Initial measurements of the UCLA rf photoinjector

Rosenzweig, James; Barov, N.; Hartman, S.; Hogan, Mark; Park, S.; Pellegrini, C.; Travish, G.; Zhang, R.; Davis, P.; Hairapetian, G.; Joshi, C.

doi:10.1016/0168-9002(94)90387-5

Cited by 41 publications

(14 citation statements)

References 3 publications

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“…The linear portion at low laser energies gives the quantum efficiency and the onset of the space charge limit is indicated by the rollover of the curve from this linear dependence. The space charge limit is quantified by an effective transverse rms radius assuming a Gaussian distribution [13,14].…”

Section: The Cathodementioning

confidence: 99%

Commissioning the Linac Coherent Light Source injector

Akre¹,

Dowell²,

Emma³

et al. 2008

Phys. Rev. ST Accel. Beams

222

146

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The Linac Coherent Light Source is a SASE x-ray free-electron laser (FEL) project presently under construction at SLAC [J. Arthur et al., SLAC-R-593, 2002.]. The injector section, from drive laser and rf photocathode gun through first bunch compressor chicane, was installed in the fall of 2006. The initial system commissioning with an electron beam was completed in August of 2007, with the goal of a 1.2-micron emittance in a 1-nC bunch demonstrated. The second phase of commissioning, including second bunch compressor and full linac, is planned for 2008, with FEL commissioning in 2009. We report experimental results and experience gained in the first phase of commissioning, including the photocathode drive laser, rf gun, photocathode, S-band and X-band rf systems, first bunch compressor, and the various beam diagnostics.

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Section: The Cathodementioning

confidence: 99%

Commissioning the Linac Coherent Light Source injector

Akre¹,

Dowell²,

Emma³

et al. 2008

Phys. Rev. ST Accel. Beams

222

146

View full text Add to dashboard Cite

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“…2(g)-(h). The plateau in the the bunch charge indicates that the THz field overcomes the space charge force and extracts all the emitted electrons [6] …”

Section: Resultsmentioning

confidence: 99%

Sub-keV Electron Gun Driven by Ultrafast THz Pulses

Huang

Fallahi

et al. 2016

Lasers Congress 2016 (ASSL, LSC, LAC)

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“…If the space charge field depends on position then the QE will depend on both space and time 3,4 . However, in typical rf guns the head of the beam gains a small amount of energy over the duration of the laser pulse and moves only 10's of microns.…”

Section: Modelmentioning

confidence: 99%

Rf Gun Photo-Emission Model for Metal Cathodes Including Time Dependent Emission

Schmerge

Clendenin

Dowell

et al. 2007

Int. J. Mod. Phys. A

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The quantum efficiency from a metal cathode is strongly dependent on the field at the cathode due to the Schottky effect. Since the field is time dependent the quantum efficiency is also time dependent. Thus the laser pulse shape used to generate electrons in a photocathode rf gun is not the same as the electron bunch shape. In addition since the thermal emittance and quantum efficiency are related, the thermal emittance is also time dependent.Contributed to the workshop on The Physics and Applications of High Brightness Electron Beams

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Initial measurements of the UCLA rf photoinjector

Cited by 41 publications

References 3 publications

Commissioning the Linac Coherent Light Source injector

Commissioning the Linac Coherent Light Source injector

Sub-keV Electron Gun Driven by Ultrafast THz Pulses

Rf Gun Photo-Emission Model for Metal Cathodes Including Time Dependent Emission

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