Author: Murokh, A.Y.
Paper Title Page
MOPPP086 Praseodymium Iron-Boron Undulator With Textured Dysprosium Poles for Compact X-Ray FEL Applications 756
 
  • R.B. Agustsson, Y.C. Chen, T.J. Grandsaert, A.Y. Murokh
    RadiaBeam, Santa Monica, USA
  • F.H. O'Shea
    UCLA, Los Angeles, California, USA
  • V. Solovyov
    BNL, Upton, Long Island, New York, USA
 
  Funding: DOE SBIR #97134S11-I
Radiabeam Technologies is developing a novel ultra-high field short period undulator using two unconventional materials: praseodymium permanent magnets (PrFeB) and textured dysprosium (Tx Dy) ferromagnetic field concentrators. Both materials exhibit extraordinary magnetic properties at cryogenic temperatures, such as very large energy product and record high induction saturation, respectively. The proposed device combines PrFeB and Tx Dy in 3-D hybrid undulator geometry with sub-cm period and up to 3 Tesla pole tip field. Practical realization of these features will significantly surpass state-of-the-art and offer an ideal solution for the next generation of compact X-ray light sources. Initial simulations along with preliminary cryogenic measurements will be presented.
 
 
MOPPR090 Progress Report on Development of a High Resolution Transverse Diagnostic based on Fiber Optics 996
 
  • R. Tikhoplav, R.B. Agustsson, G. Andonian, A.Y. Murokh, S. Wu
    RadiaBeam, Santa Monica, USA
  • R.K. Li, P. Musumeci, C.M. Scoby
    UCLA, Los Angeles, California, USA
 
  A beam profile monitor utilizing the technological advances in fiber optic manufacturing to obtain micron level resolution is under development at RadiaBeam Technologies. This fiber-optic profiling device would provide a low cost, turn-key solution with nominal operational supervision and requires minimal beamline real estate. Preliminary results of Cherenkov light generation in fiber is presented.  
 
TUPPD081 Development of Carbon NanoTube (CNT) Cathodes at RadiaBeam 1590
 
  • L. Faillace, R.B. Agustsson, S. Boucher, A.Y. Murokh, A.V. Smirnov
    RadiaBeam, Santa Monica, USA
 
  RadiaBeam is developing Carbon Nanotube (CNT) cathodes for DC-pulsed and radio frequency (RF) driven electron sources. CNT cathodes, if realized, are capable of producing very high current density with low thermal emittance, due to ambient operating temperature. The initial experimental results of CNT cathodes are presented, including the high-voltage tests, and life time studies. CNT cathodes potential applications in accelerator science and microwave industry are discussed, and near term plans to test the CNT cathodes in the RF environment are presented.  
 
WEPPP015 Generation and Characterization of 5-micron Electron Beam for Probing Optical Scale Structures 2753
 
  • M.G. Fedurin, M. Babzien, V. Yakimenko
    BNL, Upton, Long Island, New York, USA
  • B.A. Allen
    USC, Los Angeles, California, USA
  • P. Muggli
    MPI, Muenchen, Germany
  • A.Y. Murokh
    RadiaBeam, Santa Monica, USA
 
  In recent years advanced acceleration technologies have progress toward combination of electron beam, laser and optical scale dielectric structures. In present paper described generation of the electron beam probe with parameters satisfied to perform test of such optical structures.  
 
WEPPP040 Progress Report on Development of Novel Ultrafast Mid-IR Laser System 2810
 
  • R. Tikhoplav, A.Y. Murokh
    RadiaBeam, Santa Monica, USA
  • I. Jovanovic
    Penn State University, University Park, Pennsylvania, USA
 
  Finding alternate acceleration mechanisms that can provide very high gradients is of particular interest to the accelerator community. Those mechanisms are often based on either dielectric laser acceleration or laser wakefield acceleration techniques, which would greatly benefit from mid-IR ultrafast high peak power laser systems. The approach of this proposed work is to design a novel ultrafast mid-IR laser system based on optical parametric chirped-pulse amplification (OPCPA). OPCPA is a technique ideally suited for production of ultrashort laser pulses at the center wavelength of 2μm-5μm. Some of the key features of OPCPA are the wavelength agility, broad spectral bandwidth and negligible thermal load. This paper reports on the progress of the development of the ultrafast mid-IR laser system.  
 
THEPPB008 Inverse Compton Scattering Experiment in a Bunch Train Regime Using Nonlinear Optical Cavity 3245
 
  • A.Y. Murokh, R.B. Agustsson, S. Boucher, P. Frigola, T. Hodgetts, A.G. Ovodenko, M. Ruelas, R. Tikhoplav
    RadiaBeam, Santa Monica, USA
  • M. Babzien, M.G. Fedurin, T.V. Shaftan, V. Yakimenko
    BNL, Upton, Long Island, New York, USA
  • I. Jovanovic
    Penn State University, University Park, Pennsylvania, USA
 
  Inverse Compton Scattering (ICS) is a promising approach towards achieving high intensity, directional beams of quasi-monochromatic gammas, which could offer unique capabilities in research, medical and security applications. Practicality implementation of ICS sources, however, depends on the ability to achieve high peak brightness (~0.1-1.0 ICS photons per interacting electron), while increasing electron-laser beam interaction rate to about 10,000 cps. We discuss the results of the initial experimental work at the Accelerator Test Facility (ATF) at BNL to demonstrate ICS interaction in a pulse-train regime, using a novel laser recirculation scheme termed Recirculation Injection by Nonlinear Gating (RING). Initial experimental results and outlook are presented.  
 
THPPC046 Normal Conducting Radio Frequency x-band Deflecting Cavity Fabrication and Validation 3389
 
  • R.B. Agustsson, L. Faillace, A.Y. Murokh, S. Storms
    RadiaBeam, Santa Monica, USA
  • D. Alesini
    INFN/LNF, Frascati (Roma), Italy
  • V.A. Dolgashev
    SLAC, Menlo Park, California, USA
  • J.B. Rosenzweig
    UCLA, Los Angeles, California, USA
  • V. Yakimenko
    BNL, Upton, Long Island, New York, USA
 
  Funding: U.S. DOE SBIR grant DE-FG02-05ER84370
An X-band Traveling wave Deflector mode cavity (XTD) has been developed and fabricated at Radiabeam Technologies to perform longitudinal characterization of the sub-picosecond ultra-relativistic electron beams. The device is optimized for the 100 MeV electron beam parameters at the Accelerator Test Facility (ATF) at Brookhaven National Laboratory, and is scalable to higher energies. An XTD is designed to operate at 11.424 GHz, and features short filling time, femtosecond resolution, and a small footprint. RF design, structure fabrication, cold testing results and commissioning plans are presented.
 
 
THPPC047 Fabrication and Initial Tests of an Ultra-High Gradient Compact S-Band (HGS) Accelerating Structure 3392
 
  • L. Faillace, R.B. Agustsson, P. Frigola, A.Y. Murokh
    RadiaBeam, Santa Monica, USA
  • V.A. Dolgashev
    SLAC, Menlo Park, California, USA
  • J.B. Rosenzweig
    UCLA, Los Angeles, California, USA
  • V. Yakimenko
    BNL, Upton, Long Island, New York, USA
 
  Funding: Work supported by US DOE grant # DE-SC000866.
RadiaBeam Technologies reports on the RF design and fabrication of a ultra-high gradient (50 MV/m) S-Band accelerating structure (HGS) operating in the pi-mode at 2.856 GHz. The compact HGS structure offers a drop-in replacement for conventional S-Band linacs in research and industrial applications such as drivers for compact light sources, medical and security systems. The electromagnetic design (optimization of the cell shape in order to maximize RF efficiency and minimize surface fields at very high accelerating gradients) has been carried out with the codes HFSS and SuperFish while the thermal analysis has been performed by using the code ANSYS. The initial cold tests are presented together with the plans for high-power tests currently ongoing at Lawrence Livermore National Laboratory (LLNL).
 
 
THPPR069 Compact, Inexpensive X-Band Linacs as Radioactive Isotope Source Replacements 4136
 
  • S. Boucher, R.B. Agustsson, X.D. Ding, L. Faillace, P. Frigola, A.Y. Murokh, M. Ruelas, S. Storms
    RadiaBeam, Santa Monica, USA
 
  Funding: Work supported by DNDO Phase II SBIR HSHQDC-10-C-00148 and DOE Phase II SBIR DE-SC0000865.
Radioisotope sources are still commonly used in a variety of industrial and medical applications. The US National Research Council has identified as a priority the replacement of high-activity sources with alternative technologies, due to the risk of accidents and diversion by terrorists for use in radiological dispersal devices (“dirty bombs”). RadiaBeam Technologies is developing novel, compact, inexpensive linear accelerators for use in a variety of such applications as cost-effective replacements. The technology is based on the MicroLinac (originally developed at SLAC), an X-band linear accelerator powered by an inexpensive and commonly available magnetron. Prototypes are currently under construction. This paper will describe the design, engineering, fabrication and future testing of these linacs at RadiaBeam. Future development plans will also be discussed.