Beam dynamics design of the muon linac high-beta section

Kondo, Yasuhiro; Hasegawa, K.; Otani, M.; Mibe, T.; Yoshida, Makoto; Kitamura, R.

doi:10.1088/1742-6596/874/1/012054

Cited by 13 publications

(8 citation statements)

References 6 publications

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“…In the E34 experiment, muons are accelerated up to a kinetic energy of 212 MeV using four types of radiofrequency (rf) linear accelerators (linacs) depending on the beam velocity [9][10][11][12]. We previously demonstrated the first stage of muon acceleration using a prototype radiofrequency quadrupole linac (RFQ), which is the first rf structure with an operation frequency of 324 MHz [13].…”

Section: Introductionmentioning

confidence: 99%

Development of a bunch-width monitor for low-intensity muon beam below a few MeV

Sue

Yotsuzuka

Futatsukawa

et al. 2020

Phys. Rev. Accel. Beams

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A destructive monitor to measure the longitudinal bunch width of a low-energy and low-intensity muon beam was developed. This bunch-width monitor (BWM) employed microchannel plates to detect a single muon with high time resolution. In addition, constant-fraction discriminators were adopted to suppress the time-walk effect. The time resolution was measured to be 65 ps in rms using a picosecond-pulsed laser. This resolution satisfied the requirements of the muon linac of the J-PARC E34 experiment. We measured the bunch width of negative-muonium ions (μ þ e − e −) accelerated with a radio-frequency quadrupole using the BWM. The bunch width was successfully measured to be σ ¼ 0.54 AE 0.11 ns, which is consistent with the simulation.

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Section: Introductionmentioning

confidence: 99%

Development of a bunch-width monitor for low-intensity muon beam below a few MeV

Sue

Yotsuzuka

Futatsukawa

et al. 2020

Phys. Rev. Accel. Beams

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“…DAW-CCLs have advantages over other CCLs, such as a higher shunt impedance and higher coupling between the accelerating and coupling cells. A disk-loaded structure (DLS) traveling-wave linac is used when β is greater than 0.7 (42 MeV) [67]. DLS is classified as a traveling wave accelerator for electrons.…”

Section: Muon Accelerationmentioning

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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“…Figure 4 shows configuration of the muon linac. There are four kinds of the RF acceleration cavity: radio-frequency quadrupole linac (RFQ) [11], inter-digital H-mode drift tube linac (IH-DTL) [12], disk and washer coupled cell linac (DAW CCL) [13], and disk-loaded structure [14].…”

Section: Muon Accelerationmentioning

confidence: 99%

J-PARC E34 g-2/EDM experiment

Otani¹

2018

Proceedings of XIV International Conference on Heavy Quarks and Leptons — PoS(HQL2018)

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The muon anomalous magnetic moment, a µ = (g µ − 2)/2, was measured with a precision of 0.54 ppm at Brookhaven National Laboratory (BNL) around 15 years ago. The measured value differs from the Standard Model (SM) prediction by more than three standard deviations. This may imply existence of new physics beyond SM. The new J-PARC experiment aims to measure a µ and the electric dipole moment (EDM) by a completely different method to that at BNL. In the J-PARC experiment, ultracold muons are stored in a 0.66 m-diameter magnetic field without electric focusing. The ultracold muons are produced by laser-ionising muonium atoms accelerated by the muon-dedicated linear accelerator. This paper reports the current status of each experimental component.

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Beam dynamics design of the muon linac high-beta section

Cited by 13 publications

References 6 publications

Development of a bunch-width monitor for low-intensity muon beam below a few MeV

Development of a bunch-width monitor for low-intensity muon beam below a few MeV

Muon cooling and acceleration

J-PARC E34 g-2/EDM experiment

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