High precision momentum calibration of the magnetic spectrometers at MAMI for hypernuclear binding energy determination

Margaryan, A.; Annand, J. R. M.; Achenbach, P.; Ajvazyan, R.; Elbakyan, Hayk; Montgomery, R. A.; Nakamura, S. N.; Pochodzalla, J.; Schulz, Florian; Toyama, Yuichi; Zhamkochyan, S.

doi:10.1016/j.nima.2016.09.051

Cited by 3 publications

(4 citation statements)

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“…A Cherenkov detector, read out by a RFPMT, was considered as the high-resolution and highly stable TOF detector. By means of Monte Carlo simulations it was demonstrated that the magnetic spectrometers at the MAMI electron-scattering facility can be calibrated absolutely with an accuracy 𝛿 𝑝/𝑝 ≤ 10 −4 , which will be crucial for high precision determination of binding energies of the Λ particle in the nuclear ground state [21].…”

Section: Rft and Rfpmt: Applications In Nuclear Physicsmentioning

confidence: 99%

Advanced picosecond precision Radio Frequency Timer

Zhamkochyan,

Kakoyan,

Abrahamyan

et al. 2024

J. Inst.

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A new type of radio frequency (RF) timing technique is presented. It is based on a helical deflector, which performs circular or elliptical sweeps of photo- or secondary electrons, accelerated to keV energies, by means of RF fields in the 500–1000 MHz range. By converting a time distribution of the electrons to a hit position distribution on a circle or ellipse, this device achieves extremely precise timing, similar to streak cameras. Detection of the scanned electrons, using a position sensitive detector based on microchannel plates and a delay line anode, resulted in a timing resolution of 10 ps, which can be potentially improved to 1 ps. RF-Timer-based single photon and heavy ion detectors have potential applications in different fields of science and industry, which include high energy nuclear physics and imaging technologies. This technique could play a crucial role in developing of sub 10 ps Time-of-Flight Positron Emission Tomography.

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Section: Rft and Rfpmt: Applications In Nuclear Physicsmentioning

confidence: 99%

Advanced picosecond precision Radio Frequency Timer

Zhamkochyan,

Kakoyan,

Abrahamyan

et al. 2024

J. Inst.

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“…1. The tracking detector package of 𝐻𝜋𝑆 is the same as before, but an ultra-high precision timing detector, based on Cherenkov radiators coupled to Radio Frequency Photomultiplier Tubes (RF PMT) [15] will be added. The expected time resolution of such detectors is better than 10 ps, FWHM.…”

Section: Decay Pion Spectroscopy Of the λ-Hypernuclei: A New Approachmentioning

confidence: 99%

Section: Decay Pion Spectroscopy Of the λ-Hypernuclei: A New Approachmentioning

confidence: 99%

“…The RF PMT-Cherenkov detector will also provide an absolute momentum calibration of the 𝐻𝜋𝑆 by measuring the time-of-flight (TOF) differences of pairs of particles with different masses [15]. Monte Carlo simulations demonstrated that the magnetic spectrometers at the MAMI electron-scattering facility can be calibrated absolutely with an accuracy δp/ p ≤ 10 −4 , which will be crucial for high precision determination of hypernuclear masses [15]. In addition by measuring lifetimes of the low lying hypernuclear states and by applying the "tagged-weak 𝜋 − method" [16], the electromagnetic excitation rates of such states with lifetimes down to ≅ 10 −11 s could be investigated, which is another avenue for hypernuclear studies.…”

Section: Decay Pion Spectroscopy Of the λ-Hypernuclei: A New Approachmentioning

confidence: 99%

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Decay pion spectroscopy: A new approach

Margaryan

Ajvazyan

Grigoryan

et al. 2019

Nuclear Instruments and Methods in Physics Research Section A:

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We propose a new experiment for decay pion spectroscopy of light hypernuclei at electronand proton-beam facilities, using the recoil distance technique for separation of produced hypernuclei and a magnetic spectrometer for precise measurement of the decay pion momentum.Low-pressure MWPCs are advocated for low-energy recoil detection as they provide position and time information and are highly insensitive to gamma-ray and electron background. The position and timing characteristics of such a recoil detector were studied using ~5 MeV αparticles. By using the present proposed approach the rate of the detected hypernuclei can be increased by one-to-two orders of magnitude compared to a recent experiment carried out at the MAMI electron accelerator in Mainz. The possibility of realizing a high luminosity decay pion spectroscopy experiment with proton beams is also discussed.

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