T. Kaptanoglu
A5024945542- Neutrino Physics Research
- Radiation Detection and Scintillator Technologies
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Medical Imaging Techniques and Applications
- Nuclear Physics and Applications
- Nuclear physics research studies
- Radioactive Decay and Measurement Techniques
University of California, Berkeley
2021-2024
Lawrence Berkeley National Laboratory
2021-2024
Campbell Collaboration
2023
University of Pennsylvania
2016-2021
SNO+ is a large liquid scintillator-based experiment located 2km underground at SNOLAB, Sudbury, Canada. It reuses the Sudbury Neutrino Observatory detector, consisting of 12m diameter acrylic vessel which will be filled with about 780 tonnes ultra-pure scintillator. Designed as multipurpose neutrino experiment, primary goal search for neutrinoless double-beta decay (0$\nu\beta\beta$) 130Te. In Phase I, detector loaded 0.3% natural tellurium, corresponding to nearly 800 kg 130Te, an expected...
Abstract New developments in liquid scintillators, high-efficiency, fast photon detectors, and chromatic sorting have opened up the possibility for building a large-scale detector that can discriminate between Cherenkov scintillation signals. Such could reconstruct particle direction species using light while also having excellent energy resolution low threshold of scintillator detector. Situated deep underground, utilizing new techniques computing reconstruction, this achieve unprecedented...
EOS is a technology demonstrator, designed to explore the capabilities of hybrid event detection technology, leveraging both Cherenkov and scintillation light simultaneously. With fiducial mass four tons, operate in high-precision regime, with sufficient size utilize time-of-flight information for full reconstruction, flexibility demonstrate range cutting edge technologies, simplicity design facilitate potential future deployment at alternative sites. Results from can inform neutrino...
The direction of individual <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mmultiscripts><a:mrow><a:mi mathvariant="normal">B</a:mi></a:mrow><a:mprescripts/><a:none/><a:mrow><a:mn>8</a:mn></a:mrow></a:mmultiscripts></a:mrow></a:math> solar neutrinos has been reconstructed using the <d:math xmlns:d="http://www.w3.org/1998/Math/MathML" display="inline"><d:mrow><d:mi>SNO</d:mi><d:mo>+</d:mo></d:mrow></d:math> liquid scintillator detector. Prompt, directional...
A measurement of the $^{8}\mathrm{B}$ solar neutrino flux has been made using a 69.2 kt-day dataset acquired with $\mathrm{SNO}+$ detector during its water commissioning phase. At energies above 6 MeV is an extremely pure sample elastic scattering events, owing primarily to detector's deep location, allowing accurate relatively little exposure. In that energy region best fit background rate $0.2{5}_{\ensuremath{-}0.07}^{+0.09}\text{ }\text{...
This paper reports results from a search for nucleon decay through invisible modes, where no visible energy is directly deposited during the itself, initial water phase of $\mathrm{SNO}+$. However, such decays within oxygen nucleus would produce an excited daughter that subsequently deexcite, often emitting detectable gamma rays. A rays yields limits $2.5\ifmmode\times\else\texttimes\fi{}{10}^{29}\text{ }\text{ }\mathrm{y}$ at 90% Bayesian credibility level (with prior uniform in rate)...
Linear alkyl benzene (LAB) has in recent years been used as a solvent for PPO large-scale scintillation detectors, like Daya Bay and SNO+. The combination several nice properties, including high light yield, good materials compatibility, excellent pulse shape discrimination. As charged particles move through the LAB+PPO, both Cherenkov are created. Separating from would allow broad range of physics future detectors THEIA, by allowing direction reconstruction with while retaining yield...
We describe here measurements with a new device, the ``dichroicon,'' Winston-style light concentrator built out of dichroic reflectors, which could allow large-scale neutrino detectors to sort photons by wavelength small overall loss. Photon sorting would benefit water or ice Cherenkov such as Hyper-Kamiokande IceCube providing measure dispersion, which, in turn, improved position reconstruction and timing. For scintillator like JUNO upgrades $\mathrm{SNO}+$ KamLAND-ZEN water-based liquid...
Abstract This manuscript describes measurements of water-based liquid scintillators (WbLS), demonstrating separation the Cherenkov and scintillation components using a low energy $$\beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>β</mml:mi> </mml:math> source fast timing response Large Area Picosecond Photodetector (LAPPD). Additionally, time profiles three WbLS mixtures, defined by relative fractions scintillating compound, are characterized, with improved...
Abstract One of the most promising approaches for next generation neutrino experiments is realization large hybrid Cherenkov/scintillation detectors made possible by recent innovations in photodetection technology and liquid scintillator chemistry. The development a potentially suitable future detector with particularly slow light emission discussed present publication. This cocktail compared respect to its fundamental characteristics (scintillation efficiency, transparency, time profile...
Abstract Large-scale optical neutrino and dark-matter detectors rely on large-area photomultiplier tubes (PMTs) for cost-effective light detection. The new R14688-100 8-inch PMT developed by Hamamatsu provides state-of-the-art timing resolution of around 1 ns (FWHM), which can help improve vertex reconstruction enable Cherenkov scintillation separation in scintillation-based detectors. This also excellent charge resolution, allowing precision photoelectron counting improved energy...
The $\mathrm{SNO}+$ experiment collected data as a low-threshold water Cherenkov detector from September 2017 to July 2019. Measurements of the 2.2-MeV $\ensuremath{\gamma}$'s produced by neutron capture on hydrogen were made using an Am-Be calibration source, for which large fraction emitted neutrons are simultaneously with 4.4-MeV $\ensuremath{\gamma}$. Analysis delayed coincidence between $\ensuremath{\gamma}$ and revealed detection efficiency that is centered around 50% varies at level...
SNO+ is a large-scale liquid scintillator experiment with the primary goal of searching for neutrinoless double beta decay, and located approximately 2 km underground in SNOLAB, Sudbury, Canada. The detector acquired data two years as pure water Cherenkov detector, starting May 2017. During this period, optical properties were measured situ using deployed light diffusing sphere, improving model energy response systematic uncertainties. parameters included attenuation coefficients, effective...
Abstract A liquid scintillator consisting of linear alkylbenzene as the solvent and 2,5-diphenyloxazole fluor was developed for SNO+ experiment. This mixture chosen it is compatible with acrylic has a competitive light yield to pre-existing scintillators while conferring other advantages including longer attenuation lengths, superior safety characteristics, chemical simplicity, ease handling, logistical availability. Its properties have been extensively characterized are presented here. now...
One of the most promising approaches for next generation neutrino experiments is realization large hybrid Cherenkov/scintillation detectors made possible by recent innovations in photodetection technology and liquid scintillator chemistry. The development a potentially suitable future detector with particularly slow light emission discussed present publication. This cocktail compared respect to its fundamental characteristics (scintillation efficiency, transparency, time profile emission)...
The SNO+ detector operated initially as a water Cherenkov detector. implementation of sealed covergas system midway through data taking resulted in significant reduction the activity $^{222}$Rn daughters and allowed lowest background to solar electron scattering signal above 5 MeV achieved date. This paper reports an updated phase $^8$B neutrino analysis with total livetime 282.4 days threshold 3.5 MeV. flux is found be...
The direction of individual $^8$B solar neutrinos has been reconstructed using the SNO+ liquid scintillator detector. Prompt, directional Cherenkov light was separated from slower, isotropic scintillation time information, and a maximum likelihood method used to reconstruct scattered electrons. A clear signal observed, correlated with angle. observation aided by period low primary fluor concentration that resulted in slower decay time. This is first event-by-event reconstruction high...
Abstract Next-generation large-scale neutrino detectors, from Eos , at the 1 t scale, to Theia 10 s-of-kt will utilize differences in both scintillation and Cherenkov light emission for different particle species perform background rejection. This manuscript presents measurements of yield time profile water-based liquid scintillator samples response $$\alpha $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>α</mml:mi> </mml:math> radiation. These are used as input...
Water Cherenkov and scintillator detectors are a critical tool for neutrino physics.Their large size, low threshold, operational cost make them excellent long baseline oscillations, proton decay, supernova solar neutrinos, double beta ultra-high energy astrophysical neutrinos. Proposals new generation of rely on the availability format, fast, cost-effective photomultiplier tubes. The Electron Tubes Enterprises, Ltd (ETEL) D784KFLB 11 inch Photomultiplier Tube has been developed detectors. We...
Large-scale optical neutrino and dark-matter detectors rely on large-area photomultiplier tubes (PMTs) for cost-effective light detection. The new R14688-100 8-inch PMT developed by Hamamatsu provides state-of-the-art timing resolution of around 1 ns (FWHM), which can help improve vertex reconstruction enable Cherenkov scintillation separation in scintillation-based detectors. This also excellent charge resolution, allowing precision photoelectron counting improved energy reconstruction. Eos...