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Thursday, July 23, 2020 | History

2 edition of Measurement of current in pulsed electron beams found in the catalog.

Measurement of current in pulsed electron beams

by Steven Nicholas Anastasion

  • 199 Want to read
  • 9 Currently reading

Published by Massachusetts Institute of Technology .
Written in English

    Subjects:
  • Electronics

  • Edition Notes

    Statementby Steven N. Anastasion and Donald W. Sencebaugh
    ContributionsSencebaugh, Donald W.
    ID Numbers
    Open LibraryOL24776135M

    Ultrawideband current sensor based on the Faraday effect in semimagnetic semiconductors. Pulsed electron beams for flue-gas treatment. The e-SCRUB Machine: an kV, kW average power pulsed electron beam generator for flue-gas scrubbing. IAEA Radiation Oncology Physics: A Handbook for Teachers and Students - Slide 1 CHAPTER 8. TABLE OF CONTENTS Central axis depth dose distributions in water Dosimetric parameters of electron beams Clinical considerations in electron beam therapy.

    This book (Practical Electron Microscopy and Database) is a reference for TEM and SEM students, operators, engineers, technicians, managers, and researchers. The probe current depends on the source brightness β, the demagnified . 10 Pulsed Voltage and Current Measurements Pulsed Voltage Measurement Spark Gaps Crest Voltmeters Voltage Dividers Electro-optical Techniques Reflection Attenuator Pulsed Current Measurement Current Viewing Resistor Rogowski Coil

    2 The measurement of the both parameters, that are the magnetic field induction B and laser beam frequency ω L, with accuracy of the order of. Ultrafast pulse radiolysis with a short-pulsed electron beam and a short-pulsed analyzing light is a powerful time-resolved spectroscopic technique to study the kinetics and reactions of short-lived intermediate species or precursors in radiation chemistry and biology. In this chapter, first, we give an overview of historical developments of ultrafast pulse : Takafumi Kondoh, Jinfeng Yang, Koichi Kan, Masao Gohdo, Hiromi Shibata, Yoichi Yoshida.


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Measurement of current in pulsed electron beams by Steven Nicholas Anastasion Download PDF EPUB FB2

Pulsed Voltage and Current Measurements is described for rise time and current of intense electron beams. The probe rise time is lower than 1 ns.

We report the generation of high-current-density (20 A/cm2) pulsed electron beams from high-voltage ( kV) glow discharges using cathodes cm in diameter.

Experimental Investigations of High Voltage Pulsed Pseudospark Discharge and Intense Electron Beams Hu, Jing1 and Joshua L. Rovey2 Missouri University of Science & Technology, Rolla, Missouri A high voltage pulsed discharge device which can produce intense high energy electron beam named “pseudospark” is presented in this work.

Electron-beam-induced current (EBIC) is a semiconductor analysis technique performed in a scanning electron microscope (SEM) or scanning transmission electron microscope (STEM).

It is used to identify buried junctions or defects in semiconductors, or to examine minority carrier properties. EBIC is similar to cathodoluminescence in that it depends on the creation of. Thirteen Faraday cups were fitted into a common housing to measure current distribution as a function of time, position, and drift tube pressures of the electron beam emitted by the 45 kA electron beam accelerator at the Sandia Laboratories.

Description of the instrument design and the electronic configurations are given along with some examples of signals generated in Cited by: 5. Abstract. Carrier mobilities of several polymers were studied by the time of flight method using a pulsed electron beam.

The obtained mobilities at the field of 1 MV/cm were × 10 −5 cm 2 /Vsec for electron and × 10 −4 cm 2 /Vsec for hole in PET, × 10 −4 cm 2 /v sec for electron and 7 × 10 −5 cm 2 /Vsec for hole in PS, and × 10 −4 cm 2 /Vsec for electron and Cited by: 2. Progress in plasma focus research at the Kurchatov Institute Krauz, V., Myalton, V., Vinogradov, V., Velikhov, E., Ananyev, S., Vinogradova, Y., Dan'Ko, S., Kalinin.

High-current pulsed electron beams (HCPEB) irradiation is a new potential method to polish hard steels and alloys. After HCPEB machining, the performance of machined surface, such as corrosion resistance and microstructure, has been greatly improved.

Because of its good performance, HCPEB irradiation is playing more and more important roles in polishing hard Cited by: 2. The problem consists in the measurements of absorbed dose during irradiation of product.

The other problem is time characteristics of dose sensor. It is critical for short-pulsed electron beams and related to pulsed nanosecond electron accelerators. The search of new approaches for solution of RT monitoring of absorbed dose is very by: 3. stabilization of the current is limited within 10 mA, which denotes a fluctuation of the magnetic field less than 5 Gs during the measurement.

Fig. 2 Experimental setup for energy-spread measurement. Experiments are carried out on the Dragon-II LIA for the energy-spread measurement of the electron : Yi Wang, Qin Li, Zhiyong Yang, Huang Zhang, Hengsong Ding, Anmin Yang, Minhong Wang. ELSEVIER Nuclear Instruments and Methods in Physics Research A () NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH Section A Measurement of the polarization of a pulsed electron beam with a Moller polarimeter in the coincidence mode K.B.

Beard a,b, R. Madey a,e, *, W.-M. Zhang c, D.M. Manley e, B.D. Anderson c, A.R. Baldwin c, Cited by: 7. Pulsed electron beams are generated by discharging the capacitor C (C = nF or 3 nF) between the cathode and the grounded anode, through the resistance R3 (R3 = Ω), by means of a rotary spark-gap (RSG).

The electrical circuit is illustrated in Fig. The electron beam current was measured by means of a shunt resistance (Rsh)File Size: KB.

Electron beams in plasmas Charged Particle Beams 12 Electron Beams in Plasmas _____ We have looked briefly at plasma properties several times in previous chapters. In this chapter, we shall initiate a more detailed study of plasmas with emphasis on their response to pulsed high-current electron Size: 2MB.

Static and Pulsed IV Waveforms Measurement of the static and pulsed IV waveforms of a DIVA model D was performed by con-necting the channels of an oscillo-scope to the gate and drain channels of the instrument. Manufacturer specifications for the D model are shown in Table 1, showing the avail-able range of measurement Size: KB.

The theoretical model for investigation of the electron beam propagation in the gas medium is developed. The main feature of the model is the possible to analyze the time evolution of the differential current which allows obtaining the energy distribution function of electron.

The equations for electromagnetic fields created by the electron beam are the time dependence Author: Nurken E.

Aktaev, Alexander Y. Pak. a pulsed electron beam current and ux monitor along-with electronic system for an electron accelerator called Race-Track Microtron has been designed and developed.

The sensing device used was a ferrite core having suitable number of turns of copper wire wound around it, through which the electron beam was passed without loss in the Size: 6MB. @article{osti_, title = {Measurement and interpretation of electron angle at MABE beam stop}, author = {Sanford, T W.L.

and Coleman, P D and Poukey, J W}, abstractNote = {This analysis shows that radiation measurements combined with a sophisticated simulation provides a simple but powerful tool for estimating beam temperature in intense pulsed annular electron.

In water, C1 = MeV, C2 = -1, and C3 = R p is the practical range of electrons, given by the intersection of an imaginary line drawn through the linear part of the depth dose curve would intersect the depth axis.

Mean Energy. An alternate method of describing an electron beam is that the mean energy of the electron beam at the phantom. An ultrafast electron microscope (UEM) with a femtosecond temporal resolution is a “dream machine” desired for studies of ultrafast structural dynamics in materials.

In this chapter, we present a brief overview of the historical development of current UEMs with nonrelativistic electron pulses to illustrate the need for relativistic-energy electron by: 4. 60 kV dc power supply. Pulsed current integrators are used to measure the pulsed beam currents before and after the accelerator.

Synchronization of these three elements in the pulsed measurement system is accom- plished by the beam sequencer unit which generates all the related timing signals [4]. Abstract. Measuring magnetic field and current distribution in Z-pinch plasma systems is crucial to the validation of Z-pinch theory.

In this letter, the demonstration of proton deflectometry to pulsed-power-driven loads at the mega-amp scale is presented, which is capable of making more detailed field maps in high-density regions of plasmas. The technique was tested at different pulsed ion accelerators and ion diodes both with self-magnetic insulation (accelerating voltage of – kV, ion current density of 20– A/cm 2) and external magnetic insulation of the electrons (– kV, A/cm 2).

The article presents a comparative analysis of two types of Faraday cups with Cited by: 5.The “Nadezhda-2” electron-beam source can produce electron beams with the parameters as follows: electron energy 10–40 keV, peak current 10 2 –10 3 A/cm 2, pulse duration –5 μs, energy density –40 J/cm 2, beam cross-section area 10–50 cm 2, and repeating pulse interval 10 s.

The electron beam is generated by an explosive Cited by: