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Title: Difference resonance study on the electron storage ring Aladdin at SRC

Abstract

We have studied the third-order betatron difference resonance on the electron storage ring Aladdin at SRC. The spare chromaticity correcting sextupoles were utilized to drive the desired harmonics and a pulsed kicker magnet was fired to produce the coherent oscillation of a single beam bunch. We took beam position measurements from four pairs of stripline electrodes and data acquisition devices. We observed the coupling resonance. Several typical measurements are shown. A computer program was written using multipartite tracking to simulate the bunch motion. The simulations agree well both with analytic predictions and with the experimental results.

Authors:
 [1]; ; ;  [2];  [3];  [4]
+ Show Author Affiliations
  1. Argonne National Lab., IL (United States)|[Wisconsin Univ., Madison, WI (United States). Dept. of Physics
  2. Argonne National Lab., IL (United States)
  3. Wisconsin Univ., Madison, WI (United States). Dept. of Physics
  4. Wisconsin Univ., Stoughton, WI (United States). Synchrotron Radiation Center
Publication Date:
Research Org.:
Argonne National Lab., IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
87838
Report Number(s):
LS-183
ON: DE95015398; TRN: 95:017813
DOE Contract Number:
W-31-109-ENG-38
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: [1995]
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; STORAGE RINGS; BEAM OPTICS; BETATRON OSCILLATIONS; COMPUTERIZED SIMULATION; ERRORS; MAGNETIC FIELDS; SYNCHROTRON RADIATION SOURCES; ELECTRON BEAMS; KICKER MAGNETS; HARMONICS; BEAM BUNCHING; DATA ACQUISITION SYSTEMS; BEAM DYNAMICS

Citation Formats

Liu, J., Crosbie, E., Teng, L., Bridges, J., Symon, K., and Trzeciak, W.. Difference resonance study on the electron storage ring Aladdin at SRC. United States: N. p., 1995. Web. doi:10.2172/87838.
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Liu, J., Crosbie, E., Teng, L., Bridges, J., Symon, K., & Trzeciak, W.. Difference resonance study on the electron storage ring Aladdin at SRC. United States. doi:10.2172/87838.
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Liu, J., Crosbie, E., Teng, L., Bridges, J., Symon, K., and Trzeciak, W.. Sat . "Difference resonance study on the electron storage ring Aladdin at SRC". United States. doi:10.2172/87838. https://www.osti.gov/servlets/purl/87838.
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@article{osti_87838,
title = {Difference resonance study on the electron storage ring Aladdin at SRC},
author = {Liu, J. and Crosbie, E. and Teng, L. and Bridges, J. and Symon, K. and Trzeciak, W.},
abstractNote = {We have studied the third-order betatron difference resonance on the electron storage ring Aladdin at SRC. The spare chromaticity correcting sextupoles were utilized to drive the desired harmonics and a pulsed kicker magnet was fired to produce the coherent oscillation of a single beam bunch. We took beam position measurements from four pairs of stripline electrodes and data acquisition devices. We observed the coupling resonance. Several typical measurements are shown. A computer program was written using multipartite tracking to simulate the bunch motion. The simulations agree well both with analytic predictions and with the experimental results.},
doi = {10.2172/87838},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jul 01 00:00:00 EDT 1995},
month = {Sat Jul 01 00:00:00 EDT 1995}
}
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Technical Report:
View Technical Report (0.74 MB)
DOI:  10.2172/87838
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  • This dissertation presents the theoretical and experimental study of the nonlinear beam dynamics on the Aladdin electron storage ring at Synchrotron Radiation Center (SRC), University of Wisconsin-Madison. The study includes third and fourth integral resonances, third order difference and sum coupling resonances. Among the nonlinear resonance studies, the particle diffusion in the resonance phase space is of great interest. The nonlinear resonance features are analyzed, based on the Hamiltonian and the Birkhoff-Moser transformation. The two dimensional coupling resonances are specially discussed by introducing the resonance phase space, in which the two degrees of freedom are reduced to one degree. Themore » resonance features were experimentally observed, associated with decoherent damping due to the finite beam size and the nonlinear detuning. The particle diffusion from the resonance island was measured, which was found to be strongly dependent upon the machine chromaticity and driving sextupole strength. The damping oscillatory option of the beam centroid is numerically simulated with multi-particle tracking. The stochastic diffusion process is simulated by including the effect from quantum fluctuation. The comparisons show good agreements between measurements and theoretical predictions.« less

  • ; ; ; ...
    The dynamics of the beam in the resonance islands was studied on the electron storage ring Aladdin at the Synchrotron Radiation Center (SRC). The authors especially studied the horizontal third- and fourth-integral resonances driven by sextupole fields in the first and second order. A fast kicker was fired to kick the beam into one of the outboard stable islands. The beam took on a quasi-Gaussian distribution and slowly diffused out of the island. The diffusion rate and its dependence on the strengths of the driving sextupoles and the chromaticity sextupoles were measured by tracing the resonance peak of the betatronmore » oscillation on the spectrum analyzer. Beam positions were also recorded through the data acquisition device which was locked by a pulse-delay circuitry. Interesting results are shown and compared with numerical calculations.« less

  • ; ; ; ...
    The unique features of undulator radiation, i.e., high photon flux and brightness, partial coherence, small beam divergence, spectral tunability, etc., mandate that undulators be included in the future plans for Aladdin. This will make it possible to perform the next generation of experiments in photon-stimulated spectroscopies. A team of scientists (see Appendix) has now been assembled to build an insertion device (ID) and the associated beam line at Aladdin. In considering the specifications for the ID, it was assumed that the ID beamline will be an SRC user facility. Consequently, design parameters were chosen with the intent of maximizing experimentalmore » flexibility consistent with a conservative design approach. A tunable ''clamshell'' undulator device was Chosen with a first harmonic tunable from 35 to 110 eV to operate on a 1 GeV storage ring. Higher harmonics will be utilized for experiments needing higher photon energies.« less

  • ; ; ; ...

  • The results of a design study for a free electron laser storage ring are discussed. The goal of the study was to show the feasibility of a storage ring beam to be used as the driver for a free electron laser. The requirements for such a storage ring in many respects are more demanding than the parameters of colliding beam storage rings; however, experience and results of many fundamental studies on existing storage rings give us confidence that none of the parameters required for a free electron laser storage ring exceeds the technical possibilities. In fact it was found thatmore » the storage ring parameters are well within the state of the art and still leave significant freedom for further optimization. Some of the most characteristic storage ring parameters as obtained in this design study are listed in a table.« less