Beam size and bunch length measurements at the Anka storage ring

Pérez, Francis; Birkel, I.; Huttel, E.; Moller, A.S.; Pont, M.

doi:10.1109/pac.2003.1289886

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…6 we estimate a bunch length (FWHM) of 17.8 ± 0.15 ps including the broadening by the synchrotron oscillation. Here, fits to every turn-by-turn measurement result, at similar experimental conditions, in comparable values 59 . The PSDs shown in Fig.…”

Section: Details Of the Post-measurement Data Processing And The Back...mentioning

confidence: 69%

Revealing the dynamics of ultrarelativistic non-equilibrium many-electron systems with phase space tomography

Funkner

Niehues

Nasse

et al. 2023

Sci Rep

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The description of physical processes with many-particle systems is a key approach to the modeling of numerous physical systems. For example in storage rings, where ultrarelativistic particles are agglomerated in dense bunches, the modeling and measurement of their phase-space distribution is of paramount importance: at any time the phase-space distribution not only determines the complete space-time evolution but also provides fundamental performance characteristics for storage ring operation. Here, we demonstrate a non-destructive tomographic imaging technique for the 2D longitudinal phase-space distribution of ultrarelativistic electron bunches. For this purpose, we utilize a unique setup, which streams turn-by-turn near-field measurements of bunch profiles at MHz repetition rates. To demonstrate the feasibility of our method, we induce a non-equilibrium state and show that the phase-space distribution microstructuring as well as the phase-space distribution dynamics can be observed in great detail. Our approach offers a pathway to control ultrashort bunches and supports, as one example, the development of compact accelerators with low energy footprints.

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Section: Details Of the Post-measurement Data Processing And The Back...mentioning

confidence: 69%

Revealing the dynamics of ultrarelativistic non-equilibrium many-electron systems with phase space tomography

Funkner

Niehues

Nasse

et al. 2023

Sci Rep

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“…The flexibility in the choice of beam energy is of advantage for the generation of such short electron bunches. Previous studies have shown that the bunch length at ANKA is shortest at a beam energy of about 1.3 GeV due to longitudinal instabilities at lower beam energies [4]. To further reduce the bunch length, the storage ring optics is modified to yield a lattice with a significantly reduced momentum compaction factor.…”

Section: Introductionmentioning

confidence: 99%

Far Infrared Coherent Synchrotron Edge Radiation at ANKA

Müller

Mathis

Birkel

et al. 2006

Synchrotron Radiation News

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A synchrotron radiation source emits coherent infrared (IR) radiation when the electron bunch length is comparable to the wavelength of the emitted radiation (see for example [1, 2]). To generate coherent radiation in the far IR (THz) region, a 'low alpha mode' has been devised at the ANKA storage ring operating at 1.3 GeV. The corresponding lattice has a significantly reduced momentum compaction factor. The spectral dependence of the emitted radiation is recorded at the ANKA-IR beam line, where the synchrotron light is produced in the fringe field of a bending magnet [3]. This edge radiation has the advantage of being more collimated than constant field radiation. This allows the observation of frequencies down to 1 cm −1 through a modest vertical aperture, which would not be possible with classical constant field emission due to the increasing beam divergence with decreasing frequency. The onset of coherent emission is found at a synchrotron frequency of about 10 kHz. At 5 kHz, an intensity enhancement of up to 5 orders of magnitude, with respect to the incoherent emission, is observed in the spectral range between 1 and 65 cm −1 .

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