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Research Facilities :: Fermilab NICADD Photoinjector Laboratory

The FNPL is an 18 MeV electron linac. It produces a low emittance, high-intensity beam. The accelerator is used for studying accelerator science, channelling radiation, and plasma wake-field acceleration. The photoinjector is comprised of a copper rf photocathode gun, and a TESLA 5-cell superconducting rf cavity operating at 1.3 GHz. The beamline includes a bunch compressor, assorted diagnostics that measure the transverse and longitudinal phase spaces of the electron beam, and experimental stations.

To learn more about the NICADD Facility, visit it's website

Table of Capabilities:

Predicted Value
Before Compression
Bunch Charge 8 nC=5x10^10e-
Laser pulse length FWHM 28 ps
Launch Phase 45 degrees
Beam radius at cathode 3.0 mm
Peak field on cathode 35 MV/m
Post-Gun Gamma 8.5
Transverse Emittance, normalized 11 mm mrad
Longitudinal Emittance (100% RMS) 820 deg keV
Momentum Spread 4.2%
Bunch Length 4.33 mm
Peak Current 276 Amperes
After Compression, from theory
Transverse Emittance, normalized 15 mm mrad
Bunch Length 1 mm
Peak Current 958 Amperes
After compression, from PARMELA
Transverse Emittance, normalized 26 mm mrad
Bunch length RMS .5mm
Momentum spread RMS 4.3%
Longitudinal Emittance 760 deg keV