184 citations · 718 across the 30 of their papers we have counts for
30 papers
Compact sub-10 ps Resolution Radio Frequency Photomultiplier Tube
Sergey Abrahamyan, Simon Zhamkochyan, Hasmik Rostomyan +16
Experimental measurements of the radial spreading of photoelectrons emitted from a multi-alkali photocathode in a MCP-based photomultiplier tube have shown that, for photon wavelen…
A Helical-Deflector-Based Radio-Frequency Spiral Scanning System for keV Energy Electrons
Simon Zhamkochyan, Vanik Kakoyan, Vardan Bardakhchyan +21
We present the design, modeling, and experimental validation of a radio-frequency based time-to-position conversion system for keV electrons incorporating a helical deflector opera…
Picosecond Precision Heavy-Ion Detector for Λ Hypernuclei Lifetime Studies
Simon Zhamkochyan, Sergey Abrahamyan, Amur Margaryan +18
In this paper, we present the design and preliminary performance evaluation of a new heavy-ion detector for direct measurements of heavy Λ hypernuclei lifetime. The detector employ…
Picosecond resolution photoelectron emission lifetime detection system
V. Kakoyan, S. Zhamkochyan, S. Abrahamyan +21
This paper describes a new photoelectron emission lifetime detection system. It is based on a recently developed Radio Frequency Timing technique of keV electrons and a 40 MHz, ult…
Measurement of the Parity-Violating Asymmetry in the N to Transition at Low
D. Adhikari, T. Alshayeb, D. Androic +70
We report the measurement of the parity-violating asymmetry in the N to transition via the reaction at two different kinematic points with low f…
The SHMS 11 GeV/c Spectrometer in Hall C at Jefferson Lab
S. Ali, A. Ahmidouch, G. R. Ambrose +72
The Super High Momentum Spectrometer (SHMS) has been built for Hall C at the Thomas Jefferson National Accelerator Facility (Jefferson Lab). With a momentum capability reaching 11…
Advanced Radio Frequency Timing AppaRATus (ARARAT) Technique and Applications
Ani Aprahamian, Amur Margaryan, Vanik Kakoyan +28
The development of the advanced Radio Frequency Timer of electrons is described. It is based on a helical deflector, which performs circular or elliptical sweeps of keV electrons,…
An RF Timer of Electrons and Photons with the Potential to reach Picosecond Precision
Amur Margaryan, Vanik Kakoyan, Simon Zhamkochyan +17
This paper describes a new radio frequency timer of keV energy electrons. It is based on a helical deflector, which performs circular or elliptical sweeps of keV electrons, by mean…
First Determination of the 27Al Neutron Distribution Radius from a Parity-Violating Electron Scattering Measurement
QWeak Collaboration, D. Androic, D. S. Armstrong +91
We report the first measurement of the parity-violating elastic electron scattering asymmetry on 27Al. The 27Al elastic asymmetry is A_PV = 2.16 +- 0.11 (stat) +- 0.16 (syst) ppm,…
Deeply virtual Compton scattering using a positron beam in Hall-C at Jefferson Lab
A. Afanasev, I. Albayrak, S. Ali +71
We propose to use the High Momentum Spectrometer of Hall C combined with the Neutral Particle Spectrometer (NPS) to perform high precision measurements of the Deeply Virtual Compto…
Measurement of the Beam-Normal Single-Spin Asymmetry for Elastic Electron Scattering from C and Al
QWeak Collaboration, D. Androic, D. S. Armstrong +82
We report measurements of the parity-conserving beam-normal single-spin elastic scattering asymmetries on C and Al, obtained with an electron beam polarized tra…
Spectroscopy of hyperlithium by the reaction
T. Gogami, C. Chen, D. Kawama +84
Missing mass spectroscopy with the reaction was performed at Jefferson Laboratory's Hall C for the neutron rich hypernucleus . The ground…
An experimental program with high duty-cycle polarized and unpolarized positron beams at Jefferson Lab
A. Accardi, A. Afanasev, I. Albayrak +227
Positron beams, both polarized and unpolarized, are identified as essential ingredients for the experimental programs at the next generation of lepton accelerators. In the context…
Precision Measurement of the Beam-Normal Single-Spin Asymmetry in Forward-Angle Elastic Electron-Proton Scattering
QWeak collaboration, D. Androic, D. S. Armstrong +92
A beam-normal single-spin asymmetry generated in the scattering of transversely polarized electrons from unpolarized nucleons is an observable related to the imaginary part of the…
Scintillating crystals for the Neutral Particle Spectrometer in Hall C at JLab
T. Horn, V. V. Berdnikov, S. Ali +20
This paper discusses the quality and performance of currently available PbWO crystals of relevance to high-resolution electromagnetic calorimetry, e.g. detectors for the Neutra…
Physics with Positron Beams at Jefferson Lab 12 GeV
A. Afanasev, I. Albayrak, S. Ali +124
Positron beams, both polarized and unpolarized, are identified as essential ingredients for the experimental program at the next generation of lepton accelerators. In the context o…
Precision Measurement of the Weak Charge of the Proton
D. Androic, D. S. Armstrong, A. Asaturyan +96
The fields of particle and nuclear physics have undertaken extensive programs to search for evidence of physics beyond that explained by current theories. The observation of the Hi…
Decay pion spectroscopy: a new approach
A. Margaryan, R. Ajvazyan, N. Grigoryan +12
We propose a new experiment for decay pion spectroscopy of light hypernuclei at electron- and proton-beam facilities, using the recoil distance technique for separation of produced…
High Precision Momentum Calibration of the Magnetic Spectrometers at MAMI for Hypernuclear Binding Energy Determination
A. Margaryan, J. R. M. Annand, P. Achenbach +8
We propose a new method for absolute momentum calibration of magnetic spectrometers used in nuclear physics, using the time-of-flight (TOF), differences of pairs of particles with…
The Aerogel Cherenkov Detector for the SHMS magnetic spectrometer in Hall C at Jefferson Lab
T. Horn, H. Mkrtchyan, S. Ali +16
Hadronic reactions producing strange quarks such as exclusive or semi-inclusive kaon production, play an important role in studies of hadron structure and the dynamics that bind th…
Spectroscopy of the neutron-rich hypernucleus He from electron scattering
T. Gogami, C. Chen, D. Kawama +83
The missing mass spectroscopy of the He hypernucleus was performed, using the LiHe reaction at the Thomas Jefferson National Accelerator Fa…
High Resolution Spectroscopic Study of Be
T. Gogami, C. Chen, D. Kawama +83
Spectroscopy of a Be hypernucleus was carried out at JLab Hall C using the reaction. A new magnetic spectrometer system (SPL+HES+HKS), specifically d…
Search for polarization effects in the antiproton production process
D. Grzonka, K. Kilian, J. Ritman +21
For the production of a polarized antiproton beam various methods have been suggested including the possibility that antiprotons may be produced polarized which will be checked exp…
The Q_weak Experimental Apparatus
Qweak Collaboration, T. Allison, M. Anderson +126
The Jefferson Lab Q_weak experiment determined the weak charge of the proton by measuring the parity-violating elastic scattering asymmetry of longitudinally polarized electrons fr…