An analytical study of double bend achromat lattice

Fakhri, Ali Akbar; Kant, Pradeep; Ghodke, A. D.

doi:10.1063/1.4914389

Cited by 6 publications

(5 citation statements)

References 10 publications

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“…It is also shown that the amplitude of quadrupolar wake potentials in horizontal and vertical direction of the beam pipe are not same due to the geometrical form factor of annular gap around the BPMs. At the end, the effects of pick-ups wake potentials on the circulating beam in the storage ring double-bend achromat lattice [9] are investigated utilizing the ELEGANT particle tracking code [8].…”

Section: Discussionmentioning

confidence: 99%

“…In order to have a low emittance synchrotron machine with multi bend achromat lattice [9], stability of the beam in the storage ring is very important. One of the key parameters in the stability of…”

Section: Beam Pipe and Pick-ups Structurementioning

confidence: 99%

“…Both methods yield the same results as can be seen in figure 7. To identify the effects of pick-ups wake potentials on the circulating beam in the storage ring with double-bend achromat lattice [9], the ELEGANT particle tracking code [8] is used. After using the Green function [15] for longitudinal and transverse wake potentials of 200 pick-ups in the storage ring, the results are imported to ELEGANT [8] for 33 mA current per bunch and 20 K turns.…”

Section: Transverse Wake Potentialmentioning

confidence: 99%

“…Through this paper, after calculating generalized wake potential separately by adding quadrupolar and dipolar transverse wake potentials, we could rapidly calculate the total transverse wake potential through displacing test and source beam together from the center of the beam pipe. Finally, we have used ELEGANT particle tracking code [8] and tracked the beam for twenty thousand turns in storage ring with the double bend achromat lattice [9] in order to simulate the effects of the wake-fields on the bunch length, longitudinal emittance, and particle losses.…”

Section: Introductionmentioning

confidence: 99%

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A study of wake potentials for the pick-ups in storage ring

2017

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Calculating wake potentials in accelerators are necessary in order to optimize the accelerator performance in terms of stored current and emittance. Wake potentials due to pick-ups can be an important source for current and emittance degradation. In this paper, we present theoretical analysis and computer simulations of the wake potentials for the beam pipe with and without mounted pick-ups. We introduce generalized wake potential to calculate the transverse wake-field and analyze the effect of pick-ups on these potentials. In addition, the effects of wake potentials due to pick-ups on the bunch length and emittance are studied using ELEGANT particle tracking code.

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Section: Discussionmentioning

confidence: 99%

Section: Beam Pipe and Pick-ups Structurementioning

confidence: 99%

Section: Transverse Wake Potentialmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A study of wake potentials for the pick-ups in storage ring

2017

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“…To prevent this situation, the transport line adopted achromatic design. In the vertical plane, both upward and downward deflection apply the Double-Bend-Achromat (DBA) [10] module, which is a well-known method to bend the beam while restoring the dispersion to zero. The arc section, deflecting in the horizontal plane, adopts the same MBA structure as the storage ring.…”

Section: Jinst 19 T04008mentioning

confidence: 99%

A tool for beam optics design and its application on the VEGA transport line at ELI-NP

Chen,

Tian,

Schubert

et al. 2024

J. Inst.

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The Variable Energy Gamma (VEGA) System, currently under construction at Extreme Light Infrastructure-Nuclear Physics (ELI-NP), is a storage ring-based gamma beam source that aims to provide gamma-ray beams with a variable energy range from 1 MeV to 19.5 MeV to the users. The electron beam transport line has been designed to connect the linear accelerator and the storage ring in the VEGA electron beam system. Considering the geometrical constraints in the accelerator halls and the location of the injection point at the storage ring, the trajectory of the electron beam in the transport line has to first ascend by a 36-degree dog-leg elevation to align with a plane parallel to the storage ring, undergo a 180-degree horizontal turn, and then descend by 36 degrees vertically to reach the injection point at the storage ring. In this paper, we introduce a beam optics tool implemented for the beam optics design and fine-matching in the electron beam transport line. The design of the VEGA transport line including the layout and lattice design, is also described. The tool has been applied to the beam optics design and optimization, utilizing tracking simulations and beam matching for the VEGA transport line lattice. Furthermore, the tool's potential application to similar lattice designs is also discussed.

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Applications of X-Ray Micro-Beam for Data Collection

Sanishvili

Fischetti

2017

Methods in Molecular Biology

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Micro-diffraction tools for macromolecular crystallography, first developed at the end of 1990s and now an integral part of many synchrotron beamlines, enable some of the experiments which were not feasible just a decade or so ago. These include data collection from very small samples, just a few micrometers in size; from larger, but severely inhomogeneous samples; and from samples which are optically invisible. Improved micro-diffraction tools led to improved signal-to-noise ratio, to mitigation of radiation damage in some cases, and to better-designed diffraction experiments. Small, micron-scale beams can be attained in different ways and knowing the details of the implementation is important in order to design the diffraction experiment properly. Similarly, precision, reproducibility and stability of the goniometry, and caveats of detection systems need to be taken into account. Lastly, to make micro-diffraction widely applicable, the sophistication, robustness, and user-friendliness of these tools are just as important as the technical capabilities.

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An analytical study of double bend achromat lattice

Cited by 6 publications

References 10 publications

A study of wake potentials for the pick-ups in storage ring

A study of wake potentials for the pick-ups in storage ring

A tool for beam optics design and its application on the VEGA transport line at ELI-NP

Applications of X-Ray Micro-Beam for Data Collection

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