Beam extraction of the pop ffag with a massless septum

Yonemura, Y.; Adachi, Toshikazu; Aiba, M.; Machida, S.; Mori, Y.; Muto, Atsutoshi; Nakano, J.; Ohmori, C.; Sakai, I.; Suzuki, Yasuo; Sugaya, Masakazu; Takagi, A.; Ueno, R.; Uesugi, T.; Yamazaki, Atsushi; Yokoi, T.; Yoshimoto, Masahiro; Yuasa, Y.; Matoba, M.; Koba, K.

doi:10.1109/pac.2003.1288634

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…A massless septum is a septum device that has a high field and a (near) zero field region, without a physical separation between them. The transition between the high field and zero field region is not instantaneous but gradual [201][202][203]. The septum thickness is defined as the space between the 2 regions, defined by chosen percentages of the main field (5-95% for example).…”

Section: Magnetic Septamentioning

confidence: 99%

Accelerator Engineering and Technology: Accelerator Technology

Bordry

Bottura

Milanese

et al. 2020

Particle Physics Reference Library

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Magnets are at the core of both circular and linear accelerators. The main function of a magnet is to guide the charged particle beam by virtue of the Lorentz force, given by the following expression: F = q v × B, (8.1) where q is the electrical charge of the particle, v its velocity, and B the magnetic field induction. The trajectory of a particle in the field depends hence on the particle Coordinated by F. Bordry

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Section: Magnetic Septamentioning

confidence: 99%

Accelerator Engineering and Technology: Accelerator Technology

Bordry

Bottura

Milanese

et al. 2020

Particle Physics Reference Library

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“…As the result, the electrodes and the septum were electrically shorted and the beam operation has been stopped for a short period [4]. In order to avoid the beam loss at septum in the slow extraction principally, beam separation through slow extraction has been studied with a non-destructive device using a magnetic field [5], but there is the issue that the included nonlinear components have a significant influence on the circulating beam. Therefore, we study a non-destructive device using the multi electrodes, which can generate and control the parallel electric fields and potentials.…”

Section: Introductionmentioning

confidence: 99%

Proposal of Non-destructive Device for Slow Extraction

Shimogawa

Harada

2021

Proceedings of the 3rd J-Parc Symposium (J-Parc2019)

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Particle beams from accelerators such as synchrotrons have been used in physics experiments and in medical applications. In a slow extraction scheme that extracts beams from a synchrotron over many turns, the accelerated beam is slowly blown up, deflected, and separated by an electrostatic septum. The electrostatic septum creates an electric field and separates an extraction beam using electrodes and a septum. Generally, a wire or plate is used for the septum and beam loss caused when passing through it is inevitable. Consequently, the extraction efficiency and beam power are limited because of the beam loss and the device's radio-activation. We newly propose a non-destructive electrostatic septum, where multiple electrodes are arranged surrounding the beam and produce an electric field that deflects and separates the beam. This device does not involve any materials in the beam orbit area. We introduce our proposed non-destructive electrostatic septum and discuss a few simulation studies.

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