Optimization of low aspect ratio, iron dominated dipole magnets

Majernik, Nathan; Barber, Sarah; Tilborg, J. van; Rosenzweig, James; Leemans, Wim

doi:10.1103/physrevaccelbeams.22.032401

Cited by 4 publications

(3 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other standard approaches to undulator development may include superconducting undulators, where designs with periods nearing those needed have been studied [152]. At few-mm period length, development work on novel variations on short period Halbach arrays is being pursued [59]. At the mm-to-sub-mm scale, there has been progress reported on mesoscale machined undulators [153,79]; designs so far do not reach the peak fields needed, and the innovations introduced at the few mm-period may be necessary in this scaled down device.…”

Section: Discussionmentioning

confidence: 99%

“…There are two possible paths forward that arise from current research trends. The first is that one may utilize beams that are stretched either transversely, using a transverse gradient undulator [58], or longitudinally through a chicane transformation [59], to mitigate the influence of energy spread on the gain of the FEL. These approaches produce modest advantages [60].…”

Section: Alternative Approaches For High Brightness Beam Productionmentioning

confidence: 99%

See 1 more Smart Citation

Towards an ultra-compact x-ray free-electron laser (Conference Presentation)

Rosenzweig

2019

Advances in Laboratory-Based X-Ray Sources, Optics, and Applications VII

View full text Add to dashboard Cite

In the field of beam physics, two frontier topics have taken center stage due to their potential to enable new approaches to discovery in a wide swath of science. These areas are: advanced, high gradient acceleration techniques, and xray free electron lasers (XFELs). Further, there is intense interest in the marriage of these two fields, with the goal of producing a very compact XFEL. In this context, recent advances in high gradient radio-frequency cryogenic copper structure research have opened the door to the use of surface electric fields between 250 and 500 MV/m. Such an approach is foreseen to enable a new generation of photoinjectors with sixdimensional beam brightness beyond the current state-of-the-art by well over an order of magnitude. This advance is an essential ingredient enabling an ultra-compact XFEL (UC-XFEL). In addition, one may accelerate these bright beams to GeV scale in less arXiv:2003.06083v1 [physics.acc-ph]An Ultra-Compact X-Ray Free-Electron Laser 2 than 10 meters. Such an injector, when combined with inverse free electron laserbased bunching techniques can produce multi-kA beams with unprecedented beam quality, quantified by 50 nm-rad normalized emittances. These beams, when injected into innovative, short-period (1-10 mm) undulators uniquely enable UC-XFELs having footprints consistent with university-scale laboratories. We describe the architecture and predicted performance of this novel light source, which promises photon production per pulse of a few percent of existing XFEL sources. We review implementation issues including collective beam effects, compact x-ray optics systems, and other relevant technical challenges. To illustrate the potential of such a light source to fundamentally change the current paradigm of XFELs with their limited access, we examine possible applications in biology, chemistry, materials, atomic physics, industry, and medicine which may profit from this new model of performing XFEL science.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Alternative Approaches For High Brightness Beam Productionmentioning

confidence: 99%

Towards an ultra-compact x-ray free-electron laser (Conference Presentation)

Rosenzweig

2019

Advances in Laboratory-Based X-Ray Sources, Optics, and Applications VII

View full text Add to dashboard Cite

show abstract

“…The core concept behind BELLA Center's approach to plasma-driven FELs are two-fold: (1) To mitigate the intrinsic %-level energy spread on the LPA beams, a chicane acts as a decompressor [64,65] (making the electron beam longer by longitudinally separating the electrons of various energies). Due to the unconventional properties of LPA beams (very little R 56 needed since the beams are ultra-short at the source, but having a relatively large beam size at the chicane), a low-aspect ratio chicane was developed and commissioned in collaboration with UCLA [95]. (2) To increase the electron beam density over an extended length inside the undulator, the VISA undulator was commissioned for this experiment.…”

Section: Lbnl Bella Centermentioning

confidence: 99%

Free electron lasers driven by plasma accelerators: status and near-term prospects

Emma

Tilborg

Aßmann

et al. 2021

High Pow Laser Sci Eng

Self Cite

View full text Add to dashboard Cite

Owing to their ultra-high accelerating gradients, combined with injection inside micrometer-scale accelerating wakefield buckets, plasma-based accelerators hold great potential to drive a new generation of free-electron lasers (FELs). Indeed, the first demonstration of plasma-driven FEL gain was reported recently, representing a major milestone for the field. Several groups around the world are pursuing these novel light sources, with methodology varying in the use of wakefield driver (laser-driven or beam-driven), plasma structure, phase-space manipulation, beamline design, and undulator technology, among others. This paper presents our best attempt to provide a comprehensive overview of the global community efforts towards plasma-based FEL research and development.

show abstract

An ultra-compact x-ray free-electron laser

et al. 2020

View full text Add to dashboard Cite

In the field of beam physics, two frontier topics have taken center stage due to their potential to enable new approaches to discovery in a wide swath of science. These areas are: advanced, high gradient acceleration techniques, and x-ray free electron lasers (XFELs). Further, there is intense interest in the marriage of these two fields, with the goal of producing a very compact XFEL. In this context, recent advances in high gradient radio-frequency cryogenic copper structure research have opened the door to the use of surface electric fields between 250 and 500 MV m−1. Such an approach is foreseen to enable a new generation of photoinjectors with six-dimensional beam brightness beyond the current state-of-the-art by well over an order of magnitude. This advance is an essential ingredient enabling an ultra-compact XFEL (UC-XFEL). In addition, one may accelerate these bright beams to GeV scale in less than 10 m. Such an injector, when combined with inverse free electron laser-based bunching techniques can produce multi-kA beams with unprecedented beam quality, quantified by 50 nm-rad normalized emittances. The emittance, we note, is the effective area in transverse phase space (x, p x /m e c) or (y, p y /m e c) occupied by the beam distribution, and it is relevant to achievable beam sizes as well as setting a limit on FEL wavelength. These beams, when injected into innovative, short-period (1–10 mm) undulators uniquely enable UC-XFELs having footprints consistent with university-scale laboratories. We describe the architecture and predicted performance of this novel light source, which promises photon production per pulse of a few percent of existing XFEL sources. We review implementation issues including collective beam effects, compact x-ray optics systems, and other relevant technical challenges. To illustrate the potential of such a light source to fundamentally change the current paradigm of XFELs with their limited access, we examine possible applications in biology, chemistry, materials, atomic physics, industry, and medicine—including the imaging of virus particles—which may profit from this new model of performing XFEL science.

show abstract

Optimization of low aspect ratio, iron dominated dipole magnets

Cited by 4 publications

References 18 publications

Towards an ultra-compact x-ray free-electron laser (Conference Presentation)

Towards an ultra-compact x-ray free-electron laser (Conference Presentation)

Free electron lasers driven by plasma accelerators: status and near-term prospects

An ultra-compact x-ray free-electron laser

Contact Info

Product

Resources

About