Yazar "Wetzel, James" seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim Yok
    Öğe
    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.
  • Küçük Resim Yok
    Öğe
    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.
  • Küçük Resim
    Öğe
    Scintillation Timing Characteristics Of Common Plastics For Radiation Detection Excited With 120 Gev Protons
    (TÜBİTAK, 2019) Bilki, Burak; Bostan, Nilay; Köseyan, Ohannes Kamer; Tıraş, Emrah; Wetzel, James
    The timing characteristics of scintillators must be understood in order to determine which applications they are appropriate for. Polyethylene naphthalate (PEN) and polyethylene teraphthalate (PET) are common plastics with uncommon scintillation properties. Here, we report the timing characteristics of PEN and PET, determined by exciting them with 120 GeV protons. The test beam was provided by Fermi National Accelerator Laboratory, and the scintillators were tested at the Fermilab Test Beam Facility. PEN and PET are found to have dominant decay constants of 34.91 ns and 6.78 ns, respectively.