Demonstration of Muon-Beam Transverse Phase-Space Compression

Antognini, Aldo; Ayres, N. J.; Belošević, Ivana; Бондар, В. М.; Eggenberger, Andreas; Hildebrandt, M.; Iwai, R.; Kaplan, Daniel M.; Khaw, Kim Siang; Kirch, K.; Knecht, A.; Papa, A.; Petitjean, C.; Phillips, T. J.; Piegsa, F. M.; Ritjoho, N.; Stoykov, A.; Taqqu, D.; Wichmann, Gunther

doi:10.1103/physrevlett.125.164802

Cited by 21 publications

(15 citation statements)

References 21 publications

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“…To study the µ + motion, a system of plastic scintillators detecting the positrons from muon decay was placed around the target. The recorded time spectra (see Figure 30.2 (right)) of these detectors were compared to simulations and good agreement was found [8,9].…”

Section: Demonstration Of Transverse and Longitudinal Compressionmentioning

confidence: 74%

“…To demonstrate transverse compression, a cryogenic target as sketched in Figure 30.2 (left) was constructed, capable of sustaining the needed temperature gradient in vertical direction [8]. The target walls were lined with conducting tracks held at high voltage to define a homogeneous electric field at 45 • angle w.r.t.…”

Section: Demonstration Of Transverse and Longitudinal Compressionmentioning

confidence: 99%

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muCool: muon cooling for high-brightness μ+ beams

Antognini

Taqqu

2021

SciPost Phys. Proc.

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A number of experiments with muons are limited by the poor phase space quality of the muon beams currently available. The muCool project aims at developing a phase-space cooling method to transform a surface \mu^+μ+ beam with 4 MeV energy and 1 cm size into a slow muon beam with eV energy and 1 mm size. In this process the phase space is reduced by a factor of 10^{9}-10^{10}109−1010 with efficiencies of 2\cdot 10^{-5}-2\cdot 10^{-4}2⋅10−5−2⋅10−4. The beam is then re-accelerated to keV-MeV energies. Such a beam opens up new avenues for research in fundamental particle physics with muons and muonium atoms as well as in the field of \muμSR spectroscopy.

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Section: Demonstration Of Transverse and Longitudinal Compressionmentioning

confidence: 74%

Section: Demonstration Of Transverse and Longitudinal Compressionmentioning

confidence: 99%

muCool: muon cooling for high-brightness μ+ beams

Antognini

Taqqu

2021

SciPost Phys. Proc.

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“…The development of muCool [16] and the high intensity Muon Beam (HiMB) [44] will further increase the available statistics by orders of magnitude. This will help to implement more systematically robust measurement schemes, such as the employment of an enhancement cavity with a larger laser beam to reduce AC-stark shift in the 1S-2S measurement and the use of variations of Ramsey-spectroscopy to measure the Lamb shift.…”

Section: Discussionmentioning

confidence: 99%

“…It is apparent that our lack of an independent, accurate determination of m µ is limiting the ability to test QED. This is especially true considering ongoing efforts to improve both experimental and theoretical errors on the M hyperfine splitting below 10 Hz [14,16]. The Mu-MASS experiment is the measurement of the 1S-2S transition in M to the few ppt level.…”

Section: 2mentioning

confidence: 99%

Current status and prospects of muonium spectroscopy at PSI

Ohayon

Burkley

2021

SciPost Phys. Proc.

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Recent and ongoing developments of low energy muon beamlines are heralding a new era of precision Muonium spectroscopy. While past spectroscopic measurements of Muonium were performed at pulsed muon facilities and were statistically limited, the advent of continuous low energy muon beams, such as at the LEM beamline at PSI, paired with the development of efficient muon-muonium converters and laser advancements, will overcome these limitations. Current experiments presently underway at the LEM facility and in the near future at the muCool beamline, which is under development at PSI, aim to improve the precision of both the 1S-2S transition determination and Lamb shift by several orders of magnitude. In this Chapter we give an overview of the current status and future prospects of these activities at PSI, highlighting how their projected significance fits into a broader context of other ongoing efforts worldwide.

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“…The decelerated muons are transported with electric and magnetic fields in combination with gas density gradients, and ∼ 10 eV muons are obtained. Recently, the muCool collaboration succeeded in demonstrating transverse compression and improving the phase-space density by a factor of 10 10 with 10 −3 efficiency [34].…”

Section: Muon Coolingmentioning

confidence: 99%

Muon cooling and acceleration

Otani

2022

AAPPS Bull.

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Muons, which were discovered in the 1930s and first generated using an accelerator half a century after their discovery, are now widely used in several scientific fields such as particle physics and material science. Recent advancements in cooling techniques have reduced the phase-space volume of muon beams and driven the effort to realize muon acceleration, which has now been demonstrated for the first time. This paper reviews the current state of muon cooling and acceleration technologies.

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Demonstration of Muon-Beam Transverse Phase-Space Compression

Cited by 21 publications

References 21 publications

muCool: muon cooling for high-brightness μ+ beams

muCool: muon cooling for high-brightness μ+ beams

Current status and prospects of muonium spectroscopy at PSI

Muon cooling and acceleration

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