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Intra-undulator measurements at VISA FEL

Description: We describe a diagnostics system developed, to measure exponential gain properties and the electron beam dynamics inside the strong focusing 4-m long undulator for the VISA (Visible to Infrared SASE Amplifier) FEL. The technical challenges included working inside the small undulator gap, optimizing the electron beam diagnostics in the high background environment of the spontaneous undulator radiation, multiplexing and transporting the photon beam. Initial results are discussed.
Date: August 10, 2000
Creator: Murokh, A.; Frigola, P.; Pellegrini, C.; Rosenzweig, J.; Tremaine, A.; Johnson, E. et al.
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Partner: UNT Libraries Government Documents Department
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STELLA-II: DEMONSTRATION OF MONOENERGETIC LASER ACCELERATION.

Description: Monoenergetic laser acceleration of trapped microbunches has been demonstrated for the first time. An inverse free electron laser (IFEL) is used to create microbunches, which are then accelerated by a second IFEL using a tapered undulatos. An adjustable magnetic field chicane is located between the two IFELs and is used to control the phase of the microbunches with respect to the laser field in the second IFEL. The IFELs are driven by a single lases beam from a high peak power CO{sub 2} laser. … more
Date: March 24, 2004
Creator: KIMURA,W. D. BABZIEN,M. BEN-ZVI,I. GALLARDO,J. C. KUSCHE,K. P. POGORELSKY,I. V. SKARITKA,J. YAKIMENKO,V. ET AL.
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Partner: UNT Libraries Government Documents Department
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Recent Progress in Emittance Control of the Photoelectron Beam Using Transverse Laser Shape Modulation and Tomography Technique.

Description: A low emittance beam is very important for many applications, such as short-wavelength Free-Electron Lasers. A diagnostic that provides detailed information on the density distribution of the electron bunch in multi-dimensional phase-space is an essential tool for obtaining small emittance at a reasonable charge. Accurate phase space reconstruction and an analysis using a transport line with nine focusing magnets and techniques to control the optical functions and phases was demonstrated in pre… more
Date: March 29, 1999
Creator: Babzien,M.; Ben-Zvi, Ilan; Malone,R.; Wang,X. J. & Yakimenko,V.
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Partner: UNT Libraries Government Documents Department
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EXPERIMENTAL RESULTS FROM A MICROWAVE CAVITY BEAM POSITION MONITOR.

Description: Future Linear Colliders have hard requirements for the beam transverse position stability in the accelerator. A beam Position Monitor (BPM) with the resolution better than 0.1 micron in the single bunch regime is needed to control the stability of the beam position along the linac. Proposed BPM is based on the measurement of the asymmetrical mode excited by single bunch in the cavity. Four stages of signal processing (space-, time-, frequency- and phase-filtering providing the required signal-t… more
Date: March 29, 1999
Creator: Balakin, V.; Bazhan, A.; Lunev, P.; Solyak, N.; Vogel, V.; Zhogolev, P. et al.
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Partner: UNT Libraries Government Documents Department
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Ultra-Bright X-Ray Generation Using Inverse Compton Scattering of Picosecond CO(2) Laser Pulses.

Description: Laser-Compton scattering with picosecond CO{sub 2} laser pulses is proposed for generation of high-brightness x-rays. The interaction chamber has been developed and the experiment is scheduled for the generation of the x-rays of 4.7 keV, 10{sup 7} photons in 10-ps pulse width using 50-MeV, 0.5-nC relativistic electron bunches and 6 GW CO{sub 2} laser.
Date: March 1, 1999
Creator: Tsunemi, A.; Endo, A.; Pogorelsky, I.; Ben-Zvi, Ilan; Kusche, K.; Skaritka, J. et al.
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Partner: UNT Libraries Government Documents Department
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Progress on Stella Experiment.

Description: Progress is reported on the Staged Electron Laser Acceleration (STELLA) experiment, which has been assembled on the BNL Accelerator Test Facility (ATF). The primary goal of STELLA is to demonstrate staging of the laser acceleration process by using the BNL inverse free electron laser (IFEL) as a prebuncher, which generates {approx} 1-{micro}m long microbunches, and accelerating these microbunches using an inverse Cerenkov acceleration (ICA) stage. Experimental runs are underway to recommission … more
Date: March 1, 1999
Creator: Kimura, W. D.; Campbell, L. P.; Gottschalk, S. C.; Quimby, D. C.; Robinson, K. E.; Steinhauer, L. C. et al.
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Partner: UNT Libraries Government Documents Department
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Experiment on suppression of spontaneous undulator radiation at ATF

Description: We propose undertaking a demonstration experiment on suppressing spontaneous undulator radiation from an electron beam at BNL's Accelerator Test Facility (ATF). We describe the method, the proposed layout, and a possible schedule. There are several advantages in strongly suppressing shot noise in the electron beam, and the corresponding spontaneous radiation. The self-amplified spontaneous (SASE) emission originating from shot noise in the electron beam is the main source of noise in high-gain … more
Date: August 23, 2009
Creator: Litvinenko,V. & Yakimenko, V.
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Partner: UNT Libraries Government Documents Department
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Experimental Characterization of the Transverse Phase Space of a 60-MeV Electron Beam Through a Compressor Chicane

Description: Space charge and coherent synchrotron radiation may deteriorate electron beam quality when the beam passes through a magnetic bunch compressor. This paper presents the transverse phase-space tomographic measurements for a compressed beam at 60 MeV, around which energy the first stage of magnetic bunch compression takes place in most advanced linacs. Transverse phase-space bifurcation of a compressed beam is observed at that energy, but the degree of the space charge-induced bifurcation is appre… more
Date: February 12, 2007
Creator: Zhou, F.; Kabel, A.; Rosenzweig, J.; Agustsson, R.; Andonian, G.; Cline, D. et al.
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Partner: UNT Libraries Government Documents Department
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Coherent electron cooling demonstration experiment

Description: Coherent electron cooling (CEC) has a potential to significantly boost luminosity of high-energy, high-intensity hadron-hadron and electron-hadron colliders. In a CEC system, a hadron beam interacts with a cooling electron beam. A perturbation of the electron density caused by ions is amplified and fed back to the ions to reduce the energy spread and the emittance of the ion beam. To demonstrate the feasibility of CEC we propose a proof-of-principle experiment at RHIC using SRF linac. In this p… more
Date: September 4, 2011
Creator: Litvinenko, V. N.; Belomestnykh, S.; Ben-Zvi, Ilan; Brutus, J. C.; Fedotov, A.; Hao, Y. et al.
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Partner: UNT Libraries Government Documents Department
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Emittance Studies of the BNL/SLAC/UCLA 1.6 Cell Photocathode RF Gun

Description: The symmetrized 1.6 cell S-band photocathode gun developed by the BNL/SLAC/UCLA collaboration is in operation at the Brookhaven Accelerator Test Facility (ATF). A novel emittance compensation solenoid magnet has also been designed, built and is in operation at the ATF. These two subsystems form an emittance compensated photoinjector used for beam dynamics, advanced acceleration and free electron laser experiments at the ATF. The highest acceleration field achieved on the copper cathode is 150 M… more
Date: September 9, 2011
Creator: Palmer, D. T.; Wang, X. J.; Miller, R. H.; Babzien, M.; Ben-Zvi, Ilan; Pellegrini, C. et al.
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Partner: UNT Libraries Government Documents Department
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Proof-of-principle experiment for FEL-based coherent electron cooling

Description: Coherent electron cooling (CEC) has a potential to significantly boost luminosity of high-energy, high-intensity hadron-hadron and electron-hadron colliders. In a CEC system, a hadron beam interacts with a cooling electron beam. A perturbation of the electron density caused by ions is amplified and fed back to the ions to reduce the energy spread and the emittance of the ion beam. To demonstrate the feasibility of CEC we propose a proof-of-principle experiment at RHIC using SRF linac. In this p… more
Date: August 21, 2011
Creator: Litvinenko, V. N.; Belomestnykh, S.; Ben-Zvi, Ilan; Brutus, J. C.; Fedotov, A.; Hao, Y. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Status of Proof-of-principle Experiment for Coherent Electron Cooling

Description: Coherent electron cooling (CEC) has a potential to significantly boost luminosity of high-energy, high-intensity hadron colliders. To verify the concept we conduct proof-of-the-principle experiment at RHIC. In this paper, we describe the current experimental setup to be installed into 2 o'clock RHIC interaction regions. We present current design, status of equipment acquisition and estimates for the expected beam parameters.
Date: July 1, 2012
Creator: Pinayev, I.; Ben-Zvi, Ilan; Bengtsson, J.; Elizarov, A.; Fedotov, A. V.; Gassner, D. M. et al.
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Partner: UNT Libraries Government Documents Department
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Atto Second Electron Beams Generation and Characterization Experiment at the Accelerator Test Facility.

Description: We are proposing an Atto-second electron beam generation and diagnostics experiment at the Brookhaven Accelerator Test facility (ATF) using 1 {micro}m Inverse Free Electron Laser (IFEL). The proposed experiment will be carried out by an BNL/LBNL collaboration, and it will be installed at the ATF beam line II. The proposed experiment will employ a one-meter long undulator with 1.8 cm period (VISA undulator). The electron beam energy will be 63 MeV with emittance less than 2 mm-mrad and energy sp… more
Date: February 1, 2002
Creator: Zolotorev, M.; Zholents, A.; Wang, X. J.; Babzien, M.; Skaritka, J.; Rakowsky, G. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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First Demonstration of Staged Laser Acceleration.

Description: Two independently-driven laser accelerators were operated together in series for the first time in a proof-of-principle experiment to demonstrate staging. The ability to stage together these devices is important for eventually building practical laser-driven accelerators. The laser accelerators consisted of two identical inverse free electron lasers (IFEL), where the first IFEL served as a prebuncher, which created {approx}3-fs long microbunches that were accelerated by the second IFEL. Precise… more
Date: June 18, 2001
Creator: Kimura, W. D.; Campbell, L. P.; Dilley, C. E.; Gottschalk, S. C.; Quimby, D. C.; Babzien, M. Ben-Zvi, I. et al.
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Partner: UNT Libraries Government Documents Department
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Reaching Ultra High Peak Characteristics in Relativistic Thomson Backscattering

Description: The concept of x-ray laser synchrotron sources (LSS) based on Thomson scattering between laser photons and relativistic electrons leads to future femtosecond light-source facilities fit to multidisciplinary research in ultra-fast structural dynamics. Enticed by these prospects, the Brookhaven Accelerator Test Facility (ATF) embarked into development of the LSS based on a combination of a photocathode RF linac and a picosecond CO{sub 2} laser. We observed the record 1.7 x 10{sup 8} x-ray photons… more
Date: November 29, 2001
Creator: Pogorelsky, I. V.; Ben-Zvi, Ilan; Hirose, T.; Kashiwagi, S.; Yakimenko, V.; Kusche, K. et al.
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Partner: UNT Libraries Government Documents Department
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Primary Tests of Laser/E Beam Interaction in a Plasma Channel

Description: A high-energy CO{sub 2} laser is channeled in a capillary discharge. Plasma dynamic simulations confirm occurrence of guiding conditions at the relatively low axial plasma density 1 {divided_by} 4 x 10{sup 17} cm{sup -3}. A relativistic electron beam transmitted through the capillary changes its properties depending upon the plasma density. We observe focusing, defocusing or steering of the e-beam. Counter-propagation of the electron and laser beams in the plasma channel results in generation o… more
Date: June 23, 2002
Creator: Pogorelsky, I. V.; Ben-Zvi, Ilan; Hirose, T.; Yakimenko, V.; Kusche, K.; Siddons, P. et al.
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Partner: UNT Libraries Government Documents Department
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Relativistic Thomson Scattering Experiment at BNL - Status Report

Description: 1.7 x 10{sup 8} x-ray photons per 3.5 ps pulse have been produced in Thomson scattering by focusing CO{sub 2} laser pulse on counter-propagating relativistic electron beam. We explore a possibility of further enhancement of process efficiency by propagating both beams in a plasma capillary. Conventional synchrotron light sources based on using giga-electron-volt electron synchrotron accelerators and magnetic wigglers generate x-ray radiation for versatile application in multi-disciplinary resea… more
Date: December 3, 2001
Creator: Pogorelsky, I. V.; Ben-Zvi, Ilan; Kusche, K.; Siddons, P.; Yakimenko, V.; Hirose, T. et al.
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Partner: UNT Libraries Government Documents Department
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Counter Propagation of Electron and CO2 Laser Beams in a Plasma Channel

Description: A high-energy CO{sub 2} laser is channeled in a capillary discharge. Occurrence of guiding conditions at a relatively low plasma density (<10{sup 18} cm{sup -3}) is confirmed by MHD simulations. Divergence of relativistic electron beam changes depending on the plasma density. Counter-propagation of the electron and laser beams inside the plasma channel results in intense x-ray generation.
Date: November 12, 2002
Creator: Hirose, T.; Pogorelsky, I. V.; Ben-Zvi, Ilan; Yakimenko, V.; Kusche, K.; Siddons, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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