scholarly journals Studies on sextupole components generated by Eddy currents in the rapid cycling medical synchrotron

2004 ◽  
Author(s):  
J. Cardona ◽  
D.T. Abell ◽  
S. Peggs
Keyword(s):  
Eddy Currents ◽  
Rapid Cycling ◽  
Medical Synchrotron

scholarly journals Rapid Cycling Medical Synchrotron

2007 ◽  
Author(s):  
Stephen Peggs ◽  
Michael Furey
Keyword(s):  
Rapid Cycling ◽  
Medical Synchrotron

scholarly journals Ions in a Rapid Cycling Medical Synchrotron

2006 ◽  
Author(s):  
Satogata T. ◽  
E. Beebe ◽  
S. Peggs
Keyword(s):  
Rapid Cycling ◽  
Medical Synchrotron

scholarly journals Pre-conceptual Design of a Rapid Cycling Medical Synchrotron

1999 ◽  
Author(s):  
Favale A. ◽  
T. Myers ◽  
J. Rathke ◽  
J. Sredniawski ◽  
A. Todd ◽  
...  
Keyword(s):  
Conceptual Design ◽  
Rapid Cycling ◽  
Medical Synchrotron

Optical design of the rapid cycling medical synchrotron

2003 ◽  
Vol 50 (4) ◽  
pp. 1147-1152 ◽  
Author(s):  
J. Cardona ◽  
S. Peggs ◽  
J. Kewisch
Keyword(s):  
Optical Design ◽  
Rapid Cycling ◽  
Medical Synchrotron

scholarly journals A Cost-Effective Rapid-Cycling Synchrotron

2019 ◽  
Vol 10 (01) ◽  
pp. 245-266
Author(s):  
Sergei Nagaitsev ◽  
Valeri Lebedev
Keyword(s):  
Eddy Current ◽  
Vacuum Chamber ◽  
Eddy Currents ◽  
Cost Effective ◽  
Thin Wall ◽  
Rapid Cycling ◽  
Vacuum Chambers ◽  
High Impedance ◽  
Rf Cavities ◽  
Rapid Cycling Synchrotron

The present Fermilab proton Booster is an early example of a rapid-cycling synchrotron (RCS). Built in 1960s, it features a design in which the combined-function dipole magnets serve as vacuum chambers. Such a design is quite cost-effective, and it does not have the limitations associated with the eddy currents in a metallic vacuum chamber. However, an important drawback of that design is a high impedance, as seen by a beam, because of the magnet laminations. More recent RCS designs (e.g. J-PARC) employ large and complex ceramic vacuum chambers in order to mitigate the eddy-current effects and to shield the beam from the magnet laminations. Such a design, albeit very successful, is quite costly because it requires large-bore magnets and large-bore RF cavities. In this paper, we consider an RCS concept with a thin-wall metallic vacuum chamber as a compromise between the chamber-less Fermilab Booster design and the large-bore design with ceramic chambers.

Determination of eddy current losses and hysteresis losses in magnetic circuits of electrical machines

2020 ◽  
pp. 54-58
Author(s):  
S. M. Plotnikov
Keyword(s):  
Eddy Current ◽  
Magnetization Reversal ◽  
Eddy Currents ◽  
Technical Problem ◽  
Electrical Machines ◽  
Eddy Current Losses ◽  
Hysteresis Losses ◽  
Magnetic Circuits ◽  
Core Losses ◽  
Reversal Frequency

The division of the total core losses in the electrical steel of the magnetic circuit into two components – losses dueto hysteresis and eddy currents – is a serious technical problem, the solution of which will effectively design and construct electrical machines with magnetic circuits having low magnetic losses. In this regard, an important parameter is the exponent α, with which the frequency of magnetization reversal is included in the total losses in steel. Theoretically, this indicator can take values from 1 to 2. Most authors take α equal to 1.3, which corresponds to the special case when the eddy current losses are three times higher than the hysteresis losses. In fact, for modern electrical steels, the opposite is true. To refine the index α, an attempt was made to separate the total core losses on the basis that the hysteresis component is proportional to the first degree of the magnetization reversal frequency, and the eddy current component is proportional to the second degree. In the article, the calculation formulas of these components are obtained, containing the values of the total losses measured in idling experiments at two different frequencies, and the ratio of these frequencies. It is shown that the rational frequency ratio is within 1.2. Presented the graphs and expressions to determine the exponent α depending on the measured no-load losses and the frequency of magnetization reversal.

Sign in / Sign up

Export Citation Format

Share Document