99 citations · 345 across the 38 of their papers we have counts for
39 papers
Response of a nitrogen-filled spherical proportional counter to mono-energetic neutrons
T. Avgitas, M. Axiotis, Z. Balmforth +16
Neutron spectroscopy is an invaluable tool for a wide range of scientific and industrial applications, however, current approaches suffer from limitations that restrict their field…
Reducing simulation-related emissions in rare-event searches through optimised event biasing
P. Knights, L. J. Milligan, K. Nikolopoulos
Rare-event search experiments continue to extend their sensitivities to unprecedented levels. This requires increasingly small backgrounds, and shielding schemes that can suppress…
Optimisation of importance sampling implementation in rare-event shielding simulations using Geant4
P. Knights, L. J. Milligan, K. Nikolopoulos
Rare-event search experiments demand ever-lower backgrounds, and the resulting radio-pure materials and suppressive shielding make related background simulations computationally ex…
Hydrofluoric acid-free titanium etching for rare-event searches
P. Knights, I. Manthos, K. Nikolopoulos +3
Rare-event search experiments require construction materials with high radiopurity to minimise background contributions. Thanks to its high mechanical strength, low density, machin…
Overlap-aware segmentation for topological reconstruction of obscured objects
J. Schueler, H. M. Araújo, S. N. Balashov +30
The separation of overlapping objects presents a significant challenge in scientific imaging. While deep learning segmentation-regression algorithms can predict pixel-wise intensit…
Design of high-strength, radiopure, electroformed copper-based alloys for rare-event searches: Impact of layer configuration on heat treatments
D. Spathara, P. Knights, K. Nikolopoulos
State-of-the-art and next-generation rare-event search experiments rely on detector materials with stringent requirements on radiopurity and mechanical performance. Additive-free e…
Titanium for rare-event searches: Hydrofluoric acid-free etching
P. Knights, K. Nikolopoulos, G. Rogers +2
Rare-event search experiments require construction materials with high radiopurity to minimise background contributions. Thanks to its high mechanical strength, low density, machin…
Materials Design for the Synthesis of High Strength Radiopure Copper Alloys for Rare Event Detection
Dimitra Spathara, Patrick Knights, Konstantinos Nikolopoulos
Additive-free electroformed copper has emerged as the material of choice in exceptionally radiopure detectors for rare-event searches, based on its radiopurity, physical properties…
Searches for light Dark Matter with Spherical Proportional Counters
Patrick Knights, Konstantinos Nikolopoulos
Elucidating the nature of dark matter is a key priority that would involve discovering new fundamental physics and is essential for understanding the structure and evolution of the…
The ionization yield in a methane-filled spherical proportional counter
M. M. Arora, L. Balogh, C. Beaufort +40
Spherical proportional counters (SPCs) are gaseous particle detectors sensitive to single ionization electrons in their target media, with large detector volumes and low background…
Search for Light Dark Matter with NEWS-G at the Laboratoire Souterrain de Modane Using a Methane Target
M. M. Arora, L. Balogh, C. Beaufort +40
The NEWS-G direct detection experiment uses spherical proportional counters to search for light dark matter candidates. New results from a 10 day physics run with a $135\,\mathrm{c…
Transforming a rare event search into a not-so-rare event search in real-time with deep learning-based object detection
J. Schueler, H. M. Araújo, S. N. Balashov +40
Deep learning-based object detection algorithms enable the simultaneous classification and localization of any number of objects in image data. Many of these algorithms are capable…
Measurement of scintillation from proportional electron multiplication in liquid xenon using a needle
P. Knights, H. Sekiya, I. Katsioulas +3
Charge amplification in liquids could provide single-phase xenon time projection chambers with background discrimination and fiducialisation capabilities similar to those found in…
First operation of an ACHINOS-equipped Spherical Proportional Counter with individual anode read-out
D. Herd, I. Katsioulas, P. Knights +6
The multi-anode sensor ACHINOS revolutionised the capabilities of the spherical proportional counter by enabling large-size, high-pressure, operation and TPC-like reconstruction ca…
Performance of a spherical high pressure gas TPC for neutrino magnetic moment measurement
R. Bouet, J. Busto, V. Cecchini +20
The measurement of neutrino magnetic moment larger than would be a clear signature of physics beyond the standard model other than the existence of massive Dirac neut…
Exploring light dark matter with the DarkSPHERE spherical proportional counter electroformed underground at the Boulby Underground Laboratory
L. Balogh, C. Beaufort, M. Chapellier +37
We present the conceptual design and the physics potential of DarkSPHERE, a proposed 3 m in diameter spherical proportional counter electroformed underground at the Boulby Undergro…
ACHINOS: A Multi-Anode Read-Out for Position Reconstruction and Tracking with Spherical Proportional Counters
I. Katsioulas, P. Knights, I. Manthos +4
The spherical proportional counter is a versatile gaseous detector with physics applications ranging from rare event searches to fast neutron spectroscopy. In its simplest form, th…
Purification Efficiency and Radon Emanation of Gas Purifiers used with Pure and Binary Gas Mixtures for Gaseous Dark Matter Detectors
K., Altenmüller, J. F. Castel +22
Rare event searches require extreme radiopurity in all detector components. This includes the active medium, which in the case of gaseous detectors, is the operating gas. The gases…
Fast Neutron Spectroscopy with a High-pressure Nitrogen-filled Large Volume Spherical Proportional Counter
I. Giomataris, I. Katsioulas, P. Knights +7
We present a fast neutron spectroscopy system based on a nitrogen-filled, large volume gaseous detector, the Spherical Proportional Counter. The system has been successfully operat…
Neutron spectroscopy: The case of the spherical proportional counter
I. Giomataris, I. Katsioulas, P. Knights +5
Neutron spectroscopy is an invaluable tool for many scientific and industrial applications, including underground Dark Matter searches. Neutron-induced backgrounds produced by cosm…
Neutron spectroscopy with a high-pressure nitrogen-filled spherical proportional counter
I. Giomataris, S. Green, I. Katsioulas +8
The spherical proportional counter is a large volume gaseous detector which finds application in several fields, including direct Dark Matter searches. When the detector is filled…
The NEWS-G detector at SNOLAB
L. Balogh, C. Beaufort, A. Brossard +38
The New Experiments With Spheres-Gas (NEWS-G) collaboration intends to achieve Weakly Interacting Massive Particles (WIMPs) detection using Spherical Propo…
Coherent elastic neutrino-nucleus scattering: Terrestrial and astrophysical applications
M. Abdullah, H. Abele, D. Akimov +272
Coherent elastic neutrino-nucleus scattering (CENS) is a process in which neutrinos scatter on a nucleus which acts as a single particle. Though the total cross section is large…
EXCESS workshop: Descriptions of rising low-energy spectra
P. Adari, A. Aguilar-Arevalo, D. Amidei +303
Many low-threshold experiments observe sharply rising event rates of yet unknown origins below a few hundred eV, and larger than expected from known backgrounds. Due to the signifi…