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The Stanford Linear Accelerator Center is currently operating with a Photocathode Electron Gun (PEG) to produce pokized electrons for its experimental program. Bunch intensities of up to 1O1* electrons within 2 ns (8 A) are required from the electron gun. Operation of PEG has demonstrated a Charge Limit phenomenon, whereby the charge that can be extracted(More)
Bacterial spot, one of the most damaging diseases of pepper, is caused by Xanthomonas euvesicatoria. This pathogen has worldwide distribution and it is particularly devastating in tropical and sub-tropical regions where high temperatures and frequent precipitation provide ideal conditions for disease development. Three dominant resistance genes have been(More)
The Linac Coherent Light Source (LCLS) is a SASE x-ray Free-Electron Laser (FEL) project presently under construction at SLAC [1]. The injector section, from drive-laser and RF photocathode gun through first bunch compressor chicane, was installed in fall 2006. Initial system commissioning with an electron beam is taking place during the spring and summer(More)
Installation of the PEP-II electron and positron Injection beamlines in the SLAC linac housing is now underway. Utilization of the existing high power, low emittance beams available at SLAC required that a great portion of the systems for pulsed extraction and transport of 9.0 GeV electrons and 3.1 GeV positrons for injection into the PEP-II rings will(More)
The Photocathode Electron Gun (PEG) at SLAC is required to produce bunch intensities of up to 10 11 electrons within 2 ns (8 Amps). Operation of PEG has demonstrated a 'Charge Limit' phenomenon, whereby the charge that can be extracted from the gun with an intense laser beam saturates at significantly less than 10 11 electrons (the expected 'Space Charge(More)
A&TRACT Linear colliders require high peak current beams with low duty factors. Several methods to produce polarized e' beams-for accelerators have been developed. The SLC, the first linear collider, utilizes a photocathode gun with a GaAs cathode. Although photocathode sources are probably the only er@ical alternative for the next generation of linear(More)
The LCLS FEL began user operations in September 2009 with photon energies from 800eV to 2 KeV and pulse energies above 2 mJ. Both long pulse (50-200 femtosecond FWHM) and short pulse (<10 femtosecond FWHM at 150 uJ) pulses were delivered at user request. In addition the FEL was operated at fundamental photon energies up to 10 KeV in preparation for hard(More)