Bulk Micromegas fabrication at JINR Dedovich, D.; Gongadze, A.; Gongadze, L. ...
Journal of instrumentation,
07/2019, Letnik:
14, Številka:
7
Journal Article
Recenzirano
Bulk Micromegas detectors are well known for their good spatial and time resolution, and simplicity of manufacturing and maintenance. They are widely applied in various experiments. Recently, the ...infrastructure for Bulk Micromegas development was established at the Joint Institute for Nuclear Research. The fabrication technology is described in this article, as well as the performance of the first assembled prototype is presented.
At present, there are two Micromegas detector production sites at the Dzhelepov Laboratory of Nuclear Problems, Joint Institute for Nuclear Research (DLNP JINR). The first site provides the ...production and testing of Micromegas chambers for the outer part of the large sectors (LM2) of the New Small Wheels for the ATLAS Muon spectrometer. It will produce and test 64 double-sided readout panels with a surface area of 3 m
2
each and 32 Micromegas chambers based on them. Component materials for all project participants are centrally delivered from CERN. The second site is for a complete production cycle and intended for the research and development of Micromegas detectors with widths reaching 60 cm.
Photons produced in pp interactions at 450 GeV/c were detected by reconstructing the e+e− pairs of photon conversions in a 1 mm thick lead sheet placed in front of the MWPCs of the OMEGA spectrometer ...at CERN. A soft photon signal 4.1±0.8 times the inner bremsstrahlung prediction was observed in the forward rapidity region (yc.m.s.⩾1.2), thus extending the domain of the anomalous soft photon effect seen already in K+p, π+p and π−p interactions.
This paper describes a new portable test bench for the TileCal sub-detector of the ATLAS experiment at CERN. The system is used for the certification and quality checks of the front-end electronics ...drawers. It is designed to be an easily upgradable version of the current 10-year-old system, able to evaluate the new technologies planned for the upgrade as well as provide new functionality to the present system. It will be used during the long shutdown of the LHC in 2013-14 and during future maintenance periods.
FCC Physics Opportunities Altmannshofer, W.; Arsenyev, S. A.; Aune, S. ...
The European physical journal. C, Particles and fields,
2019, Letnik:
79, Številka:
6
Journal Article, Publication
Recenzirano
Odprti dostop
We review the physics opportunities of the Future Circular Collider, covering its e
+
e
-
, pp, ep and heavy ion programmes. We describe the measurement capabilities of each FCC component, addressing ...the study of electroweak, Higgs and strong interactions, the top quark and flavour, as well as phenomena beyond the Standard Model. We highlight the synergy and complementarity of the different colliders, which will contribute to a uniquely coherent and ambitious research programme, providing an unmatchable combination of precision and sensitivity to new physics.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
HE-LHC: The High-Energy Large Hadron Collider Altmannshofer, W.; Arsenyev, S. A.; Azatov, A. ...
The European physical journal. ST, Special topics,
2019, Letnik:
228, Številka:
5
Journal Article
Recenzirano
Odprti dostop
In response to the 2013 Update of the European Strategy for Particle Physics (EPPSU), the Future Circular Collider (FCC) study was launched as a world-wide international collaboration hosted by CERN. ...The FCC study covered an energy-frontier hadron collider (FCC-hh), a highest-luminosity high-energy lepton collider (FCC-ee), the corresponding 100 km tunnel infrastructure, as well as the physics opportunities of these two colliders, and a high-energy LHC, based on FCC-hh technology. This document constitutes the third volume of the FCC Conceptual Design Report, devoted to the hadron collider FCC-hh. It summarizes the FCC-hh physics discovery opportunities, presents the FCC-hh accelerator design, performance reach, and staged operation plan, discusses the underlying technologies, the civil engineering and technical infrastructure, and also sketches a possible implementation. Combining ingredients from the Large Hadron Collider (LHC), the high-luminosity LHC upgrade and adding novel technologies and approaches, the FCC-hh design aims at significantly extending the energy frontier to 100 TeV. Its unprecedented centre-of-mass collision energy will make the FCC-hh a unique instrument to explore physics beyond the Standard Model, offering great direct sensitivity to new physics and discoveries.
A coupled channel analysis of the centrally produced
K
+
K
−and
π
+
π
−final states has been performed in
pp collisions at an incident beam momentum of 450 GeV/c. The pole positions and branching ...ratios to
ππ and
K
K
of the
f
0(980),
f
0(1370),
f
0(1500) and
f
0(1710) have been determined. A systematic study of the production properties of all the resonances observed in the
π
+
π
−and
K
+
K
−channels has been performed.
A prototype of the Micromegas detector with 30 × 30 mm2 active area and the resistive anode was developed and produced at DLNP JINR using a bulk Micromegas technological process and a diamond-like ...carbon resistive layer on a polyimide substrate. The prototype is considered as an option for the future upgrade of the readout chambers for the Time Projection Chamber of the Multi-Purpose Detector experiment at the NICA collider. The performance of the prototype of the Micromegas detector was studied using a 55Fe radioactive source and an Ar:CO2 (90:10) gas mixture. The dependencies of the gas gain and the energy resolution on applied high voltage are obtained. The detector works stably up to the gas gain of 30,000. For the gas gain of 10,000 the resolution for the line 5.9 keV of the 55Fe source is 22%. The robustness of the detector prototype to electric discharges was demonstrated by accumulating about 10,000 discharge events at a gas gain of 40,000 without any visible impact on the operation of the prototype.
The reaction pp -> pf (eta eta) ps has been studied at 450 GeV/c. For the first time a partial wave analysis of the centrally produced eta eta system has been performed. Signals for the f0(1500), ...f0(1710) and f2(2150) are observed and the decay branching fractions of these states are determined.
In this Letter we present additional experimental characteristics of anomalous soft photon radiation observed in π−p interactions at 280 GeV/c in the CERN experiment WA91, together with a ...re-calculated ratio of the observed direct soft photon signal to the expected level of the hadronic inner bremsstrahlung, which is found to be 5.3±1.0. The other presented characteristics, energy dependence and angular distributions of direct soft photons, show the similarity of the observed signal to the expected hadronic bremsstrahlung behaviour.
PDF
