Workshop on Xenon Detector 0νββ Searches: Steps Towards the Kilotonne Scale

Session

Session 1/1

26 Oct 2023, 16:00

48/1-112C/D - Redwood C/D (SLAC)

58. Cherenkov Light Separation in LXe for Improved Background Rejection

Ako Jamil (Princeton University)

26/10/2023, 16:00

Lightning talk

With the development of fast sub-nanosecond photosensors and the increasing size of xenon-based detectors for neutrinoless double beta decay ($0\nu\beta\beta$) the time-of-flight difference between scintillation and Cherenkov light can be exploited for further background mitigation. This is especially crucial for the rejection of elastic scattering of solar neutrinos, which presents a major...

2. Solid Dreams: Advancing 0vbb and Dark Matter Detection with Crystalline Xenon TPCs

Qing Xia (LBNL)

26/10/2023, 16:07

Lightning talk

In this talk, we present the performance of a novel crystalline/vapor xenon TPC. Compared to liquid xenon, crystal xenon demonstrates >10^3 lower activity in radon, which is a leading background source in liquid xenon dark matter experiments (Pb214 betas) and tonne-scale 0vbb detectors (Bi214 gammas). The powerful radon exclusion capability of crystal xenon enables a larger fiducial volume for...

3. Solar Neutrino Detection via Charged Current Interactions at the Kilotonne Scale

Glenn Richardson (Yale University)

26/10/2023, 16:14

Lightning talk

Thanks to recent observations of long-lived excited Cesium-136 states, xenon detectors now have the potential to serve as solar neutrino observatories by using charged-current interactions of the form $\nu_e + ^{136}Xe \rightarrow ^{136}Cs^* + e^{-}$. This new detection method will be particularly potent at the kilotonne scale. In this lightning talk, I will discuss the projected capabilities...

5. Detecting Supernova Electron-Neutrinos in Large Xenon Detectors

Samuel Hedges (LLNL)

26/10/2023, 16:21

Large underground xenon detectors have strong potential for detecting supernova neutrinos. For 0vBB detectors, optimized for MeV-scale signals, electron-neutrino charged-current interactions provide one means to detect the intense flux of neutrinos emitted by a supernova. There are few existing detectors capable of measuring the electron-neutrino component of the supernova neutrino flux, which...

7. FAT-GEM detectors for operation in noble elements

Sara Leardini

26/10/2023, 16:28

Lightning talk

We introduced in 2019 a new concept for electroluminescence in noble elements, based on very-thick acrylic-based perforated structures (Field-Assisted Transparent Gas Electroluminescence Multipliers, or FAT-GEMs). The structures, other than being radio pure, scalable and robust, are also transparent, opening to the possibility of enhancing light collection efficiency. In this work we present...

13. R&D for LAr + Xe + photosensitive dopants

Fernanda Psihas

26/10/2023, 16:35

LArTPCs are the technology of choice for current and future neutrino experiments, including those expected to make eagerly awaited measurements of accelerator neutrino oscillations in the coming decade. This technology provides a large active volume and sensitivity to GeV signals like accelerator neutrinos all the way down to 10s of MeV, covering part of the supernova neutrino...

12. TinyTPC - A test stand for photosensitive dopants

Panagiotis Englezos (Rutgers University)

26/10/2023, 16:42

LArTPCs highly doped with Xenon could be interesting platforms for probing MeV- and sub-MeV physics including neutrinoless-double beta decay. A main hurdle is the small fraction of scintillation photons that are collected, which significantly impacts LArTPCs' energy resolution. One solution is the use of photosensitive dopants, which convert light to charge. A team from Rutgers University and...

62. An Atmospheric Xenon TPC for Neutrinoless Double Beta Decay

Nicholas Byrnes (University of Texas Arlington)

26/10/2023, 16:49

Lightning talk

In modern searches for neutrinoless double beta decay ($0\nu\beta\beta$) using $^{136}$Xe, one possible avenue being explored by collaborations such as NEXT is the use of a high-pressure gaseous Time Projection Chamber (TPC). The principal reasons for using gas TPCs are to exploit the low intrinsic recombination of the gas and the ability to use electroluminescence as a method of stable gain...

65. MeV-scale internal calibration sources for large LXe detectors

Brian Lenardo (SLAC)

26/10/2023, 16:56

Lightning talk

By design, large-scale liquid xenon TPCs enjoy powerful self-shielding; gamma rays that would create backgrounds are strongly attenuated by the liquid at the edges of the detector. This, however, presents a challenge for calibrations: calibration sources placed outside the detector will only rarely penetrate to the center of the TPC, making the most sensitive region of the experiment also the...

66. 3He Neutron Capture in xenon gas experiments

Leslie Rogers (argonne national laboratory)

26/10/2023, 17:03

Helium 3 has a high neutron capture cross section and adding it to xenon can mitigate Xe136 to Xe137 capture which decays in our region of interest.