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Boundary Condition
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EGUN: An electron optics and gun design program
EGUN: An electron optics and gun design program,10.2172/6711732,W. B. Herrmannsfeldt
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EGUN: An electron optics and gun design program
(
Citations: 82
)
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W. B. Herrmannsfeldt
The name EGUN has become commonly associated with the program also known as the SLAC Electron Trajectory Program. This document is an updated version of SLAC226, published in 1979. The program itself has had substantial upgrading since then, but only a few new features are of much concern to the user. Most of the improvements are internal and are intended to improve speed or accuracy. EGUN is designed to compute trajectories of
charged particles
in electrostatic and magnetostatic fields, including the effects of
space charge
and selfmagnetic fields. Starting options include Child's Law conditions on cathodes of various shapes, as well as used specified initial conditions. Either rectangular or cylindrical symmetry may be used. In the new jargon, the program is a 21/2 dimension code meaning 2D in all fields and 3D in all particle motion. A Poisson's Equation Solver is used to find the electrostatic fields by using difference equations derived from the boundary conditions. Magnetic fields are to be specified externally, by the user, by using one of several methods including data from another program or arbitrary configurations of coils. This edition of the documentation also covers the program EGN87c, which is a recently developed version of EGUN designed to be used on the newer models of personal computers, small main frames, work stations, etc. The EGN87c program uses the
programming language
C which is very transportable so the program should operate on any system that supports C. Plotting routines for most common PC monitors are included, and the capability to make hard copy plots on dotmatrix printerplotters is provided. 18 refs., 7 figs.
Published in 1988.
DOI:
10.2172/6711732
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Citation Context
(42)
...beam parameters were calculated to be pitch factor α ∼ 2 and electron perpendicular velocity spread of 4% at a beam voltage Vb = 10.1 kV. The pitch factor and the velocity spread were obtained using the code EGUN [
20
]...
Antonio C. Torrezan
,
et al.
Operation of a Continuously FrequencyTunable SecondHarmonic CW 330GH...
...The electron gun geometry is shown in Fig. 2(a), along with equipotential lines and electron trajectories obtained from the code EGUN [
27
] for the gyrotron operating parameters Vb =1 3kV and beam current Ib = 100 mA. Other important beam parameters, namely, the ratio of perpendicular to axial electron velocity known as the pitch factor α and the beam perpendicular velocity spread Δv⊥/v⊥, were also evaluated at the cavity region using EGUN...
Antonio C. Torrezan
,
et al.
ContinuousWave Operation of a FrequencyTunable 460GHz SecondHarmoni...
...3000 h. The perveance of the electron gun is 2.2 μP. Using the Egun code [
7
], the trajectory of the electron beam confined by the focusing system was simulated...
Zhaochuan Zhang
,
et al.
Development of a CBand Klystron With a 360MHz Instantaneous Bandwidth
...The optimization of the MIG geometry is performed by using the commercially available code EGUN [
10
] and the inhouse developed code MIGANS...
...The computer simulation is performed with the commercially available code EGUN [
10
, 12]...
Udaybir Singh
,
et al.
Numerical Simulation of MIG for 42 GHz, 200 kW Gyrotron
...Computer simulations with EGUN [
21
] indicate that the perpendiculartoparallel velocity ratio typically achieved in the experiments is α ≤ 1.2 at an operating voltage Vb ≤ 70 kV. The corresponding axial velocity spread is in the range of 4% to 5%, depending on the beam current...
Jirun Luo
,
et al.
Operation of a Kaband HarmonicMultiplying Gyrotron TravelingWave Tu...
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Citations
(82)
Operation of a Continuously FrequencyTunable SecondHarmonic CW 330GHz Gyrotron for Dynamic Nuclear Polarization
(
Citations: 1
)
Antonio C. Torrezan
,
Michael A. Shapiro
,
Jagadishwar R. Sirigiri
,
Richard J. Temkin
,
Robert G. Griffin
Journal:
IEEE Transactions on Electron Devices  IEEE TRANS ELECTRON DEVICES
, vol. 58, no. 8, pp. 27772783, 2011
Emission Characteristics of Nanosized ScandiaDoped Dispenser Cathodes in Open ElectronGun Structures
Wei Liu
,
Yiman Wang
,
Jinshu Wang
,
Yanchun Wang
,
Bernard Vancil
Journal:
IEEE Transactions on Electron Devices  IEEE TRANS ELECTRON DEVICES
, vol. 58, no. 4, pp. 12411246, 2011
Note: Design of transverse electron gun for electron beam based reactive evaporation system
Namita Maiti
,
U. D. Barve
,
M. S. Bhatia
,
A. K. Das
Published in 2011.
ContinuousWave Operation of a FrequencyTunable 460GHz SecondHarmonic Gyrotron for Enhanced Nuclear Magnetic Resonance
(
Citations: 7
)
Antonio C. Torrezan
,
SeongTae Han
,
Ivan Mastovsky
,
Michael A. Shapiro
,
Jagadishwar R. Sirigiri
,
Richard J. Temkin
,
Alexander B. Barnes
,
Robert G. Griffin
Journal:
IEEE Transactions on Plasma Science  IEEE TRANS PLASMA SCI
, vol. 38, no. 6, pp. 11501159, 2010
Design of Beam Tunnel for 42 GHz, 200 kW Gyrotron
(
Citations: 2
)
Nitin Kumar
,
Mukesh K. Alaria
,
Udaybir Singh
,
A. Bera
,
T. P. Singh
,
A. K. Sinha
Journal:
Journal of Infrared Millimeter and Terahertz Waves  J INFRARED MILLIM TERAHERTZ W
, vol. 31, no. 5, pp. 601607, 2010