Frictional cooling: Latest experimental results

Mühlbauer, M.; Brunnhuber, A.; Daniel, H.; Hartmann, F. J.; Hauser, Peter C.; Kottmann, F.; Maierl, Ch.; Petitjean, C.; Schott, W.; Taqqu, D.; Wojciechowski, Piotr

doi:10.1007/bf02227673

Cited by 12 publications

(5 citation statements)

References 7 publications

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“…In each case, the time required to cool the beam is long compared to the muon lifetime. Frictional cooling of muons, in which muons are electrostatically accelerated through an energyabsorbing medium at energies significantly below 1 MeV, has been demonstrated but with low efficiency [24][25][26] .…”

Section: High-quality Muon Beamsmentioning

confidence: 99%

Demonstration of cooling by the Muon Ionization Cooling Experiment

Bogomilov

Filthaut

Heidt

2020

Nature

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Section: High-quality Muon Beamsmentioning

confidence: 99%

Demonstration of cooling by the Muon Ionization Cooling Experiment

Bogomilov

Filthaut

Heidt

2020

Nature

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“…Considerable research and progress is under way in that area which has been pioneered in frictional cooling studies [72]. A completely new phase space compression scheme was proposed by Taqqu [73] and is in a feasibility study at PSI [74].…”

Section: New High Quality Muon Beamsmentioning

confidence: 99%

The Virtue of Precision Particle Physics

Kirch

2015

Proceedings of the 2nd International Symposium on Science at J-Parc — Unlocking the Mysteries of Life, Matter and the Universe

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Precision studies and tests of fundamental interactions and symmetries are a focus point of modern particle physics. With the success of the present Standard Model (SM) of particle physics and simultaneously with the need for new physics to fix known deficiencies a broad search program is under way to probe at all energy scales for the unknown. Precision measurements of quantities which can be accurately predicted in the SM and also especially those which are predicted to be null or negligibly small turn out to provide some of the most stringent constraints for many new physics scenarios. Besides some detours, this paper concentrates on precision physics using neutrons, pions and muons, the lightest unstable particles of their kind, produced at the most powerful proton accelerators.KEYWORDS: precision particle physics, symmetry, lepton flavor, charge parity, dipole moment, weak interaction, rare decay, exotic atom, spectroscopy Setting the sceneComplementarity is a buzz word in today's research. Here it is used to describe the relation between the direct production of new particles and observations of virtual contributions from such particles. Direct production of new heavy particles and resonances and their detection through their decays is the realm of high energy collider particle physics. The recent discovery of a Higgs boson [1,2] displaying so far all features expected for the Standard Model (SM) Higgs is the latest discovery and triumph of this successful line of research. Indeed, the careful investigation of this Higg's particle properties (see, e.g. [3]) and the continued search for possible new particles with larger masses is the ongoing high priority program at CERN's LHC which will resume operation at higher energy soon.The broader look at 'fundamental physics in the era of LHC' has identified many complementary efforts and established the case and the need for a program at the high intensity, low energy, precision physics frontier, e.g. [4][5][6]. The observation of indirect, short distance effects of virtual particles becomes possible in the comparison of precision measurements and precision theoretical predictions. As it turns out, many of these experiments at low energy probe physics at considerably higher energy scale than direct collider searches, often multi-TeV or even 1000 TeV.Some finite observables allow, both, very precise and accurate experimental determinations and very precise and accurate, often multi-loop, calculations within the SM or some of its extensions. Prime examples for these observables are the anomalous magnetic moments a e/µ = (g − 2)/2 of the electron [7] and the muon [8,9]. For instance, the best determination today of the fine structure constant α relies on the a e measurement and a high precision QED calculation [10]. Likewise, the electron mass [11] is obtained by comparing a high precision quantum jump spectroscopy measurement in a Penning trap with a high precision calculation of the bound electron g-factor. More examples can be easily found, as the extraction of fu...

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“…Frictional cooling is the bringing of charged particles to an equilibrium energy by the balancing of energy loss to a material with energy gain from an electric field [6]. Figure 1 shows the stopping power, 1 ρ dT ds , as a function of kinetic energy T for µ + , where ρ is the density of the medium and dT ds is the energy T eq is the equilibrium energy.…”

Section: Frictional Coolingmentioning

confidence: 99%

“…One way to achieve this is using a series of thin foils with an electric field present between them, as was used by a previous experiment at PSI [6]. Although the average density is low, the density in the foils is large, so the lower-energy particles have a significant probability to stop and decay.…”

Section: Frictional Coolingmentioning

confidence: 99%

Low-energy muons via frictional cooling

Bao,

Caldwell,

Greenwald

et al. 2010

Preprint

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Low-energy muon beams are useful for a range of physics experiments. We consider the production of low-energy µ + beams with small energy spreads using frictional cooling. As the input beam, we take a surface muon source such as that at the Paul Scherrer Institute. Simulations show that the efficiency of low energy µ + production can potentially be raised to 1%, which is significantly higher than that of current schemes.

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Frictional cooling: Latest experimental results

Cited by 12 publications

References 7 publications

Demonstration of cooling by the Muon Ionization Cooling Experiment

Demonstration of cooling by the Muon Ionization Cooling Experiment

The Virtue of Precision Particle Physics

Low-energy muons via frictional cooling

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