231 citations · 1.2k across the 50 of their papers we have counts for
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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…
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,…
Technique for the measurement of intrinsic pulse-shape discrimination for organic scintillators using tagged neutrons
N. Mauritzson, K. G. Fissum, J. R. M. Annand +10
Fast-neutron/gamma-ray pulse-shape discrimination has been performed for the organic liquid scintillators NE 213A and EJ 305 using a time-of-flight based neutron-tagging technique…
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…
Geant4-based calibration of an organic liquid scintillator
N. Mauritzson, K. G. Fissum, H. Perrey +8
A light-yield calibration of an NE 213A organic liquid scintillator detector has been performed using both monoenergetic and polyenergetic gamma-ray sources. Scintillation light wa…
A comparison of untagged gamma-ray and tagged-neutron yields from 241AmBe and 238PuBe sources
Julius Scherzinger, Ramsey Al Jebali, John Annand +7
Untagged gamma-ray and tagged-neutron yields from 241AmBe and 238PuBe mixed-field sources have been measured. Gamma-ray spectroscopy measurements from 1 - 5 MeV were performed in a…
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 light-yield response of a NE-213 liquid-scintillator detector measured using 2 -- 6 MeV tagged neutrons
J. Scherzinger, R. Al Jebali, J. R. M. Annand +8
The response of a NE-213 liquid-scintillator detector has been measured using tagged neutrons from 2--6 MeV originating from an Am/Be neutron source. The neutron energies were dete…
Tagging fast neutrons from an 241Am/9Be source
J. Scherzinger, J. R. M. Annand, G. Davatz +10
We report on an investigation of the fast-neutron spectrum emitted by 241Am/9Be. Well-understood shielding, coincidence, and time-of-flight measurement techniques are employed to p…
Tests of the Monte Carlo Simulation of the Photon-Tagger Focal-Plane Electronics at the MAX IV Laboratory
M. F. Preston, L. S. Myers, J. R. M. Annand +5
Rate-dependent effects in the electronics used to instrument the tagger focal plane at the MAX IV Laboratory were recently investigated using the novel approach of Monte Carlo simu…
An Electromagnetic Calorimeter for the JLab Real Compton Scattering Experiment
D. J. Hamilton, A. Shahinyan, B. Wojtsekhowski +26
A lead-glass hodoscope calorimeter that was constructed for use in the Jefferson Lab Real Compton Scattering experiment is described. The detector provides a measurement of the coo…