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Title: A state of the art current-septum dipole magnet

Abstract

Here, the acceleration process of charged particle beams often requires the use of few acceleration stages to provide the beam with the desired energy. The extraction of the beam from one acceleration stage and the injection to the next, both require a special type of magnet which comes under the name septum magnet. Such a magnet generates a strong field in one region and a very low field in another region with the two regions separated by a very thin material (septum). The septum thickness of such a magnet should be as thin as possible to reduce the strength of other devices, like kickers, which are involved in the extraction or injection processes. A thin septum is also advantageous during the slow beam extraction process to reduce the beam losses at the septum. One of the methods which in theory can generate very large differences in field strength in adjacent field regions separated by a thin septum, is the use of two thin parallel current sheets of infinite dimensions. In practice we use other devices that can approximate such an abrupt change of the magnetic field within the septum thickness. In this paper we describe such a device, the DCmore » current septum, we present results from the study of its electromagnetic properties, and we discuss a method to minimize the magnetic field in the region which requires a very small magnetic field. We also provide some results from the experimental measurements of the magnetic field generated by the D6 current septum magnet which is installed in the experimental beam line of the NASA’s Space Radiation Laboratory (NSRL) facility [1],[2] at Brookhaven National Laboratory (BNL). This septum magnet is part of the beam’s extraction system from the AGS-Booster into the NSRL beam line for material and biological studies.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1483753
Report Number(s):
BNL-209518-2018-JAAM
Journal ID: ISSN 0168-9002
Grant/Contract Number:  
SC0012704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment; Journal ID: ISSN 0168-9002
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; Current-Septum magnet

Citation Formats

Tsoupas, Nicholaos, Brown, K., Meot, F., Pearson, C., Pile, P., Ptitsyn, V., and Rusek, A. A state of the art current-septum dipole magnet. United States: N. p., 2018. Web. doi:10.1016/j.nima.2018.11.127.
Tsoupas, Nicholaos, Brown, K., Meot, F., Pearson, C., Pile, P., Ptitsyn, V., & Rusek, A. A state of the art current-septum dipole magnet. United States. doi:10.1016/j.nima.2018.11.127.
Tsoupas, Nicholaos, Brown, K., Meot, F., Pearson, C., Pile, P., Ptitsyn, V., and Rusek, A. Wed . "A state of the art current-septum dipole magnet". United States. doi:10.1016/j.nima.2018.11.127.
@article{osti_1483753,
title = {A state of the art current-septum dipole magnet},
author = {Tsoupas, Nicholaos and Brown, K. and Meot, F. and Pearson, C. and Pile, P. and Ptitsyn, V. and Rusek, A.},
abstractNote = {Here, the acceleration process of charged particle beams often requires the use of few acceleration stages to provide the beam with the desired energy. The extraction of the beam from one acceleration stage and the injection to the next, both require a special type of magnet which comes under the name septum magnet. Such a magnet generates a strong field in one region and a very low field in another region with the two regions separated by a very thin material (septum). The septum thickness of such a magnet should be as thin as possible to reduce the strength of other devices, like kickers, which are involved in the extraction or injection processes. A thin septum is also advantageous during the slow beam extraction process to reduce the beam losses at the septum. One of the methods which in theory can generate very large differences in field strength in adjacent field regions separated by a thin septum, is the use of two thin parallel current sheets of infinite dimensions. In practice we use other devices that can approximate such an abrupt change of the magnetic field within the septum thickness. In this paper we describe such a device, the DC current septum, we present results from the study of its electromagnetic properties, and we discuss a method to minimize the magnetic field in the region which requires a very small magnetic field. We also provide some results from the experimental measurements of the magnetic field generated by the D6 current septum magnet which is installed in the experimental beam line of the NASA’s Space Radiation Laboratory (NSRL) facility [1],[2] at Brookhaven National Laboratory (BNL). This septum magnet is part of the beam’s extraction system from the AGS-Booster into the NSRL beam line for material and biological studies.},
doi = {10.1016/j.nima.2018.11.127},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
issn = {0168-9002},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {11}
}

Journal Article:
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This content will become publicly available on November 28, 2019
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