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    New Radiation-Hard Wavelength Shifting Fibers
    (IEEE, 2016) Bilki, Burak; Onel, Yasar; Tiras, Emrah; Wetzel, James; Winn, David
    R&D on new radiation-hard wavelength shifting fibers is gaining crucial importance as the radiation conditions projected for the High Luminosity LHC and future hadron and lepton colliders reach unprecedented levels. We have identified materials with proven radiation resistance, long Stokes shifts to enable long self-absorption lengths, with decay constants similar to 10 ns or less. Here we describe two strong candidates' Doped ZnO:Zn/Mg and 3HF (3-hydroxyflavone) properties along with other material options and report on basic performance characteristics of recent prototypes.
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    Radiation Damage Studies of New Intrinsically Radiation-Hard Scintillators
    (IEEE, 2016) Bilki, Burak; Onel, Yasar; Tiras, Emrah; Wetzel, James; Winn, David
    Following the development of intrinsically radiation-hard scintillators, we exposed various scintillators tiles to gammas from a Cs-137 source at the University of Iowa Hospitals and Clinics up to 1.4 and 14 Mrad. The results are within expectations and exhibit sufficiently high performance for implementations in the future/upgrade hadron/lepton collider detectors. Here we report on the nature of the irradiation tests and present the results of the laboratory measurements performed continuously for more than 60 days following the irradiation under various recovery conditions.