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S. Biedron

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Last Name: Biedron

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13 papers
title: Status of the Fermi@Elettra Photoinjector
format: conference proceeding
conference: EPAC 2008
year: 2008
21 authors: M. Trovo | L. Badano | S. Biedron | D. Castronovo | F. Cianciosi | P. Craievich | M.D. Danailov | G.D’Auria | M. Ferianis | S.V. Milton | G. Penco | L. Pivetta | L. Rumiz | D. Wang | M. Eriksson | D. Kumbaro | F. Lindau | H. Badakov | A. Fukasawa | B. O'Shea | J.B. Rosenzweig
abstract: The new FERMI@Elettra photoinjector is presently undergoing high-power testing and characterization at MAXlab in Lund, Sweden. This effort is a collaboration between Sincrotrone Trieste, MAX-lab and UCLA. The 1.6-cell RF gun cavity and the focusing solenoid were successfully designed and built by the Particle Beam Physics Laboratory at UCLA, delivered to Sincrotrone Trieste at the beginning of 2008, and installed in the linac tunnel at MAX-lab. Use of the MAX-lab facility will allow the FERMI project to progress significantly with the photoinjector while waiting for the completion of the new linac building extension at Sincrotrone Trieste. We report here on the high-power conditioning of the RF cavity and the first beam tests.
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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: 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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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: 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: Multi-dimensional free-electron laser simulation codes: a comparison study
format: conference proceeding
conference: FEL 1999 21st
year: 2000
8 authors: S. G. Biedron | Y. C. Chae | R. J. Dejus | B. Faatz | H. P. Freund | S. V. Milton | H. D. Nuhn | Sven Reiche
abstract: A self-amplified spontaneous emission (SASE) free-electron laser(FEL) is under construction at the Advanced Photon Source (APS). Five FEL simulation codes were used in the design phase: GENESIS, GINGER, MEDUSA, RON, and TDA3D. Initial comparisons between each of these independent formulations show good agreement for the parameters of the APS SASE FEL.
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title: The APS SASE FEL: Modeling and code comparison
format: conference proceeding
conference: PAC 1999
year: 1999
8 authors: S. G. Biedron | Y. C. Chae | R. J. Dejus | B. Faatz | H. P. Freund | S. Milton | H. D. Nuhn | Sven Reiche
abstract: A self-amplified spontaneous emission (SASE) free electron laser (FEL) is under construction at the Advanced Photon Source (APS). Five FEL simulation codes were used in the design phase: GENESIS, GINGER, MEDUSA, RON, and TDA3D. Initial comparisons between each of these independent formulations show good agreement for the parameters of the APS SASE FEL.
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title: The APS SASE FEL: status and commissioning results
format: conference proceeding
conference: PAC 1999
year: 1999
7 authors: S. V. Milton | S. G. Biedron | P. Den Hartog | J. W. Lewellen | E. Moog | A. Nassiri | G. Travish
abstract: A self-amplified spontaneous emission (SASE) free-electron laser (FEL) is under construction at the Advanced Photon Source (APS). Three gun systems, an rf-test area, laser room, numerous diagnostics, a transfer line at the end of the linac and a new building, which will serve as the experimental hall, have been added. The only remaining items to be installed are the undulators into the beamline. Here, the additions to the APS in support of this project as well as commissioning results and future plans will be discussed. (9 References).
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title: The operation of the BNL/ATF GUN-IV photocathode RF gun at the Advanced Photon Source
format: conference proceeding
conference: PAC 1999
year: 1999
18 authors: S. G. Biedron | G. A. Goeppner | J. W. Lewellen | S. V. Milton | A. Nassiri | G. Travish | X. J. Wang | N. D. Arnold | W. J. Berg | M. Babzien | C. L. Doose | R. J. Dortwegt | A. Grelick | J. N. Galayda | G. M. Markovich | S. J. Pasky | J. G. Power | B. X. Yang
abstract: At the Advanced Photon Source (APS) at Argonne National Laboratory (ANL), a free-electron laser (FEL) based on the self-amplified spontaneous emission (SASE) process is nearing completion. Recently, an RF photoinjector gun system was made available to the APS by Brookhaven National Laboratory/Accelerator Test Facility (BNL/ATF). It will be used to provide the high-brightness, low-emittance, and low-energy spread electron beam required by the SASE FEL theory. A Nd:Glass laser system, capable of producing a maximum of 500 mu J of UV in a 1-10 ps pulse at up to a 10-Hz repetition rate, serves as the photoinjector's drive laser. Here, the design, commissioning, and integration of this gun with the APS are discussed. (8 References).
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title: Operation of the APS RF Gun
format: conference proceeding
conference: Linear Accelerator Conference 1998
year: 1998
8 authors: J. W. Lewellen | S. Biedron | A. Lumpkin | S. V. Milton | A. Nassiri | S. Pasky | G. Travish | M. White
abstract: The Advanced Photon Source (APS) has a thermioniccathode rf gun system capable of providing beam to the APS linac. The gun system consists of a 1.6-cell thermionic-cathode rf gun, a fast kicker for beam current control, and an alpha magnet for bunch compression and injection into the APS linac line. This system is intended for use both as an injector for positron creation, and as a first beam source for the Low-Energy Undulator Test Line (LEUTL) project [1]. The first measured performance characteristics of the gun are presented.
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