Four-harmonic buncher for radioactive and stable beams switching at the ATLAS facility

Kutsaev, Sergey; Smirnov, Alexander Yu.; Agustsson, R.; Chao, Dennis; Lynam, S.; Mustapha, B.; Sharamentov, S.I.

doi:10.1016/j.nima.2018.07.054

Cited by 11 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Figure 4(a) shows how the longitudinal separation (in z coordinate) between ions and the reference ion are decreasing. A bunching section of a 1.45 m length compresses the beam 3.7 times and captures 64% of injected ions, which will be improved with a pre-buncher [33], similar to the ATLAS RFQ. This section does not just bunch the beam, but also accelerates it.…”

Section: Methodsmentioning

confidence: 99%

Acceleration of heavy ions in inverse free electron laser

et al. 2021

View full text Add to dashboard Cite

In conventional linear accelerators, the beam is accelerated with a synchronous harmonic of the radio frequency field where the electric field component is collinear with the beam direction. This approach requires the design of complex accelerating structures, especially for low-energy heavy ions. If the beam motion were sustainably coupled to transverse electromagnetic fields, this could significantly simplify the accelerating structure design, and even allow acceleration with free-space waves. However, despite the long history of the proposed concept for accelerating low-velocity ion beams, it has not found practical application, partially because of the complexity of the technical design. In this paper, we present a practical design approach for this undulator-based accelerator for low-energy heavy-ions, reminiscent of the inverse free electron laser operating principle, but in a different parameter space.

show abstract

Section: Methodsmentioning

confidence: 99%

Acceleration of heavy ions in inverse free electron laser

et al. 2021

View full text Add to dashboard Cite

show abstract

“…These bunchers are very efficient since they allow simultaneous acceleration and bunching. As a reference, such a scheme is also applied for continuous wave ion RF quadrupoles (RFQs), where the pre-buncher is a multi-harmonic buncher (MHB) [68] and the tapered buncher is realized inside the RFQ channel. It allows reaching high capture and small longitudinal emittance [69,70].…”

Section: Buncher Types Overview and Design Strategymentioning

confidence: 99%

Electron bunchers for industrial RF linear accelerators: theory and design guide

Kutsaev

2021

Eur. Phys. J. Plus

View full text Add to dashboard Cite

The acceleration of electrons in resonant linear accelerators (linacs) typically consists of three main stages: (1) emission of the electrons from the cathode and their pre-acceleration with a DC field to the energy of tens of keV; (2) grouping the DC electron beam into bunches and their synchronization with the correct phase of high-frequency electromagnetic fields, and (3) accelerating the bunches of relativistic electrons to the required energies. Although many books describe the theoretical and practical aspects of electron linac design, most of them concentrate on beam physics in either the gun stage or in the relativistic regime, while leaving the description of the bunching process rather general. The physics of non-relativistic motion is described in the literature on ion accelerators, but in practice, it cannot be scaled to electron machines due to the significantly different particle mass and acceleration rate, beam velocity change, and frequencies. In this tutorial review paper, we will fill this gap with a detailed description of the bunching process and provide practical advice on the design of bunching sections in industrial-grade electron linacs.

show abstract

“…14. Typically, the design coupling strength is chosen slightly above 1.0 (~1.1-1.2), to ensure that the cavity is not undercoupled at any operation conditions [30].…”

Section: Design Of Dqwr Cavitymentioning

confidence: 99%

RF deflecting cavity for fast radioactive ion beams

et al. 2020

Self Cite

View full text Add to dashboard Cite

The Facility for Rare Isotope Beams (FRIB) will be a new scientific user facility that produces rare-isotope beams for experiments from the fragmentation of heavy ions at energies of 100–200 MeV/u. During the projectile fragmentation, the rare isotope of interest is produced along with many contaminants that need to be removed before the beam reaches detectors. At FRIB, this is accomplished with a magnetic projectile fragment separator. However, to achieve higher beam purity, in particular for proton-rich rare isotopes, additional purification is necessary. RadiaBeam in collaboration with Michigan State University (MSU) has designed a 20.125 MHz radiofrequency (RF) fragment separator capable of producing a 4 MV kick with 18 cm aperture in order to remove contaminant isotopes based on their time of flight. In this paper, we will discuss the RF and engineering design considerations of this separator cavity.

show abstract

Four-harmonic buncher for radioactive and stable beams switching at the ATLAS facility

Cited by 11 publications

References 7 publications

Acceleration of heavy ions in inverse free electron laser

Acceleration of heavy ions in inverse free electron laser

Electron bunchers for industrial RF linear accelerators: theory and design guide

RF deflecting cavity for fast radioactive ion beams

Contact Info

Product

Resources

About