M. Słupecki
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View article: Evidence for Anomalies in Muon-Induced Neutron Emissions from Pb
Evidence for Anomalies in Muon-Induced Neutron Emissions from Pb Open
This paper examines neutron multiplicity spectra emitted from massive targets at depths of 3, 40, 210, 583, 1166, and 4000 m.w.e. The measurements, carried out between 2001 and 2024, used three experimental setups with either 14 or 60 He-3…
View article: New Evidence for DM-like Anomalies in neutron multiplicity spectra
New Evidence for DM-like Anomalies in neutron multiplicity spectra Open
Subterrestrial neutron spectra show weak but consistent anomalies at multiplicities ~100 and above. The origin of the excess events remains ambiguous, but, in principle, it could be a signature of Dark Matter WIMP annihilation-like interac…
View article: New Evidence for DM-like Anomalies in Neutron Multiplicity Spectra
New Evidence for DM-like Anomalies in Neutron Multiplicity Spectra Open
Subterrestrial neutron spectra show weak but consistent anomalies at multiplicities ~100 and above. The origin of the excess events remains ambiguous, but, in principle, it could be a signature of Dark Matter WIMP annihilation-like interac…
View article: NEMESIS setup for Indirect Detection of WIMPs
NEMESIS setup for Indirect Detection of WIMPs Open
We summarize the evidence for DM-like anomalies in neutron multiplicity spectra collected underground with Pb targets by three independent experiments: NEMESIS (at 210 m.w.e.) NMDS (at 583 m.w.e.), and ZEPLIN-II (at 2850 m.w.e.). A new ana…
View article: Potential for a precision measurement of solar pp neutrinos in the Serappis experiment
Potential for a precision measurement of solar pp neutrinos in the Serappis experiment Open
The Serappis (SEarch for RAre PP-neutrinos In Scintillator) project aims at a precision measurement of the flux of solar pp neutrinos on the few-percent level. Such a measurement will be a relevant contribution to the study of solar neutri…
View article: DM-like anomalies in neutron multiplicity spectra
DM-like anomalies in neutron multiplicity spectra Open
A new experiment collects data, since November 2019, at a depth of 210 m.w.e. in the Callio Lab in the Pyhasalmi mine in Finland. The setup, called NEMESIS (New Emma MEasurementS Including neutronS), incorporates infrastructure from the EM…
View article: Characteristic properties of Planacon MCP-PMTs
Characteristic properties of Planacon MCP-PMTs Open
A systematic investigation of Planacon MCP-PMTs was performed using 64 XP85002/ FIT-Q photosensors. These devices are equipped with microchannel plates of reduced resistance. Results of a study of their gain stability over time and saturat…
View article: New NEMESIS Results
New NEMESIS Results Open
Funding Information: This work has been supported in part by the EU INTERREG for the Baltic Sea programme within the BSUIN project, and by the Polish Ministry of Science and Higher Education (Grant no. Funding Information: This work has be…
View article: High-multiplicity neutron events registered by NEMESIS experiment
High-multiplicity neutron events registered by NEMESIS experiment Open
Neutron-induced interactions contribute to the signal-mimicking background in deep-underground searches for exotic phenomena such as Dark Matter, neutrino-less double beta decay, proton decay, etc. Apart from radioactive decay, the primary…
View article: Status of the Fast Interaction Trigger for ALICE Collaboration
Status of the Fast Interaction Trigger for ALICE Collaboration Open
Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
View article: Underground investigation of extensive air showers spectra at high energy range of cosmic rays and other research in the Pyhäsalmi mine
Underground investigation of extensive air showers spectra at high energy range of cosmic rays and other research in the Pyhäsalmi mine Open
High energy particles reaching the Earth’s atmosphere are known as cosmic rays. As a result of interactions with nuclei of air molecules, cosmic rays induce showers of secondary particles, which can be divided into 3 components: electromag…
View article: High-multiplicity muon events observed with EMMA array
High-multiplicity muon events observed with EMMA array Open
High-multiplicity data, collected with a segmented scintillator array of the cosmic-ray experiment EMMA (Experiment with Multi-Muon Array), is presented for the first time. The measurements were done at the depth of 75 meters (210 m.w.e.) …
View article: Upgrade of ALICE forward detectors
Upgrade of ALICE forward detectors Open
ALICE will upgrade its subsystems in 2019-2020 to fully benefit from the increased collision rate and luminosity of the LHC at CERN. Two new forward detectors will be installed at the core of ALICE: the Fast Interaction Trigger (FIT) and t…
View article: Acoustic detection of neutrinos in bedrock
Acoustic detection of neutrinos in bedrock Open
We propose to utilize bedrock as a medium for acoustic detection of particle showers following interactions of ultra-high energy neutrinos. With the density of rock three-times larger and the speed of sound four-times larger compared to wa…
View article: Possibilities for Underground Physics in the Pyhäsalmi mine
Possibilities for Underground Physics in the Pyhäsalmi mine Open
The Pyhäsalmi mine is uniquely suited to host new generation of large-scale underground experiments. It was chosen both by the LAGUNA-LBNO and by the LENA Collaboration as the preferred site for a giant neutrino observatory. Regrettably, n…
View article: Calculation of total muon flux observed by Muon Monitor experiment
Calculation of total muon flux observed by Muon Monitor experiment Open
An approach to calculate the flux of cosmicgenic muons detected by Muon Monitor experiment in lab LAB2400 of the Underground Laboratory in Canfranc (LSC) is described. The measuring apparatus consists of three layers of SC16 scintillation …
View article: ALICE forward rapidity upgrades
ALICE forward rapidity upgrades Open
Two forward rapidity upgrades of ALICE apparatus at the LHC are presented: the Muon Forward Tracker and the Fast Interaction Trigger. Their designs are driven by physics performance studies, which have been done using MC simulations. Sever…
View article: A New Low Background Laboratory in the Pyhäsalmi Mine: Towards 14C free liquid scintillator for low energy neutrino experiments
A New Low Background Laboratory in the Pyhäsalmi Mine: Towards 14C free liquid scintillator for low energy neutrino experiments Open
A new low background laboratory in Pyhäsalmi mine in the Central Finland has been put into operation in the beginning of 2017. The laboratory operates at the depth of 1436 m (~4100 meters of water equivalent). In this paper we present desc…
View article: Performance study of the fast timing Cherenkov detector based on a microchannel plate PMT
Performance study of the fast timing Cherenkov detector based on a microchannel plate PMT Open
Prototype of the fast timing Cherenkov detector, applicable in high-energy collider experiments, has been developed basing on the modified Planacon XP85012 MCP-PMT and fused silica radiators. We present the reasons and description of the M…
View article: Muon multiplicities measured using an underground cosmic-ray array
Muon multiplicities measured using an underground cosmic-ray array Open
EMMA (Experiment with Multi-Muon Array) is an underground detector array designed for cosmic-ray composition studies around the knee energy (or ∼ 1 - 10 PeV). It operates at the shallow depth in the Pyhäsalmi mine, Finland. The array consi…
View article: Measuring the<sup>14</sup>C content in liquid scintillators
Measuring the<sup>14</sup>C content in liquid scintillators Open
We are going to perform a series of measurements where the 14C/12C ratio will be measured from several liquid scintillator samples with a dedicated setup. The setup is designed with the aim of measuring ratios smaller than 10−18. Measureme…
View article: Fast timing and trigger Cherenkov detector for collider experiments
Fast timing and trigger Cherenkov detector for collider experiments Open
Analysis of fast timing and trigger Cherenkov detector’s design for its use in collider experiments is presented. Several specific requirements are taken into account – necessity of the radiator’s placement as close to the beam pipe as pos…