Radiation damage studies on polystyrene-based scintillators

Britvich, G.I.; Peresypkin, A.I.; Rykalin, V.I.; Vasil’chenko, V.G.; Kornylovskaya, L.D.; Malinovskaya, Svetlana; Skripkina, V. T.; Shershukov, V. M.; Yushko, E. G.; Kulichenko, A.V.; Pyshchev, A.I.

doi:10.1016/0168-9002(93)90849-d

Cited by 17 publications

(5 citation statements)

References 5 publications

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“…Due to the fact that CsI is slightly hygroscopic, it is desirable to "seal" the scintillators against potential surface deterioration and thus minimize changes of the detector response throughout the duration of the experiment. Traditional polishing and wrapping methods cannot ensure long term stability of the relevant scintillation parameters due to the insufficient chemical resistance of alkali halides [9]. Furthermore, a suitable protective coating of the crystal surfaces can at the same time be used to modulate the scintillator light collection properties and can be easily removed, if necessary.…”

Section: Csi Crystal Surface Treatmentmentioning

confidence: 99%

Light response of pure CsI calorimeter crystals painted with wavelength-shifting lacquer

Frlež

Brönnimann

Krause

et al. 2001

Nuclear Instruments and Methods in Physics Research Section A:

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We have measured scintillation properties of pure CsI crystals used in the shower calorimeter built for a precise determination of the π + →π 0 e + ν e decay rate at the Paul Scherrer Institute (PSI). All 240 individual crystals painted with a special wavelength-shifting solution were examined in a custom-build detection apparatus (RASTA-radioactive source tomography apparatus) that uses a 137 Cs radioactive gamma source, cosmic muons and a light emitting diode as complementary probes of the scintillator light response. We have extracted the total light output, axial light collection nonuniformities and timing responses of the individual CsI crystals. These results predict improved performance of the 3π sr PIBETA calorimeter due to the painted lateral surfaces of 240 CsI crystals. The wavelength-shifting paint treatment did not affect appreciably the total light output and timing resolution of our crystal sample. The predicted energy resolution for positrons and photons in the energy range of 10-100 MeV was nevertheless improved due to the more favorable axial light collection probability variation. We have compared simulated calorimeter ADC spectra due to 70 MeV positrons and photons with a Monte Carlo calculation of an ideal detector light response.

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Section: Csi Crystal Surface Treatmentmentioning

confidence: 99%

Light response of pure CsI calorimeter crystals painted with wavelength-shifting lacquer

Frlež

Brönnimann

Krause

et al. 2001

Nuclear Instruments and Methods in Physics Research Section A:

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“…Deterioration of properties or "aging" of scintillator detectors can occur due to degradation of the scintillator base (polystyrene) and the dopants and due to degradation of the WLS fiber and the filler. Some aspects of radiation hardness and natural aging studies are published in [29][30][31][32][33][34][35][36][37][38].…”

Section: Radiation Hardness Studymentioning

confidence: 99%

Light yield and radiation hardness studies of scintillator strips with a filler

Artikov

Baranov

Budagov

et al. 2019

Nuclear Instruments and Methods in Physics Research Section A:

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Detectors based on polystyrene scintillator strips with WLS fiber readout are widely used to register charged particles in many highenergy physics experiments. The fibers are placed into grooves or holes along the strip. The detection efficiency of these devices can be significantly increased by improving the optical contact between the scintillator and the fiber by adding an optical filler into the groove/hole. This work is devoted to the study of the light yield of a 5-m-long scintillator strip with a 1.2-mm-diameter Kuraray Y11(200) MC WLS fiber inserted into the strip's co-extruded hole filled with synthetic silicon resin SKTN-MED(E). The light yield was studied using cosmic muons and a 60 radioactive source. Radiation hardness study of viscous fillers and short strip samples were performed on the IBR-2 pulsed research reactor of fast neutrons at JINR.

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“…The chemical formulae of the used additives and maxima of their wavelengths emission λ em are indicated in Appendix. The glass ampoules with the solutions of about 100 Sm 3 were sealed off after pumping-out the air during 10÷15 min and polymerized in a polysilicone bath at a temperature of about t 180 0 s during 24 hours [15]. Preliminary measurements showed that the process of darkening caused by the decomposition of metalloorganic additives at this temperature of polymerization (the temperature of decomposition for TPB additive is about t 160 o s) was observed in the samples containing TPB additive.…”

Section: Samples Fabrication By Bulk-polymerization Techniquementioning

confidence: 99%

“…Taking into account the prolonged time (∼10 yr) of scintillators operation under the irradiation in EM-calorimeters, it is clear that the study of the samples relative light output I/I o just after the end of irradiation (in 20÷30 min) as well as in t rec =23 days of recovery in air [15,21,20] became an essential part of our radiation properties investigation. For thin scintillator plates with thickness h=1.1 mm, the relative light output from points in a range 2.5< l < 15 cm was measured.…”

Section: Radiation Resistance Testsmentioning

confidence: 99%

“…It is obvious that in order to increase the light output of heavy scintillators, one should also use such primary additives that can be solved in the monomer with a concentration >5 %. Besides, the high concentration of some primary additives also improves the radiation resistance of plastic scintillators [15,20].…”

Section: Scintillation and Radiation Properties Of New Heavy Scintillmentioning

confidence: 99%

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Search for new scintillators for high-energy resolution electromagnetic calorimeters

Britvich

Vasil’chenko

et al. 1999

Nuclear Instruments and Methods in Physics Research Section A:

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Radiation damage studies on polystyrene-based scintillators

Cited by 17 publications

References 5 publications

Light response of pure CsI calorimeter crystals painted with wavelength-shifting lacquer

Light response of pure CsI calorimeter crystals painted with wavelength-shifting lacquer

Light yield and radiation hardness studies of scintillator strips with a filler

Search for new scintillators for high-energy resolution electromagnetic calorimeters

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