Stability of electron beam parameters in sources with cold secondary-emission cathodes

2004 ◽  
Author(s):  
A.N. Dovbnya ◽  
N.I. Aizatsky ◽  
V.N. Boriskin ◽  
V.V. Zakutin ◽  
V.A. Kushnir ◽  
...  
Keyword(s):  
Electron Beam ◽  
Secondary Emission ◽  
Beam Parameters

Inquiry into the Processes of Electron Beam Generation in a Magnetron Gun with Secondary-Emission Cathode

1999 ◽  
Vol 53 (4-5) ◽  
pp. 144-149
Author(s):  
N. I. Ayzatsky ◽  
A. N. Dovbnya ◽  
V. V. Zakutin ◽  
N. G. Reshetnyak ◽  
V. P. Romas'ko ◽  
...  
Keyword(s):  
Electron Beam ◽  
Secondary Emission ◽  
Electron Beam Generation ◽  
Beam Generation ◽  
Emission Cathode

Investigation of scanning electron beam parameters in terms of the disk-charged approximation for the sample potential

Optik ◽  
2016 ◽  
Vol 127 (17) ◽  
pp. 6978-6981 ◽  
Author(s):  
Hassan N. Al-Obaidi ◽  
Musatfa M. Abid ◽  
Wasan J. Kadhem
Keyword(s):  
Electron Beam ◽  
Scanning Electron Beam ◽  
Beam Parameters ◽  
Scanning Electron

scholarly journals Skew Quadrupole Effect of Laser Plasma Electron Beam Transport

2019 ◽  
Vol 9 (12) ◽  
pp. 2447 ◽  
Author(s):  
Driss Oumbarek Espinos ◽  
Amin Ghaith ◽  
Thomas André ◽  
Charles Kitégi ◽  
Mourad Sebdaoui ◽  
...  
Keyword(s):  
Electron Beam ◽  
Laser Plasma ◽  
Free Electron ◽  
Free Electron Laser ◽  
Plasma Electron ◽  
Beam Transport ◽  
Emittance Growth ◽  
Quadrupole Effect ◽  
Beam Parameters ◽  
Electron Beam Transport

Laser plasma acceleration (LPA) capable of providing femtosecond and GeV electron beams in cm scale distances brings a high interest for different applications, such as free electron laser and future colliders. Nevertheless, LPA high divergence and energy spread require an initial strong focus to mitigate the chromatic effects. The reliability, in particular with the pointing fluctuations, sets a real challenge for the control of the dispersion along the electron beam transport. We examine here how the magnetic defects of the first strong quadrupoles, in particular, the skew terms, can affect the brightness of the transported electron beam, in the case of the COXINEL transport line, designed for manipulating the electron beam properties for a free electron laser application. We also show that the higher the initial beam divergence, the larger the degradation. Experimentally, after having implemented a beam pointing alignment compensation method enabling us to adjust the position and dispersion independently, we demonstrate that the presence of non-negligible skew quadrupolar components induces a transversal spread and tilt of the beam, leading to an emittance growth and brightness reduction. We are able to reproduce the measurements with beam transport simulations using the measured electron beam parameters.

Design and sensitivity of a secondary emission monitor of accelerated electron beam position

1972 ◽  
Vol 101 (2) ◽  
pp. 275-277
Author(s):  
I.A. Prudnikov ◽  
A.S. Toropov ◽  
Yu.F. Chichikalov
Keyword(s):  
Electron Beam ◽  
Secondary Emission ◽  
Beam Position

Characteristics of Electron Beam Produced by Magnetron Diode with a Secondary-Emission Cathode

2006 ◽  
Author(s):  
N.I. Ayzatskiy ◽  
A.N. Dovbnya ◽  
N.A. Dovbnya ◽  
V.V. Mytrochenko ◽  
N.G. Reshetnyak ◽  
...  
Keyword(s):  
Electron Beam ◽  
Secondary Emission ◽  
Magnetron Diode ◽  
Emission Cathode

Observations of low-frequency oscillations during relativistic-electron-beam-plasma interactions

1991 ◽  
Vol 46 (2) ◽  
pp. 237-246
Author(s):  
A. S. Paithankar ◽  
G. P. Gupta
Keyword(s):  
Electron Beam ◽  
Relativistic Electron ◽  
Relativistic Electron Beam ◽  
Low Frequency ◽  
Hydrogen Gas ◽  
The Novel ◽  
Low Frequency Oscillations ◽  
Wave Forms ◽  
Beam Parameters ◽  
Pressure Regime

During propagation of a relativistic electron beam in hydrogen gas at sub-torr pressures using a foil-less diode, low-frequency oscillations in the megahertz range are observed in the net current wave forms, and continue even after passage of the beam. The novel feature of the experiment is that both beam generation and propagation take place in the same low-pressure regime, and hence the beam parameters are functions of gas pressures. Analysis of the experimental results shows that the low-frequency oscillations result from the resistive-hose instability.

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