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Development Of An X Band Photoinjector At Slac
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Book Synopsis Development of an X-band Photoinjector at SLAC. by :
Download or read book Development of an X-band Photoinjector at SLAC. written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of a National Cancer Institute contract to develop a compact source of monoenergetic X-rays via Compton backscattering, we have completed the design and construction of a 5.5 cell Photoinjector operating at 11.424 GHz. Successful completion of this project will result in the capability of generating a monoenergetic X-ray beam, continuously tunable from 20 - 85 KeV. The immediate goal is the development of a Photoinjector producing 7 MeV, 0.5nC, sub-picosecond electron bunches with normalized RMS emittances of>1 p-mm-mR at repetition rates up to 60 Hz. This beam will then be further accelerated to 60 MeV using a 1.05 m accelerating structure. This Photoinjector is somewhat different than the traditional 1.5 cell design both because of the number of cells and the symmetrically fed input coupler cell. Its operating frequency is also unique. Since the cathode is non-removable, cold-test tuning was somewhat more difficult than in other designs. We will present results of ''bead-drop'' measurements used in tuning this structure. Initial beam measurements are currently in progress and results will be presented as well as results of RF conditioning to high gradients at X-band. Details of the RF system, emittance-compensating solenoid, and cathode laser system as well as PARMELA simulations will also be presented.
Book Synopsis X-Band Photoinjector Beam Dynamics by :
Download or read book X-Band Photoinjector Beam Dynamics written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: SLAC is studying the feasibility of using an X-band RF photocathode gun to produce low emittance bunches for applications such as a mono-energetic MeV [gamma] ray source (in collaboration with LLNL) and a photoinjector for a compact FEL. Beam dynamics studies are being done for a configuration consisting of a 5.5-cell X-band gun followed by several 53-cell high-gradient X-band accelerator structures. A fully 3D program, ImpactT, is used to track particles taking into account space charge forces, short-range longitudinal and transverse wakefields, and the 3D rf fields in the structures, including the quadrupole component of the couplers. The effect of misalignments of the various elements, including the drive-laser, gun, solenoid and accelerator structures, are evaluated. This paper presents these results and estimates of the expected bunch emittance vs cathode gradient, and the effects of mixing between the fundamental and off-frequency longitudinal modes. An X-band gun at SLAC has been shown to operate reliably with a 200 MV/m acceleration gradient at the cathode, which is nearly twice the 115 MV/m acceleration gradient in the LCLS gun. The higher gradient should roughly balance the space charge related transverse emittance growth for the same bunch charge but provide a 3-4 times shorter bunch length. The shorter length would make the subsequent bunch compression easier and allow for a more effective use of emittance exchange. Such a gun can also be used with an X-band linac to produce a compact FEL or g ray source that would require rf sources of only one frequency for beam generation and acceleration. The feasibility of using an X-band rf photocathode gun and accelerator structures to generate high quality electron beams for compact FELs and g ray sources is being studied at SLAC. Results from the X-band photoinjector beam dynamics studies are reported in this paper.
Book Synopsis High Energy Density and High Power RF by : David K. Abe
Download or read book High Energy Density and High Power RF written by David K. Abe and published by Springer Science & Business Media. This book was released on 2006-01-04 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the seventh in a series of international workshops on high-power and high-energy density microwave devices for accelerator, plasma physics, and defense applications. The scope of this workshop included accelerators for high energy physics, plasma heating and current drive in controlled thermonuclear fusion research, radar and directed energy/high power microwave systems, THz sources and technologies, and advanced 2D/3D computational tool development.
Book Synopsis Femtosecond Laser Clocked Compact X-band High Gradient Photoinjector and Accelerator for Compton Scattering by : Christopher A. DeStefano
Download or read book Femtosecond Laser Clocked Compact X-band High Gradient Photoinjector and Accelerator for Compton Scattering written by Christopher A. DeStefano and published by . This book was released on 2008 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling Multi-Bunch X-band Photoinjector Challenges by :
Download or read book Modeling Multi-Bunch X-band Photoinjector Challenges written by and published by . This book was released on 2012 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: An X-band test station is being developed at LLNL to investigate accelerator optimization for future upgrades to mono-energetic gamma-ray technology at LLNL. The test station will consist of a 5.5 cell X-band rf photoinjector, single accelerator section, and beam diagnostics. Of critical import to the functioning of the LLNL X-band system with multiple electron bunches is the performance of the photoinjector. In depth modeling of the Mark 1 LLNL/SLAC X-band rf photoinjector performance will be presented addressing important challenges that must be addressed in order to fabricate a multi-bunch Mark 2 photoinjector. Emittance performance is evaluated under different nominal electron bunch parameters using electrostatic codes such as PARMELA. Wake potential is analyzed using electromagnetic time domain simulations using the ACE3P code T3P. Plans for multi-bunch experiments and implementation of photoinjector advances for the Mark 2 design will also be discussed.
Book Synopsis X-band RF Photoinjector for Laser Compton X-ray and Gamma-ray Sources by :
Download or read book X-band RF Photoinjector for Laser Compton X-ray and Gamma-ray Sources written by and published by . This book was released on 2015 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extremely bright narrow bandwidth gamma-ray sources are expanding the application of accelerator technology and light sources in new directions. An X-band test station has been commissioned at LLNL to develop multi-bunch electron beams. This multi-bunch mode will have stringent requirements for the electron bunch properties including low emittance and energy spread, but across multiple bunches. The test station is a unique facility featuring a 200 MV/m 5.59 cell X-band photogun powered by a SLAC XL4 klystron driven by a Scandinova solid-state modulator. This paper focuses on its current status including the generation and initial characterization of first electron beam. Design and installation of the inverse-Compton scattering interaction region and upgrade paths will be discussed along with future applications.
Book Synopsis 50 MW X-BAND RF SYSTEM FOR A PHOTOINJECTOR TEST STATION AT LLNL by :
Download or read book 50 MW X-BAND RF SYSTEM FOR A PHOTOINJECTOR TEST STATION AT LLNL written by and published by . This book was released on 2011 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: In support of X-band photoinjector development efforts at LLNL, a 50 MW test station is being constructed to investigate structure and photocathode optimization for future upgrades. A SLAC XL-4 klystron capable of generating 50 MW, 1.5 microsecond pulses will be the high power RF source for the system. Timing of the laser pulse on the photocathode with the applied RF field places very stringent requirements on phase jitter and drift. To achieve these requirements, the klystron will be powered by a state of the art, solid-state, high voltage modulator. The 50 MW will be divided between the photoinjector and a traveling wave accelerator section. A high power phase shifter is located between the photoinjector and accelerator section to adjust the phasing of the electron bunches with respect to the accelerating field. A variable attenuator is included on the input of the photoinjector. The distribution system including the various x-band components is being designed and constructed. In this paper, we will present the design, layout, and status of the RF system.
Book Synopsis Recent Measurements And Plans for the SLAC Compton X-Ray Source by : D. Martin
Download or read book Recent Measurements And Plans for the SLAC Compton X-Ray Source written by D. Martin and published by . This book was released on 2006 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: A compact source of monoenergetic X-rays, generated via Compton backscattering, has been developed in a collaboration between U.C Davis and SLAC. The source consists of a 5.5 cell X-band photoinjector, a 1.05 m long high gradient accelerator structure and an interaction chamber where a high power (TW), short pulse (sub-ps) infrared laser beam is brought into a nearly head-on collision with a high quality focused electron beam. Successful completion of this project will result in the capability of generating a monoenergetic X-ray beam, continuously tunable from 20 - 85 keV. We have completed a series of measurements leading up to the generation of monoenergetic X-rays. Measurements of essential electron beam parameters and the techniques used in establishing electron/photon collisions will be presented. We discuss the design of an improved interaction chamber, future electro-optic experiments using this chamber and plans for expanding the overall program to the generation of Terahertz radiation.
Book Synopsis High Energy Density and High Power RF by : Steven H. Gold
Download or read book High Energy Density and High Power RF written by Steven H. Gold and published by American Inst. of Physics. This book was released on 2003-12-04 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the sixth in a series of international workshops on high-power and high-energy density microwave devices for accelerator, plasma physics, and defense applications. Past workshops were held in Dubna, Montauk, Hayama, Pajaro Dunes, and Snowbird. The theme is research and development of techniques to increase microwave energy density and peak power in active and passive microwave devices and components ranging from L-band to W-band. The scope of this workshop has now been broadened to include radar and high power microwave (HPM) systems, space exploration, neutron sources, and even plasma heating and current drive in controlled thermonuclear fusion research.
Book Synopsis Structural Dynamics with X-ray and Electron Scattering by : Kasra Amini
Download or read book Structural Dynamics with X-ray and Electron Scattering written by Kasra Amini and published by Royal Society of Chemistry. This book was released on 2023-12-20 with total page 567 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the early 20th century, X-ray and electron scattering has provided a powerful means by which the location of atoms can be identified in gas-phase molecules and condensed matter with sub-atomic spatial resolution. Scattering techniques can also provide valuable observables of the fundamental properties of electrons in matter such as an electron’s spin and its energy. In recent years, significant technological developments in both X-ray and electron scattering have paved the way to time-resolved analogues capable of capturing real-time snapshots of transient structures undergoing a photochemical reaction. Structural Dynamics with X-ray and Electron Scattering is a two-part book that firstly introduces the fundamental background to scattering theory and photochemical phenomena of interest. The second part discusses the latest advances and research results from the application of ultrafast scattering techniques to imaging the structure and dynamics of gas-phase molecules and condensed matter. This book aims to provide a unifying platform for X-ray and electron scattering.
Download or read book Epac 96 written by S. Myers and published by CRC Press. This book was released on 1996-01-01 with total page 1054 pages. Available in PDF, EPUB and Kindle. Book excerpt: EPAC 96; Proceedings of the Fifth European Particle Accelerator Conference, Sitges (Barcelona), 10 to 14 June 1996, Three Volume Set, also available on a CD-ROM, provides a comprehensive overview of research, technology, and special applications in the field of accelerators. It serves as a source for novel ideas and familiarizes researchers with advanced concepts.
Book Synopsis Monochromatic X-ray Cancer Phototherapy and Characterization of the Compton Light Source by : William James Frederick
Download or read book Monochromatic X-ray Cancer Phototherapy and Characterization of the Compton Light Source written by William James Frederick and published by . This book was released on 2008 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Physics and Applications of High Brightness Electron Beams by : Luigi Palumbo
Download or read book The Physics and Applications of High Brightness Electron Beams written by Luigi Palumbo and published by World Scientific. This book was released on 2007 with total page 729 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings comprise cutting-edge contributions by researchers at the frontiers of beam physics, free-electron-based light sources, and advanced accelerators. It represents a snap-shot of activity in these fields at a critical historical juncture, where rapid experimental progress is being reported, and new facilities such as X-ray free-electron lasers are under construction. The volume features invited contributions from leading researchers from the international beam physics community that summarize the state-of-the-art research in individual topics, as well as timely contributions from participants that arose during the workshop itself.
Book Synopsis Physics And Applications Of High Brightness Electron Beams, The - Proceedings Of The 46th Workshop Of The Infn Eloisatron Project by : Luigi Palumbo
Download or read book Physics And Applications Of High Brightness Electron Beams, The - Proceedings Of The 46th Workshop Of The Infn Eloisatron Project written by Luigi Palumbo and published by World Scientific. This book was released on 2007-09-27 with total page 729 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings comprise cutting-edge contributions by researchers at the frontiers of beam physics, free-electron-based light sources, and advanced accelerators. It represents a snap-shot of activity in these fields at a critical historical juncture, where rapid experimental progress is being reported, and new facilities such as X-ray free-electron lasers are under construction. The volume features invited contributions from leading researchers from the international beam physics community that summarize the state-of-the-art research in individual topics, as well as timely contributions from participants that arose during the workshop itself.
Book Synopsis A Compact Compton Scattering X-ray Source for Cancer Detection, Diagnosis, and Treatment by : Eric Carl Landahl
Download or read book A Compact Compton Scattering X-ray Source for Cancer Detection, Diagnosis, and Treatment written by Eric Carl Landahl and published by . This book was released on 2002 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Power RF System for a High Brightness X-band Photoinjector Electron Source by : Lisa Leanne Laurent
Download or read book High Power RF System for a High Brightness X-band Photoinjector Electron Source written by Lisa Leanne Laurent and published by . This book was released on 1997 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Commissioning Results of the Next Generation Photoinjector by :
Download or read book Commissioning Results of the Next Generation Photoinjector written by and published by . This book was released on 1996 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Next Generation Photoinjector (NGP) developed by the BNL SLAC / UCLA collaboration was installed at the Brookhaven National Laboratories Accelerator Test Facility (ATF). The commissioning results and performance of the photocathode injector are present. The Next Generation Photoinjector consists of the symmetrized BNL/SLAC/UCLA 1.6 cell S-band Photocathode RF gun and a single solenoidal magnet for transverse emittance compensation. The highest acceleration field achieved on the cathode is 150 m V, and the RF guns normal operating field is 130 MV/m. The quantum efficiency of the copper cathode was measured to be 4.5 x 10−5'. The transverse emittance and bunch length of the photoelectron beam were measured. The optimized rms normalized emittance for a charge of 300 pC is 0.77 [pi] mm mrad. The bunch length dependency of photoelectron beam on the RF gun phase and acceleration fields were experimentally investigated.
