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Melissinos, A.C.

Paper Title Page
TPAE037 Simulation of the Laser Acceleration Experiment at the Femilab/NICADD Photoinjector Laboratory 2503
 
  • P. Piot
    Fermilab, Batavia, Illinois
  • A.C. Melissinos, R. Tikhoplav
    Rochester University, Rochester, New York
  
  The possibility of using a laser to accelerate electrons in a waveguide structure with dimension much larger than the laser wavelength was first proposed by Pantell [NIM A 393 pg 1-5 (1997)] and investigated analytically by M. Xie [reports LBNL-40558 (1997) and LBNL-42055 (1998) available from LBNL Berkeley]. In the present paper we present the status of our experimental plan to demonstrate the laser interaction on an electron beam with initial momentum of 40-50 MeV/c. A laser (λ=1.06 micron) operating on the TM*01 mode has been developed. The large wavenumber (k~6x106 m-1) together with the initial low electron momentum poses a serious problem for efficient acceleration. In the present paper, we present start-to-end simulations of the laser acceleration experiment as foreseen to be installed in the upgraded Femilab/NICADD photoinjector laboratory.  
WPAP032 Emittances Studies at the Fermilab/NICADD Photoinjector Laboratory
 
  • R. Tikhoplav, A.C. Melissinos
    Rochester University, Rochester, New York
  • J.L. Li, P. Piot
    Fermilab, Batavia, Illinois
  
  Funding: This work was supported by the Universities Research Association Inc. under contract DE-AC02-76CH00300 with the U.S. DOE, and by NICADD.

The Fermilab/NICADD photoinjector incorporates an L-band rf-gun capable of generating 1-10 nC bunches. The bunches are then accelerated to 16 MeV with a TESLA superconducting cavity. In the present paper we present parametric studies of transverse emittances and energy spread for a various operating points of the electron source (RF-gun E-field, laser length and spot size, and solenoid settings). We especially study the impact, on transverse emittance, of Gaussian and Plateau temporal distribution of the photocathode drive-laser.