Design and Simulation of Solenoid for Buncher of a Linear Accelerator

2010 ◽  
Author(s):  
Ehsan Ebrahimi Basabi ◽  
Feryidoon Abbasi Davani
Keyword(s):  
Magnetic Field ◽  
Linear Accelerator ◽  
Longitudinal Magnetic Field ◽  
Cooling System ◽  
Heat Power ◽  
Light Velocity ◽  
Considerable Fraction ◽  
Applied Forces ◽  
Simulation Results ◽  
Set Up

One of the most important components of a linac is buncher. Throughout most of the buncher, the electrons are well forward of the crest and have velocities considerably less than light velocity, thus they are in a region of radial defocusing and a considerable fraction of the beam will be lost unless defocusing action is counteracted by some other applied forces. The simplest way to do this is to set up a longitudinal magnetic field which interacts with the radial motion of the electrons and causes them to follow helical orbits through the space occupied by the field. In this paper, five solenoids were designed to provide necessary magnetic field inside the buncher. Magnetic field was analytically calculated and compared with simulation results of CST. Because of resistance in wires, some amount of energy appears in form of heat, so heat power was calculated analytically and cooling system was designed for these solenoids by ANSYS.

scholarly journals GV/cm scale laser-magnetic resonant acceleration in vacuum

2017 ◽  
Vol 35 (3) ◽  
pp. 520-527 ◽  
Author(s):  
Y. Zhang ◽  
J.-L. Jiao ◽  
B. Zhang ◽  
Z.-M. Zhang ◽  
Y.-Q. Gu
Keyword(s):  
Magnetic Field ◽  
Phase Difference ◽  
Electron Bunch ◽  
Longitudinal Magnetic Field ◽  
Laser Intensity ◽  
Resonant Condition ◽  
Electron Accelerators ◽  
Simulation Results ◽  
Spatial Size ◽  
Resonant Acceleration

AbstractResonant acceleration of electrons by a laser in the background of an extra longitudinal magnetic field is investigated analytically and numerically. The resonant condition is independent of laser intensity, and when satisfied, the energy gain is proportional to $a_0^2 $ and the square of phase difference. This process is mainly limited by the magnitude and spatial size of the extra magnetic field. Under the laboratory conditions, simulation results show that a monoenergetic and collimated electron bunch can still be obtained in ~ GV/cm scale, which sheds a light on the vacuum table-top laser-driven electron accelerators.

Refinement of metal structure in arc surfacing under the effect of longitudinal magnetic field

2019 ◽  
Vol 2019 (2) ◽  
pp. 19-21
Author(s):  
A.D. Razmyshlyaev ◽  
◽  
M.V. Ageeva ◽  
E.V. Lavrova ◽  
◽  
...  
Keyword(s):  
Magnetic Field ◽  
Longitudinal Magnetic Field ◽  
Metal Structure

Research on Dynamic Balance Method of Precision Centrifuge

2014 ◽  
Vol 945-949 ◽  
pp. 777-780
Author(s):  
Tao Liu ◽  
Yong Xu ◽  
Bo Yuan Mao
Keyword(s):  
Mathematical Model ◽  
Balance Control ◽  
Dynamic Balance ◽  
Dynamic Balancing ◽  
Structure Characteristics ◽  
Balance System ◽  
Simulation Results ◽  
Set Up ◽  
System Controller ◽  
The Mathematical Model

Firstly, according to the structure characteristics of precision centrifuge, the mathematical model of its dynamic balancing system was set up, and the dynamic balancing scheme of double test surfaces, double emendation surfaces were established. Then the dynamic balance system controller of precision centrifuge was designed. Simulation results show that the controller designed can completely meet the requirements of precision centrifuge dynamic balance control system.

scholarly journals Design and evaluation of 10-kA class superconducting DC power cable based on longitudinal magnetic field effect

2021 ◽  
Vol 1975 (1) ◽  
pp. 012037
Author(s):  
Y Kinoshita ◽  
T Yonenaka ◽  
Y Ichiki ◽  
T Akasaka ◽  
E S Otabe ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Effect ◽  
Longitudinal Magnetic Field ◽  
Magnetic Field Effect ◽  
Power Cable ◽  
Dc Power

scholarly journals Simulations of Switchback, Fragmentation and Sunspot Pair in δ-Sunspots during Magnetic Flux Emergence

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 586
Author(s):  
Che-Jui Chang ◽  
Jean-Fu Kiang
Keyword(s):  
Magnetic Field ◽  
Solar System ◽  
Field Strength ◽  
Magnetic Flux ◽  
Initial Conditions ◽  
Observation Data ◽  
Flux Emergence ◽  
Polarity Inversion ◽  
Simulation Results ◽  
Spot Type

Strong flares and coronal mass ejections (CMEs), launched from δ-sunspots, are the most catastrophic energy-releasing events in the solar system. The formations of δ-sunspots and relevant polarity inversion lines (PILs) are crucial for the understanding of flare eruptions and CMEs. In this work, the kink-stable, spot-spot-type δ-sunspots induced by flux emergence are simulated, under different subphotospheric initial conditions of magnetic field strength, radius, twist, and depth. The time evolution of various plasma variables of the δ-sunspots are simulated and compared with the observation data, including magnetic bipolar structures, relevant PILs, and temperature. The simulation results show that magnetic polarities display switchbacks at a certain stage and then split into numerous fragments. The simulated fragmentation phenomenon in some δ-sunspots may provide leads for future observations in the field.

DESIGN OF A 300 000-Oe TWO-REGION SOLENOID FOR INTERMITTENT OPERATION

1964 ◽  
Vol 42 (7) ◽  
pp. 1343-1357 ◽  
Author(s):  
Richard Stevenson
Keyword(s):  
Magnetic Field ◽  
Cooling System ◽  
Operating Time ◽  
Maximum Power ◽  
Magnet System ◽  
Total Operating Time ◽  
Helium Gas ◽  
Intermittent Operation ◽  
The Magnetic Field ◽  
Capital Expense

This paper contains a design of an aluminum solenoid magnet system capable of producing a field of 300 000 Oe over a bore of 5.8 cm. The magnetic field is produced by a two-region solenoid operated at 15 °K and cooled by compressed helium gas. Details of the structure are described, and calculations are given for all important parts of the cooling system. The magnet is designed for a total operating time at maximum power of at least 40 minutes in a week. The low capital expense of the system makes it suitable for installation in small laboratories.

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