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Photocathode Physics for Photoinjectors 2018

15–17 Oct 2018
Hilton-Buffalo Thunder
US/Mountain timezone

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Session

Session 3

Session 3
15 Oct 2018, 13:30
Pueblo Conference Room A (Hilton-Buffalo Thunder)

Pueblo Conference Room A

Hilton-Buffalo Thunder

20 Buffalo Thunder Trail Santa Fe, NM, USA 87506

Conveners

Session 3: Application Oriented Research: FEL

  • Siddharth Karkare (Arizona State University)

Presentation materials

There are no materials yet.

  1. 12. Requirements and Challenges of Photocathodes for Free Electron Laser Applications
    Dr Bruce Dunham (Stanford Linear Accelerator)
    15/10/2018, 13:30
    Session 3: Application Oriented Research: FEL

    Photocathodes are the source of electrons for nearly all modern accelerators. They are widely used due to their flexibility to meet a broad variety of beam requirements and are particularly important for machines relying on high-brightness beams. In this presentation, we will investigate the requirements and challenges for photocathodes used in linac-driven free electron lasers. The cathode...

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  2. 43. Photocathode research at the UCLA Pegasus Laboratory
    Dr Pietro Musumeci (University of California - Los Angeles), Pietro Musumeci
    15/10/2018, 13:50
    Session 7: Operations and Demonstrations: Normal conducting

    The Pegasus photoinjector laboratory has a variety of activities related to photocathode technology. In the upcoming months we plan to test the performances of advanced photocathode materials such as alkali antimonide cathodes in the high gradient radiofrequency photoinjector using a recently developed ultrahigh vacuum load-lock chamber. I will also present an update on a different project...

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  3. 14. In Pursuit of the Narrow Cone; Prospects for 2-photon and n-type Photoemission from Al(x)Ga(1-x)N
    Mr Christopher Pierce (Cornell University)
    15/10/2018, 14:10
    Session 3: Application Oriented Research: FEL

    Although low effective mass semiconductors offer the promise of photocathodes with subthermal mean transverse energy (MTE), the effect has never been observed in practice. One proposed explanation for this is that the cesium coating used on many photocathodes, while decreasing their work function, increases the MTE of the photoemitted electrons. In this talk, we discuss the ongoing effort at...

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  4. 38. Ultra-thin two-dimensional crystalline nanoporous coatings as cathode protection layers
    Dr J Anibal Boscoboinik (Brookhaven National Laboratory)
    15/10/2018, 14:25
    Session 6: Application Oriented Research: Cathode Design

    Operational lifetime of cathodes for high brightness electron sources are often limited by three factors – ion bombardment of the cathode, chemical contamination and thermal decomposition. The recent development of 0.5 nm thick crystalline two-dimensional nanoporous silica and aluminosilicate structures has the potential of reducing these detrimental effects and thus significantly increase the...

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  5. 80. Effects of Chemical and Physical Roughness on MTE
    Dr Gevork Gevorkian (CBB-Arizona State University)
    15/10/2018, 14:40
    Session 3: Application Oriented Research: FEL

    The performance of x-ray light sources, such as free electron lasers, ultrafast electron diffraction systems and ultrafast electron microscopy, is limited by the brightness of the electron beam. Given the improvements in photocathode design and synthesis, the source surface roughness has become a key limiting factor on the intrinsic emittance, specifically the mean transverse energy (MTE), of...

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  6. 16. Increase of intrinsic emittance induced by multiphoton photoemission from copper cathodes illuminated by femtosecond laser pulses
    Dr Rui Zhu (Peking University)
    15/10/2018, 14:55
    Session 3: Application Oriented Research: FEL

    Electron sources driven by femtosecond laser have important applications in many aspects, and the research about the intrinsic emittance is becoming more and more crucial. The intrinsic emittance of polycrystalline copper cathode, which was illuminated by femtosecond pulses (FWHM of the pulse duration was about 100 fs) with photon energies above and below the work function, was measured with...

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  7. 17. Workshop Discussion
    15/10/2018, 15:10
    Session 3: Application Oriented Research: FEL
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