Monitoring the magnetic axis misalignment in axially-symmetric magnets

Arpaïa, Pasquale; Celano, Biase; Vito, Luca De; Espósito, Antonio; Moccaldi, Nicola; Parrella, Alessandro

doi:10.1109/i2mtc.2018.8409851

Cited by 4 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the calculation of the magnetic field B we are using a state-of-the-art model by Derby & Olbert [44] that has been incorporated into a MATLAB tool by D. Cébron [45]. The success of this model has been demonstrated by various scientists and has been applied to many topics in solenoid research [46][47][48][49][50][51][52].…”

Section: Field Modelmentioning

confidence: 99%

A Novel Model of Unipolar Induction Phenomena Based on Direct Interaction Between Conductor Charges

Baumgärtel¹,

Smith²,

Maher³

2021

PIER

View full text Add to dashboard Cite

Unipolar induction has been a heavily discussed phenomenon in the realm of electrodynamics, with research and experiments proposing and supporting different ways to explain the observed effects. This paper presents a novel model to predict induced electromotive forces in a Faraday generator, based on direct interaction between conductor charges. It is compared with predictions that are usually obtained through considerations of Lorentz force, flux linking or flux cutting rules. A standard apparatus provides additional experimental measurements that show good agreement with the theory.

show abstract

Section: Field Modelmentioning

confidence: 99%

A Novel Model of Unipolar Induction Phenomena Based on Direct Interaction Between Conductor Charges

Baumgärtel¹,

Smith²,

Maher³

2021

PIER

View full text Add to dashboard Cite

show abstract

“…To this end, this paper tests three models for electron beam deflection -a direct-interaction model, a field based model, and predictions obtained with a commercially available software package. We present a direct-interaction model that considers the forces acting between the charge carriers of the electron beam and a coil to predict the deflection experienced by the beam due to the magnetic field, within the low velocity limit v ≪ c. The standard field model [25] is based on the derivations of Derby & Olbert [26] and Callaghan & Maslen [27], which has been further applied to solenoids with permeable cores, off-axis solenoids, parallel solenoids and axis alignment measurements [28][29][30][31][32][33]. These two models will be further compared to commercially available software CPO [34].…”

Section: Introductionmentioning

confidence: 99%

A Charged Particle Model based on Weber Electrodynamics for Electron Beam Trajectories in Coil and Solenoid Elements

Baumgärtel¹,

Maher²

2022

PIER C

View full text Add to dashboard Cite

To aid with the design, evaluation, and optimisation of charged particle instrumentation, computer modelling is often used. It is therefore of interest to obtain accurate predictions for trajectories of charged species with the help of simulation. Particularly for solenoids and coils, which are often used for guiding, deflecting or focussing particle beams, knowledge of the magnetic field is required, especially in the fringing field regions. A novel model, which is based on a direct-line-of-action force between interacting charges, is described in this paper which accurately predicts the deflection of an electron beam trajectory traversing through a coil and the fringe field region. The model is further compared with a standard field model and a commercially available software package. Additionally, a relatively straightforward experiment has been designed and implemented to verify the simulation results, where it is found that the presented direct-action model is equally as accurate as field-based simulations compared with the experimental results. Furthermore, the magnetic field of a solenoid is visualised and analysed in terms of its radial, axial, and total field strength and compared to a force map obtained from the direct-interaction model. This representation allows for further comparison of the field and force interaction models and it is found that they are qualitatively the same.

show abstract

Measuring the magnetic axis alignment during solenoids working

Arpaïa

Celano

Vito

et al. 2018

Sci Rep

Self Cite

View full text Add to dashboard Cite

A method for monitoring the misalignment of the magnetic axis in solenoids is proposed. This method requires only a few measurements of the magnetic field at fixed positions inside the magnet aperture, and thus overcomes the main drawback of sturdy moving mechanics of other Hall sensor-based methods. Conversely to state-of-the-art axis determination, the proposed method can be applied also during magnet operations, when the axis region and almost the whole remaining magnet aperture are not accessible. Moreover, only a few measurements of the magnetic field at fixed positions inside the magnet aperture are required: thus a slow process such as the mapping of the whole aperture of a magnet by means of moving stages is not necessary. The mathematical formulation of the method is explained, and a case study on a model of a multi–layer solenoid is presented. For this case study, the uncertainty is assessed and the optimal placement of the Hall transducers is derived.

show abstract

Monitoring the magnetic axis misalignment in axially-symmetric magnets

Cited by 4 publications

References 7 publications

A Novel Model of Unipolar Induction Phenomena Based on Direct Interaction Between Conductor Charges

A Novel Model of Unipolar Induction Phenomena Based on Direct Interaction Between Conductor Charges

A Charged Particle Model based on Weber Electrodynamics for Electron Beam Trajectories in Coil and Solenoid Elements

Measuring the magnetic axis alignment during solenoids working

Contact Info

Product

Resources

About