• H. Bluem, V. Christina, D. Dowell, J.H. Park, J. Rathke, A.M.M. Todd, L.M. Young
  AES, Medford, NY
• L.R. Dalesio
  EPIC Consulting, Medford, New York
• D. Douglas
  Douglas Consulting, York, Virginia
• S. Gewinner, H. Junkes, G. Meijer, W. Schöllkopf, W.Q. Zhang, G. von Helden
  FHI, Berlin
• S.C. Gottschalk, R.N. Kelly
  STI, Washington
• K. Jordan
  Kevin Jordan PE, Newport News, Virginia
• U. Lehnert, P. Michel
  HZDR, Dresden
• W. Seidel, R. Wünsch
  FZD, Dresden

The Fritz Haber Institute of the Max Planck Society in Berlin, Germany will celebrate its Centennial in 2011. Coincident with this event, they will christen a THz Free Electron Laser (FEL) that will operate from 3 to 300 microns. A linac with a gridded thermionic gun is required to operate from 15 to 50 MeV at 200 pC while delivering a transverse rms emittance of 20 mm-mrad in a 1 psec rms, 50 keV rms energy spread bunch at the wigglers. Mid-IR and far-IR wigglers enable this electron beam to deliver the required radiation spectrum. In addition to the longitudinal emittance, a key design requirement is the minimization of the micropulse and macropulse jitter to ensure radiation wavelength stability and timing consistency for pump probe experiments. We present the completed physics and engineering design that delivers the required performance for this device. Shipment is scheduled for the end of the calendar year and the status of fabrication will be summarized.