The project of a Multi-TeV Muon Collider represents a unique opportunity to explore the high energy physics frontier and to measure with high precision the Higgs coupling with the other particles of ...the Standard Model as well as the trilinear and quadrilinear Higgs self-coupling, leading to a precise determination of the Higgs potential, in order to confirm the theoretical predictions of the SM and possibly to find evidences for new physics. One of the major challenges for the design and optimization of the technologies suitable for a Muon Collider experiment is represented by the high background induced by the decay of the muons coming from the beam. This contribution present the design of an innovative MPGD-based hadronic calorimeter (HCAL). The detector consists of a sampling calorimeter exploiting the Micro Pattern Gas Detectors (MPGDs) as active layers: MPGDs offer a fast and robust technology for high radiation environments and a high granularity for precise spatial measurements. Moreover, the detector is designed to optimize the jet reconstruction and for background suppression. The calorimeter is simulated using the Geant4 toolkit to support the detector R&D. The detector design and layout optimization supported by the simulation is described.
Remarkable scientific and technological progress during the last years has led to the construction of accelerator based facilities dedicated to hadron therapy. This kind of technology requires ...precise and continuous control of position, intensity and shape of the ions or protons used to irradiate cancers. Patient safety, accelerator operation and dose delivery should be optimized by a real time monitoring of beam intensity and profile before and during the treatment, by using non-destructive, high spatial resolution detectors. The authors have studied, developed and initially tested a beam monitor based on Micro Pattern Gaseous Detectors (MPGDs) called TPC-GEM (TPG) detector, characterized by high spatial resolution and rate capability. Due to the low amount of material in the active volume, it is “not invasive”, therefore the beam characteristics are preserved, so minimizing the uncertainties on beam position, intensity, energy and stability.
Computer simulation could be done as a preliminary step for analyzing the basic characteristics of a detector, and Monte Carlo simulation is one approach that can be established. For a better understanding of the first TPG prototype design, and its further improvements, several Monte Carlo simulations were performed.
The aim of this presentation is to give an overview of the full and specific Monte Carlo simulation framework, including different tools (GEANT4, FLUKA/FLAIR, Garfield++, ANSYS and ROOT), developed in order to study in detail the interaction of a therapeutic proton beam with the detector sensitive volume in a typical hadron therapy environment and the performance of the chamber, especially for the calculation of the primary ionization, charge transport through the amplification stages and signal creation. The results obtained will be presented, as well as the future perspectives.
The proposal to create a Muon Collider with Multi-TeV energy levels presents an unprecedented opportunity for advancing high energy physics research. With this collider, it will be possible to ...accurately measure the Higgs coupling with other Standard Model particles, as well as the trilinear and quadrilinear Higgs self-coupling. By doing so, researchers hope to gain a more precise understanding of the Higgs potential and potentially discover evidence of new physics beyond the Standard Model. However, one of the primary challenges for this project is dealing with the high background radiation caused by decaying muons in the beam. To address this, an innovative hadronic calorimeter has been designed that utilizes Micro Pattern Gas Detectors (MPGDs) as active layers. MPGDs are ideal for high radiation environments and offer high granularity for precise spatial measurements. The calorimeter has been optimized for jet reconstruction and background suppression, and its design and layout have been simulated using the Geant4 toolkit to support detector R&D. This article details the design and optimization of the MPGD-based hadronic calorimeter.
Micro-pattern gaseous detectors (MPGDs) are a promising readout technology for hadronic calorimeters (HCAL) thanks to their good space resolution, longevity and rate capability. We describe the ...development of a HCAL based on MPGDs for an experiment at the proposed Muon Collider. The design of a semi-digital MPGD-HCAL is shown and its performance is calculated with Monte Carlo simulations with high-energy pions, showing an energy resolution down to 8\% for \SI{80}{\giga\eV} pions. We also present the performance of twelve MPGD prototypes with different technologies (MicroMegas, \(\mu\)-RWELL and RPWELL) assembled and operated in test beam first with high-energy muons and later with pions in a hadronic calorimeter prototype of \(\sim1\,\lambda_\text{I}\) length; the detectors have a good response uniformity (lower than 17\%) and space resolution and their performance in the calorimeter shows very good agreement with the Monte Carlo shower calculation.
The Muon Collider is one of the most promising future collider facilities
with the potential to reach multi-TeV center-of-mass energy and high
luminosity. Due to the significant Higgs boson ...production cross section in muon
collisions at these high energies, the collider can be considered a Higgs
factory. It holds the capability to significantly advance our understanding of
the Higgs sector to an unprecedented level of precision. However, the presence
of beam-induced background resulting from the decay of the beam muons poses
unique challenges for detector development and event reconstruction. In this
paper, the prospects for various measurements of the Higgs boson production
cross sections at a $\sqrt{s}=3$ TeV collider are presented using a detailed
detector simulation in a realistic environment. The study demonstrates the
feasibility of achieving high precision measurements of the Higgs boson
production cross sections with the current state-of-the-art detector design. In
addition, the paper discusses the detector requirements necessary for obtaining
such resolutions and for measuring the Higgs trilinear self-coupling.
In this paper we report on the current status of studies on the expected performance for a detector designed to operate in a muon collider environment. Beam-induced backgrounds (BIB) represent the ...main challenge in the design of the detector and the event reconstruction algorithms. The current detector design aims to show that satisfactory performance can be achieved, while further optimizations are expected to significantly improve the overall performance. We present the characterization of the expected beam-induced background, describe the detector design and software used for detailed event simulations taking into account BIB effects. The expected performance of charged-particle reconstruction, jets, electrons, photons and muons is discussed, including an initial study on heavy-flavor jet tagging. A simple method to measure the delivered luminosity is also described. Overall, the proposed design and reconstruction algorithms can successfully reconstruct the high transverse-momentum objects needed to carry out a broad physics program.
Among the post-LHC generation of particle accelerators, the muon collider represents a unique machine with capability to provide very high energy leptonic collisions and to open the path to a vast ...and mostly unexplored physics programme. However, on the experimental side, such great physics potential is accompanied by unprecedented technological challenges, due to the fact that muons are unstable particles. Their decay products interact with the machine elements and produce an intense flux of background particles that eventually reach the detector and may degrade its performance. In this paper, we present technologies that have a potential to match the challenging specifications of a muon collider detector and outline a path forward for the future R&D efforts.
The present generation of Micro-Pattern Gaseous Detectors (MPGDs) are radiation hard detectors, capable of detecting efficiently particle rates of several MHz/cm\(^2\) , while exhibiting good spatial ...resolution (\(\leq\) 50 \(\mu\)m) and modest time resolution of 5-10 ns, which satisfies the current generation of experiments (High Luminosity LHC upgrades of CMS and ATLAS) but it is not sufficient for bunch crossing identification of fast timing systems at FCC- hh. Thanks to the application of thin resistive films such as Diamond-Like Carbon (DLC) a new detector concept was conceived: Fast Timing MPGD (FTM). In the FTM the drift volume of the detector has been divided in several layers each with their own amplification structure. The use of resistive electrodes makes the entire structure transparent for electrical signals. After some first initial encouraging results, progress has been slowed down due to problems with the wet-etching of DLC-coated polyimide foils. To solve these problems a more in-depth knowledge of the internal stress of the DLC together with the DLC-polyimide adhesion is required. We will report on the production of DLC films produced in Italy with Ion Beam Sputtering and Pulsed Laser Deposition, where we are searching to improve the adhesion of the thin DLC films, combined with a very high uniformity of the resistivity values.
The RPC muon trigger electronics of the CMS detector performs a number of tasks: synchronization of detector signals, optical data transmission from the detector to the trigger electronics, pattern ...recognition, muon momentum measurement, selection of track candidates. For the diagnostic purposes, as well as for the calibration and real-time monitoring of the RPC detectors and electronic hardware, a set of flexible diagnostic modules was designed and implemented into the FPGAs on which the trigger electronics is based. These include: multi-channel counters, timing histograms, test pulses, and data spying ("snapshots" of the data stream). Tests results presented in this paper, including test with LHC-like muon beam, illustrate the performance and usefulness of these diagnostic modules.
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