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EWPAA 2022: European Workshop on Photocathodes for Particle Accelerator Applications

20–22 Sept 2022
Milano
Europe/Rome timezone
Thanks to all participants!!

Contribution List

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  1. 1. High brightness beams
    Alberto Luigi Bacci (Istituto Nazionale di Fisica Nucleare)
    20/09/2022, 14:20
  2. 2. Recent advancements on photocathodes
    Laura Silvia Monaco (Istituto Nazionale di Fisica Nucleare)
    20/09/2022, 14:50
  3. 3. Experience on polarized photocathodes
    Kurt Aulenbacher (Institut für Kernphysik der Johannes Gutenberg-Universität Mainz)
    20/09/2022, 15:10
  4. 15. JLAB DC gun developments
    Dr Carlos Hernandez Garcia (JLAB)
    20/09/2022, 16:00
  5. 26. CsK2Sb-photocathodes for application in an industrial accelerator
    Verena Kuemper (Research Instruments)
    20/09/2022, 16:20

    The LightHouse project is a novel industrial application of an electron accelerator for the production of medical isotopes (99Mo) as an alternative to nuclear reactors.
    In the framework of the SMART project of the company Institut National des Radioéléments (IRE), RI is responsible for the superconducting electron accelerator which includes the DC photoinjector, the SRF modules and the...

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  6. 4. Status of precise measurements of electron-beam polarization changes during long term operation
    Dr Jennifer Groth (Uni Mainz)
    20/09/2022, 16:40

    For the high-precision measurements in the experiments at the new Mainz Energy Recovering Superconducting Accelerator (MESA), it is necessary to know exactly the long-term spin properties of the electron beam. For this purpose, a test setup has been built at the Institute for Nuclear physics. Different preparation methods of a photocathode with nitrogen trifluoride and oxygen are compared.The...

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  7. 31. Photocathode activities at DESY
    Dr David Pavel Juarez Lopez (DESY)
    20/09/2022, 17:00
  8. 16. Performance of bialkali photocathode in DC-SRF photoinjector
    Dr Haumu Xie (Peking University)
    20/09/2022, 17:20
  9. 5. Photocathode perfomance at LCLS-II
    Dr Theo Vecchione (SLAC)
    20/09/2022, 17:40
  10. 28. Stability and electronic properties of CsK2Sb surface facets
    Dr Richard Schier (UNI-Oldenburg)
    20/09/2022, 18:00
    Poster
    Poster

    Multi-alkali antimonides have been proposed as a promising class of photocathode materials for particle accelerators. First-principles results have recently complemented the experimental efforts in the characterization of these systems [1]. However, most of the existing studies focus on bulk crystals and still little is known about their surface properties. We fill this gap with an ab initio...

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  11. 29. Superconducting photocathode quantum efficiency enhancement with UV plasmonics
    Dr Linda Spentzouris (Illinois Tech (IIT))
    20/09/2022, 18:05
    Poster
    Poster

    A surface modification technique is described that significantly enhances the photoelectric quan-
    tum efficiency (QE) of Nb at 248 nm by more than two orders of magnitude, thereby making this
    material suitable potentially as a cathode for superconducting radiofrequency (SRF) photoinjectors. The approach uses ultra-thin-film metallic coatings that exploit proximity coupled superconductivity,...

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  12. 36. THE ALKALI METAL PHOTOCATHODE PREPARATION FACILITY AT DARESBURY LABORATORY: FIRST CAESIUM TELLURIDE DEPOSITION RESULTS
    H. M. Churn (ASTeC)
    20/09/2022, 18:10
    Poster
    Poster
  13. 25. Ultra-thin MgO films on metal photocathodes to enhance QE
    Dr Christopher Benjamin (Uni Warwick and STFC)
    21/09/2022, 09:00
    Presentation
    New Photocathode Ideas

    Metal photocathodes are widely utilised for their ease of use, high durability and fast response time. However, the high work function (WF) and low quantum efficiency (QE) typically observed in metals necessitates the use of high power deep UV lasers. Metal oxide films on metals have been shown to produce a surface with a lower WF and improved QE* whilst maintaining photocathode...

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  14. 6. Plasma photocathode
    Carlo Benedetti (LBNL)
    21/09/2022, 09:20
    Presentation
    New Photocathode Ideas
  15. 33. CERN Photocathode Activities
    Dr Miguel Martinez Calderon (CERN)
    21/09/2022, 09:40
    Presentation
    New Photocathode Ideas
  16. 32. Protective layers on bi-alkali photocathodes
    Dr Nathan Moody (LANL)
    21/09/2022, 10:00
    Presentation
    New Photocathode Ideas
  17. 20. AI/ML-selection of air-stable photocathodes
    Dr Evan Antoniuk (Stanford)
    21/09/2022, 10:20
    Presentation
    New Photocathode Ideas
  18. 7. Studies on the evolution of MTE for photocathdes subjected to controlled degradation by gas exposure
    Liam Soomary (The Cockcroft Institute / The University of Liverpool)
    21/09/2022, 11:10
    Presentation
    Metallic Photocathodes

    The electron beam quality of a photocathode-based electron source is limited by the achievable mean transverse energy (MTE). The Liouville theorem states that the total emittance of a beam cannot improve as it propagates through an accelerator, only manipulated using lattice optics. Therefore minimising the intrinsic emittance of a photocathode is important. This alongside other factors such...

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  19. 19. Copper cathode
    Dr Tim Noakes (STFC)
    21/09/2022, 11:30
    Presentation
    Metallic Photocathodes
  20. 30. Copper photocathode experience at FERMI
    Mauro Trovò (ELETTRA)
    21/09/2022, 11:50
    Presentation
    Metallic Photocathodes
  21. 34. Technology aspects in preparation at NCBJ of Nb_Pb sc photocathodes for XFEL-type RF e- gun.
    Dr Jerzy Lorkiewicz (NCBJ)
    21/09/2022, 12:10
    Presentation
    Metallic Photocathodes

    A photocathode composed of a Pb layer deposited on Nb substrate is an attractive solution proposed for fully superconducting, radio-frequency electron gun to be used in the linear accelerator of the European X-ray free electron laser (Eu-XFEL) operating at Deutsches Elektronen Synchrotron (DESY) and in other, similar devices. Much effort has been put in development of deposition and...

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  22. 8. Multi-alkali antimonide photocathodes for highly brilliant electron beams
    Chen Wang (HZB)
    21/09/2022, 14:00

    The goal of the Sealab/bERLinPro project is to build a new generation superconducting RF electron accelerator at HZB. Therefore, a photocathode with high QE and long operation lifetime is required for this project. Multi-alkali antimonide photocathodes deposited on Mo substrate is chosen for this application due to its high QE (>1%) at visible wavelengths and good thermal conductivity....

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  23. 9. Performance characterisation at Daresbury Laboratory of CsTe photocathodes grown at CERN
    Dr Lee Jones (STFC)
    21/09/2022, 14:20

    A UK X-FEL will require a high-performance photocathode to generate an electron beam with the necessary qualities. Caesium Telluride is a candidate material for this photocathode application.

    The surface characteristics of a photocathode affect many important factors of the photoemission process including the photoemission threshold, the intrinsic emittance and the quantum efficiency....

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  24. 23. Cs2TE\KCsSb in gun operation at PITZ
    Dr Sandeep Mohanty (DESY/INFN)
    21/09/2022, 14:40
  25. 10. Operation of Cs2Te in SRF gun for THz user shifts
    Dr Rong Xiang (HZDR)
    21/09/2022, 15:00
  26. 35. ERL Roadmap for Europe
    Boris Militsyn
    21/09/2022, 15:20
    Presentation
    ERL Roadmap for Europe
  27. 27. Monte Carlo transverse emittance and quantum efficiency study on Cs2Te
    Gowri Adhikari (SLAC)
    22/09/2022, 09:00
    Presentation
    Theory

    Monte Carlo simulation study of Cs2Te

    Gowri Adhikari1,7, Houjun Qian1,2, Peng-Wei Huang3, Mikhail Krasilnikov1, Matthias Gross1, Frank Stephan1, Sven Lederer6, Pavel Juarez6, Caterina Cocchi4, Holger-Dietrich Sassnick4, Daniele Sertore5, and Laura Monaco5

    1 Deutsches Elektronen-Synchrotron DESY, Platanenalle 6, 15738 Zeuthen, Germany
    2 Zhangjiang Laboratory, Shanghai 201210, China
    3...

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  28. 18. Monte Carlo simulations of electron photoemission from plasmon-enhanced bialkali photocathode
    Dr Zenggong Jiang (SINAP)
    22/09/2022, 09:20
    Presentation
    Theory
  29. 14. Exploring cesium–tellurium phase space via high-throughput calculations beyond semi-local density-functional theory
    Holger-Dietrich Sassnick (Uni Oldenburg)
    22/09/2022, 09:40
    Presentation
    Theory
  30. 11. Ultrafast sub-threshold one-photon photoemission
    Andreas Schroeder (Uni Illinois)
    22/09/2022, 10:00
    Presentation
    Theory
  31. 21. ASU Photocathode Research Lab
    Dr Siddartha Karkare (Uni Arizona)
    22/09/2022, 11:00
  32. 24. Photocathode response time measurement
    Dr Gregor Loisch (DESY Zeuthen)
    22/09/2022, 11:20
  33. 22. Resolving surface chemical states of p-GaN:Cs photocathodes by XPS analysis
    Jana Schaber (HZDR)
    22/09/2022, 11:40
  34. 17. High crystalline cesium telluride photocathode on atomically thin graphene with co-deposition
    Dr Mengjia Gaowei (BNL)
    22/09/2022, 12:00
  35. 12. Molecular beam epitaxy of Cs-Sb thin films: structure-oriented growth of high efficiency photocathodes
    Dr Alice Galdi (Universita' degli Studi di Salerno)
    22/09/2022, 12:20
  36. 13. Stoichiometry control and automated growth of alkali antimonide photocathode films by molecular beam deposition
    Dr Vitaly Pavlenko (LANL)
    22/09/2022, 12:40