99 citations · 345 across the 38 of their papers we have counts for
25 papers · 1 filter
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…
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…
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…
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…
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…
Simultaneous scintillation light and charge readout of a pure argon filled Spherical Proportional Counter
R. Bouet, J. Busto, V. Cecchini +20
The possible use of a Spherical Proportional Counter for the search of neutrinoless double beta decay is investigated in the R2D2 R&D project. Dual charge and scintillation light r…
Measurements of the ionization efficiency of protons in methane
G Collaboration, L. Balogh, C. Beaufort +40
The amount of energy released by a nuclear recoil ionizing the atoms of the active volume of detection appears "quenched" compared to an electron of the same kinetic energy. This d…
Quenching factor measurements of neon nuclei in neon gas
L. Balogh, C. Beaufort, A. Brossard +47
The NEWS-G collaboration uses Spherical Proportional Counters (SPCs) to search for weakly interacting massive particles (WIMPs). In this paper, we report the first measurements of…
Neutron spectroscopy with N-filled high-pressure large-volume spherical proportional counters
I. Giomataris, S. Green, I. Katsioulas +9
Precise in-situ measurements of the neutron flux in underground laboratories is crucial for direct dark matter searches, as neutron induced backgrounds can mimic the typical dark m…
Copper electroplating for background suppression in the NEWS-G experiment
G Collaboration, L. Balogh, C. Beaufort +47
New Experiments with Spheres-Gas (NEWS-G) is a dark matter direct detection experiment that will operate at SNOLAB (Canada). Similar to other rare-event searches, the materials use…
R2D2 spherical TPC: first energy resolution results
R. Bouet, J. Busto, V. Cecchini +20
Spherical time projection chambers (TPC), also known as spherical proportional counters, are employed in the search for rare phenomena, such as light Dark Matter candidates. The sp…
A resistive ACHINOS multi-anode structure with DLC coating for spherical proportional counters
I. Giomataris, M. Gros, I. Katsioulas +9
The spherical proportional counter is a gaseous detector used in a variety of applications, including direct dark matter and neutrino-less double beta decay searches. The ACHINOS m…
Development of a Simulation Framework for Spherical Proportional Counters
I. Katsioulas, P. Knights, J. Matthews +4
The spherical proportional counter is a novel gaseous detector with numerous applications, including direct dark matter searches and neutron spectroscopy. The strengths of the Gean…
Experimental Determination of Proton Hardness Factors at Several Irradiation Facilities
P. Allport, F. Bogelspacher, K. Bruce +13
The scheduled High Luminosity upgrade of the CERN Large Hadron Collider presents new challenges in terms of radiation hardness. As a consequence, campaigns to qualify the radiation…
Precision laser-based measurements of the single electron response of SPCs for the NEWS-G light dark matter search experiment
G Collaboration, Q. Arnaud, J. -P. Bard +36
Spherical Proportional Counters (SPCs) are a novel gaseous detector technology employed by the NEWS-G low-mass dark matter search experiment for their high sensitivity to single el…