bias level

[en] We have studied light production and propagation in three different samples of plastic scintillating fibers manufactured by Kyowa Gas Co.: SCSF-81, SCSF-38 and SCSF-38 with a quenching additive. The emission time distribution is described phenomenologically by a fast two-step scintillation process and an additional slow component, the time constants of which are determined. The light yield from the fibers is measured as a function of distance for the two light components which propagate by total internal reflection from the core-clad interface and from the clad-air interface. We obtain the absolute light yield and attenuation lengths for the different fibers. (orig.)

[en] New scintillator and wave length shifter developments at Saclay have produced ameliorations, both from the point of view of cost and operating characteristics. (Auth.)

[en] This report presents the results of measurements and simulations performed with 12 small plastic scintillation detectors manufactured by Scionix for imaging applications. The scintillator is equivalent to a Bicron BC-420 plastic scintillator. A gamma calibration is presented to determine the voltage to be applied on each detector to ensure uniform detector operation. Time of flight measurements performed with a Cf-252 source are also presented. Comparisons between experimental data and data from the Monte Carlo simulations show good agreement for time lags of 0 to 70 ns

[en] Recent developments of plastic scintillators are reviewed, from January 2000 to June 2015. All examples are distributed into the main application, i.e. how the plastic scintillator was modified to enhance the detection towards a given radiation particle. The main characteristics of these newly created scintillators and their detection properties are given. (authors)

[en] Plastic scintillation detectors have been used in nuclear and high energy physics for many decades. Among their benefits are fast response, ease of manufacture and versatility. Their main drawbacks are radiation resistance and cost. Plastic Scintillators can be described as solid materials which contain organic fluorescent compounds dissolved within a polymer matri10. Transparent plastics commonly used for light scintillation are Polystyrene (or PS, poly-vinyl-benzene) and polyvinyl-toluene (or PVT, poly-methyl-styron). In this activity, preliminary studies for low cost plastic scintillator production by using commercial polystyrene pellets and extrusion method were aimed. For this purpose, PS blocks consist of commercial fluorescent dopant were prepared by an extruder in SANAEM. Molds suitable for extruder were designed and manufactured and optimum production parameters such as extrusion temperature profile, extrusion rate and pressure were obtained. Plastic blocks prepared were optically and mechanically tested and its response against various radioactive sources was measured.This study has shown that plastic scintillators imported can be produced in SANAEM domestically and be used for detection of radioactive materials within the country or border gates.

[en] Prototype samples of plastic scintillators containing up to 10% by weight of natural boron have been produced. The maximum size scintillators made to date are 28 mm dia. x 100 mm long. Rods containing up to 2% boron are now made routinely and work is progressing on higher concentrations. The plastics are clear and emit the same blue fluorescence as other common plastic scintillators. It is expected that rods up to 3'' dia. containing 5% boron will be produced during the next few months. BC-454 is particularly useful in neutron research, materials studies, some types of neutron dosimetry, and monitoring of medium to high energy neutrons in the presence of other types radiation. It combines attractive features that enhance its usefulness to the physics community