The status of the RF photoinjector in the Neptune advanced accelerator laboratory is discussed. The components of the photoinjector: the RF gun and booster linac, chicane compressor, and beam diagnostic systems are described. Measurement techniques used to diagnose the short pulse length, high brightness beam are detailed and measurements of emittance and pulse compression are given. The effect of the pulse compressor on transverse emittance is explored. (11 References). 372 2001 Particle Accelerator Conference /home/httpd/docserver/releases/20080613005430/public/paper/file/25/anderson_2001_0121.pdf anderson_2001_0121.pdf 3 25 Accelerator RF systemsElectron acceleratorsElectron gunsElectron sourcesLinear acceleratorsParticle beam diagnosticsParticle beam injectionPulse compressionBeams in particle accelerators [A2921], Preacceleration,injection) [A2910], Linear accelerators [A2915D], Electron sources [A2925B], Particle beam handling and diagnostics [B7410B], Industrial and medical applications of microwaves [B1370], Electron emission, materials and cathodes [B2320], Particle sources and targets [B7410D]Neptune photoinjector commissioning, RF photoinjector, Neptune advanced accelerator laboratory, RF gun, booster linac, chicane compressor, beam diagnostic systems, pulse compressor, pulse compression, transverse emittance Proceedings of 2001 Particle Accelerator Conference. Chicago, IL, USA. U.S. Dept. Energy. Office of Naval Res. 18-22 June 2001. English Conference Paper 3 2001 IEEE 121 2007-07-27T23:53:36-07:00 89-91 2001