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M. Borland

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Last Name: Borland

Full Name: M. Borland

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8 papers
title: Start-to-End Simulations for the LCLS X-Ray Free-Electron Laser
format: conference proceeding
conference: FEL 2003 25th
year: 2003
7 authors: Sven Reiche | C. Pellegrini | P. Emma | Nuhn, H. D. | Limborg, C. G. | Borland, M. | W. Fawley
abstract: The LCLS Free-Electron Lasers operates in the wavelength range of 1.5-15 Angstrom, using an electron beam with an energy between 4.5 and 14.5 GeV. The generation of the electron beam, the preservation of its brightness during acceleration and compression, and the amplififcation of the spontaneous radiation within the FEL can only be described by a consistent set of simulation codes. We preset the change in the FEL performance with respect to the LCLS design case, when various effects are included, altering the electron beam distribution and motion (e.g. wake fields, CSR, magnet misalignment or field errors of the undulator field). To distinguish the individual contribution of each effect, multiple start-end simulations are performed, including step by step additional effects and, thus, approaching a more and more realistic model of the LCLS FEL.
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title: Self-amplified spontaneous emission saturation at the Advanced Photon Source free-electron laser
format: journal article
publisher: Review of Scientific Instruments
year: 2002
29 authors: E. R. Moog | S. V. Milton | N. D. Arnold | C. Benson | W. Berg | S. G. Biedron | M. Borland | Y. C. Chae | R. J. Dejus | P. K. Den Hartog | B. Deriy | M. Erdmann | E. Gluskin | Z. Huang | K. J. Kim | J. W. Lewellen | Y. Li | A. H. Lumpkin | O. Makarov | A. Nassiri | V. Sajaev | R. Soliday | B. J. Tieman | E. M. Trakhtenberg | G. Travish | I. B. Vasserman | N. A. Vinokurov | G. Wiemerslage | B. X. Yang
abstract: Today, many bright photon beams in the ultraviolet and x-ray wavelength range are produced by insertion devices installed in specially designed third-generation storage rings. There is the possibility of producing photon beams that are orders of magnitude brighter than presently achieved at synchrotron sources, by using self-amplified spontaneous emission (SASE). At the Advanced Photon Source (APS), the low-energy undulator test line (LEUTL) free-electron laser (FEL) project was built to explore the SASE process in the visible through vacuum ultraviolet wavelength range. While the understanding gained in these experiments will guide future work to extend SASE FELs to shorter wavelengths, the APS FEL itself will become a continuously tunable, bright light source. Measurements of the SASE process to saturation have been made at 530 and 385 nm. A number of quantities were measured to confirm our understanding of the SASE process and to verify that saturation was reached. The intensity of the FEL light was measured versus distance along the FEL, and was found to flatten out at saturation. The statistical variation of the light intensity was found to be wide in the exponential gain region where the intensity is expected to be noisy, and narrower once saturation was reached. Absolute power measurements compare well with GINGER simulations. The FEL light spectrum at different distances along the undulator line was measured with a high-resolution spectrometer, and the many sharp spectral spikes at the beginning of the SASE process coalesce into a single peak at saturation. The energy spread in the electron beam widens markedly after saturation due to the number of electrons that transfer a significant amount of energy to the photon beam. Coherent transition radiation measurements of the electron beam as it strikes a foil provide additional confirmation of the microbunching of the electron beam. The quantities measured confirm that saturation was indeed reached. Details are given in Milton et al., Science 292, 2037 (2001) (also online at www.sciencexpress.org as 10.1126/science. 1059955, 17 May 2001), and Lewellen et al., "Present Status and Recent Results from the APS SASE FEL," to be published in the Proceedings of the 23rd International Free-Electron Laser Conference, Darmstadt, Germany, 20?24 August 2001.
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title: Investigations of electron-beam microbunching and beam coalignment using CTR in a high-gain SASE FEL
format: conference proceeding
conference: PAC 2001
year: 2001
11 authors: A. Lumpkin | W. Berg | S. Biedron | M. Borland | Y. C. Chae | R. Dejus | J. Lewellen | S. Milton | E. Moog | G. Travish | B. Yang
abstract: We recently extended our experiments on z-dependent electron-beam microbunching using coherent transition radiation (CTR) into the high-gain, self-amplified spontaneous emission free-electron laser (FEL) regime. The UV-visible FEL at the Advanced Photon Source was operated at 530 nm and 385 nm using the bunch-compressed photocathode gun electron beam, linac, and 21.6 m of undulator length. The longitudinal microbunching of the electron beam was tracked by inserting a metal foil and a mirror after each of the nine 2.4-m-long undulators. The visible CTR generated by the electron-beam interaction was imaged and analyzed for z-dependent intensity, angular distribution, and spot size. Additionally, the image centroids and structures were used in evaluating the critical electron beam/photon beam overlap issue as a complement to the trajectory data from the beam position monitors. (9 References).
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title: Exponential gain and saturation of a self-amplified spontaneous emission free-electron laser
format: journal article
publisher: Science
year: 2001
32 authors: S. V. Milton | E. Gluskin | N. D. Arnold | C. Benson | W. Berg | S. G. Biedron | M. Borland | Y. C. Chae | R. J. Dejus | P.K. Den Hartog | B. Deriy | M. Erdmann | Y. I. Eidelman | M. W. Hahne | Z. Huang | K. J. Kim | J. W. Lewellen | Y. Li | A. H. Lumpkin | O. Makarov | E. R. Moog | A. Nassiri | V. Sajaev | R. Soliday | B. J. Tieman | E. M. Trakhtenberg | G. Travish | I. B. Vasserman | G. Wiemerslage | B. X. Yang | N. A. Vinokurov | X. J. Wang
abstract: Self-amplified spontaneous emission in a free-electron laser has been proposed for the generation of very high brightness coherent X-rays. This process involves passing a high-energy, high-charge, short-pulse, low-energy-spread, and low-emittance electron beam through the periodic magnetic field of a long series of high-quality undulator magnets. The radiation produced grows exponentially in intensity until it reaches a saturation point. We report on the demonstration of self-amplified spontaneous emission gain, exponential growth, and saturation at visible (530 nanometers) and ultraviolet (385 nanometers) wavelengths. Good agreement between theory and simulation indicates that scaling to much shorter wavelengths may be possible. These results confirm the physics behind the self-amplified spontaneous emission process and forward the development of an operational X-ray free-electron laser. (30 References).
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title: Observation and analysis of self-amplified spontaneous emission at the APS low-energy undulator test line
format: conference proceeding
conference: FEL 2000 22nd
year: 2001
153 authors: N. D. Arnold | J. Attig | G. Banks | R. Bechtold | K. Beczek | C. Benson | S. Berg | W. Berg | S. G. Biedron | J. A. Biggs | M. Borland | K. Boerste | M. Bosek | W. R. Brzowski | J. Budz | J. A. Carwardine | P. Castro | Y. C. Chae | S. Christensen | C. Clark | M. Conde | E. A. Crosbie | G. A. Decker | R. J. Dejus | H. DeLeon | P. K. Den Hartog | B. N. Deriy | D. Dohan | P. Dombrowski | D. Donkers | C. L. Doose | R. J. Dortwegt | G. A. Edwards | Y. Eidelman | M. J. Erdmann | J. Error | R. Ferry | R. Flood | J. Forrestal | H. Freund | H. Friedsam | J. Gagliano | W. Gai | J. N. Galayda | R. Gerig | R. L. Gilmore | E. Gluskin | G. A. Goeppner | J. Goetzen | C. Gold | A. J. Gorski | A. E. Grelick | M. W. Hahne | S. Hanuska | K. C. Harkay | G. Harris | A. L. Hillman | R. Hogrefe | J. Hoyt | Z. Huang | J. M. Jagger | W. G. Jansma | M. Jaski | S. J. Jones | R. T. Keane | A. L. Kelly | C. Keyser | K. J. Kim | S. H. Kim | M. Kirshenbaum | J. H. Klick | K. Knoerzer | R. J. Koldenhoven | M. Knott | S. Labuda | R. Laird | J. Lang | F. Lenkszus | E. S. Lessner | J. W. Lewellen | Y. Li | R. M. Lill | A. H. Lumpkin | O. A. Makarov | G. M. Markovich | M. McDowell | W. P. McDowell | P. E. McNamara | T. Meier | D. Meyer | W. Michalek | S. V. Milton | H. Moe | E. R. Moog | L. Morrison | A. Nassiri | J. R. Noonan | R. Otto | J. Pace | S. J. Pasky | J. M. Penicka | A. F. Pietryla | G. Pile | C. Pitts | J. Power | T. Powers | C. C. Putnam | A. J. Puttkammer | D. Reigle | L. Reigle | D. Ronzhin | E. R. Rotela | E. F. Russell | V. Sajaev | S. Sarkar | J. C. Scapino | K. Schroeder | R. A. Seglem | N. S. Sereno | S. K. Sharma | J. F. Sidarous | O. Singh | T. L. Smith | R. Soliday | G. A. Sprau | S. J. Stein | B. Stejskal | V. Svirtun | L. C. Teng | E. Theres | M.C. Thompson | B. J. Tieman | J. A. Torres | E. M. Trakhtenberg | G. Travish | G. F. Trento | J. Vacca | I. B. Vasserman | N. A. Vinokurov | D. R. Walters | Wang, J. | X. J. Wang | J. Warren | S. Wesling | D. L. Weyer | G. Wiemerslage | K. Wilhelmi | R. Wright | D. Wyncott | S. Xu | B. X. Yang | W. Yoder | R. B. Zabel
abstract: Exponential growth of self-amplified spontaneous emission at 530 nm was first experimentally observed at the Advanced Photon Source low-energy undulator test line in December 1999. Since then, further detailed measurements and analysis of the results have been made. Here, we present the measurements and compare these with calculations based on measured electron beam properties and theoretical expectations. (31 References).
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title: Observation of self-amplified spontaneous emission and exponential growth at 530 nm
format: journal article
publisher: Physical Review Letters
year: 2000
50 authors: S. V. Milton | E. Gluskin | S. G. Biedron | R. J. Dejus | P. K. Den Hartog | J. N. Galayda | K. J. Kim | J. W. Lewellen | E. R. Moog | V. Sajaev | N. S. Sereno | G. Travish | N. A. Vinokurov | N. D. Arnold | C. Benson | W. Berg | J. A. Biggs | M. Borland | J. A. Carwardine | Y. C. Chae | G. Decker | B. N. Deriy | M. J. Erdmann | H. Friedsam | C. Gold | A. E. Grelick | M. W. Hahne | K. C. Harkay | Z. Huang | E. S. Lessner | R. M. Lill | A. H. Lumpkin | O. A. Makarov | G. M. Markovich | D. Meyer | A. Nassiri | J. R. Noonan | S. J. Pasky | G. Pile | T. L. Smith | R. Soliday | B. J. Tieman | E. M. Trakhtenberg | G. F. Trento | I. B. Vasserman | D. R. Walters | X. J. Wang | G. Wiemerslage | S. Xu | B. X. Yang
abstract: Experimental evidence for self-amplified spontaneous emission (SASE) at 530 nm is reported. The measurements were made at the low-energy undulator test line facility at the Advanced Photon Source, Argonne National Laboratory. The experimental setup and details of the experimental results are presented, as well as preliminary analysis. This experiment extends to shorter wavelengths the operational knowledge of a linac-based SASE free-electron laser and explicitly shows the predicted exponential growth in intensity of the optical pulse as a function of length along the undulator. (20 References).
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title: High-Brightness Beams from a Light Source Injector: The Advanced Photon Source Low-Energy Undulator Test Line Linac
format: conference proceeding
conference: Linear Accelerator Conference 2000
year: 2000
9 authors: G. Travish | S. Biedron | M. Borland | M. W. Hahne | K. C. Harkay | J. Lewellen | A. Lumpkin | S. Milton | N. S. Sereno
abstract: The use of existing linacs, and in particular light source injectors, for free-electron laser (FEL) experiments is becoming more common due to the desire to test FELs at ever shorter wavelengths. The high-brightness, highcurrent beams required by high gain FELs impose technical specifications that most existing linacs were not designed to meet. Moreover, the need for specialized diagnostics, especially shot-to-shot data acquisition, demands substantial modification and upgrade of conventional linacs. Improvements have been made to the Advanced Photon Source (APS) injector linac in order to produce and characterize high brightness beams. Specifically, effort has been directed at generating beams suitable for use in the low-energy undulator test line (LEUTL) FEL in support of fourth-generation light source research. The enhancements to the linac technical and diagnostic capabilities that allowed for self-amplified spontaneous emission (SASE) operation of the FEL at 530 nm are described. Recent results, including details on technical systems improvements and electron beam measurement techniques, will be discussed. The linac is capable of accelerating beams to over 650 MeV. The nominal FEL beam parameters used are as follows: 217 MeV energy; 0.1-0.2% rms energy spread; 4-8 um normalized rms emittance; 80-120 A peak current from a 0.2-0.7 nC charge at a 2-7 ps FWHM bunch.
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title: High-Brightness Beam Generation and Characterization at the Advanced Photon Source Low-Energy Undulator Test Line Linac
format: conference proceeding
conference: APS April Meeting
year: 2000
9 authors: J. Lewellen | S. Biedron | M. Borland | M. W. Hahne | K. C. Harkay | A. Lumpkin | S. Milton | N. S. Sereno | G. Travish
abstract: Improvements to the Advanced Photon Source injector linac have been made to allow for the production and characterization of high-brightness beams in support of fourth-generation light source research. In particular, effort has been directed at generating beams suitable for use in the low-energy undulator test line (LEUTL) free-electron laser (FEL). We describe the enhancements to the linac operational and diagnostic capabilities that enabled self-amplified spontaneous emission (SASE) operation of the FEL at 530 nm. Electron beam measurement techniques and recent results will be discussed. Beam properties are measured under the same operational conditions as those used for FEL studies. The nominal FEL beam parameters are as follows: 217 MeV beam energy; less than 0.15 mm-mrad normalized emittance; 100 A peak current from a 0.7-nC charge at a 7-psec bunch.
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