A radio frequency helical deflector for keV electrons

Gevorgian, Lekdar; Ajvazyan, R.; Kakoyan, V.; Margaryan, A.; Annand, J. R. M.

doi:10.1016/j.nima.2015.03.012

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…This consisted of an MCP system, where the electrons are multiplied by a factor of 10 6 , (11) and a DLD40 [4] delay-line (DL) anode ( 12), producing position-sensitive signals with rise times of a few ns. On their way to the PSD, the electrons pass through a helical RF deflector (10) based on half period helical electrodes and a 500-1000 MHz RF source [5]. Pulses are analyzed by the data acquisition system consisting of a digital scope (such as SAMPIC [6] or Picoscope [7]) and a PC.…”

Section: The Rf Timermentioning

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: The Rf Timermentioning

confidence: 99%

Advanced picosecond precision Radio Frequency Timer

Zhamkochyan,

Kakoyan,

Abrahamyan

et al. 2024

J. Inst.

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“…The RF deflector consists of a pair of helical deflection electrodes [19]. These electrodes form a wire cavity with a quality factor Q ≥ 100.…”

Section: The Rf Deflector and Anode Readout Architecturementioning

confidence: 99%

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

Margaryan

Annand

Achenbach

et al. 2017

Nuclear Instruments and Methods in Physics Research Section A:

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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 different masses. In cases where the flight path is not known, a calibration can be determined by using the TOF differences of two pair combinations of three particles. A Cherenkov detector, read out by a radio frequency photomultiplier tube, is considered as the high-resolution and highly stable TOF detector. By means of Monte Carlo simulations it is 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.

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“…Шамаевым (см [4]). Поле внутри ДСЛ генерируется высокочастотным квазистационарным синусоидальным напряжением и считается, что в приосевой области электроны взаимодействуют с поперечным циркулярно-поляризованным электрическим полем [5,6].…”

Section: Introductionunclassified

Магнитное Поле Внутри Двухпроводной Спиральной Линии

Gevorgian¹

2022

Proceedings of NAS RA. Physics

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Обтекаемая постоянным током петля, образованная двумя диаметрально противоположными спиралями из линейного или ленточного провода, является дефлектором для нерелятивистских, и спиральным ондулятором для релятивистских электронов. В данной работе получены аналитические выражения для трех компонент магнитной индукции внутри двухпроводной спиральной линии (ДСЛ), которые существенно отличаются от аналогичных выражений, используемых в научных работах. В частности, в приосевой области, где происходит взаимодействие электронов с магнитным полем, радиальная компонента магнитной индукции не возрастающая функция от радиальной координаты, а убывающая. Этот результат важен, поскольку для описания физических характеристик лазера на свободных электронах или дефлектора требуется учет точных траекторий электронов сгустка. Полученные правильные формулы для потенциала магнитного поля и компонент магнитной индукции необходимы и для определения значений резонансных частот электромагнитных волн, возбуждаемых квазистационарным синусоидальным напряжением внутри ДСЛ.

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A radio frequency helical deflector for keV electrons

Cited by 5 publications

References 12 publications

Advanced picosecond precision Radio Frequency Timer

Advanced picosecond precision Radio Frequency Timer

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

Магнитное Поле Внутри Двухпроводной Спиральной Линии

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