Photocathode Physics for Photoinjectors 2018

15 Oct 2018, 08:00 → 17 Oct 2018, 19:20 US/Mountain

Pueblo Ballroom (Hilton-Buffalo Thunder)

Nathan Moody (Los Alamos National Laboratory)

Monday, 15 October

08:00 → 08:30 Registration and Coffee

08:30 → 10:00 Welcome and Overview

08:30 Welcome

Speaker: Dr Nathan Moody (LANL)

08:40 Overview of Photocathode Physics

Ivan Bazarov

Speaker: Dr Ivan Bazarov (Cornell University)

09:30 Overview of Photocathode Applications

Speaker: Dr John Lewellen (LANL)

10:00 → 10:15 Break

10:15 → 12:15 Session 2: Application Oriented Research: Low Average Current: Session 3: Application Oriented Research: FEL

10:15 Review of requirements and challenges for UED/UEM

Speaker: Dr Renkai Li (SLAC)

10:35 Spatio-temporal quantum limits forUED/UEM from MTE

Speaker: Dr Jared Maxon (Cornell University)

10:55 <10 meV MTE from Cu

Speaker: Dr Siddharth Karkare (Arizona State University)

11:15 Laser-triggered, high-coherence electron emitters for femtosecond pulses generation in high-field environments

11:35 Nanocrystalline diamond cathodes

11:50 Workshop Discussion

12:15 → 13:45 Working lunch: discussion session (lunch provided)

13:45 → 16:15 Session 3: Application Oriented Research: FEL

13:45 Review of requirements and challenges for FEL

Speaker: Dr Bruce Dunham (SLAC National Accelerator Laboratory)

14:05 Cathodes for Swiss FEL

Speaker: Dr Romain Ganter (Paul Scherrer Institut)

14:25 GaN, n-type and 2-photon pump probe studies

Speaker: Dr Christoper Pierce (Cornell University)

14:40 Measurements of physical and chemical roughness of alkali-antimonides

Speaker: Dr William DeBenedetti (Cornell University)

14:55 Increase of intrinsic emittance by multiphoton photoemission

Speaker: Dr Rui Zhu (Peking University)

15:10 Workshop Discussion

16:15 → 16:30 Break

16:30 → 19:21 Session 4: Application Oriented Research: Spin Polarized Sources

16:30 Source requirements and polarization measurements at different energies

16:50 Absorption enhanced nanostructured GaAs

Speaker: Dr Shukui Zhang (Jefferson Lab)

17:10 High average current at CEBAF

Speaker: Dr Riad Suleiman (Jefferson Laboratory)

17:30 BNL activiites on spin polarized sources

Speaker: Dr Wei Liu (Brookhaven National Laboratory)

17:50 KEK activities on spin polarized sources

17:51 Improving lifetime of GaAs phtocathode using CsTe on GaAs

Speaker: Dr Luca Cultrera (Cornell University)

18:11 Spin polarized microscopy

Speaker: Dr Makoto Kuwahara (Nagoya University)

18:31 SPLEEM

18:51 Spin filters based photocathode

19:11 Workshop Discussion

19:21 → 20:51 Poster Session and Networking Reception, Vista A and B Rooms

Tuesday, 16 October

08:00 → 08:25 Coffee

08:25 → 08:30 Welcome and Announcements

08:30 → 10:15 Session 5: Application Oriented Research: High Average Current

08:30 Review of requirements and challenges

08:45 Cs2Te growth physics

Speaker: Dr Mengjia Gaowei (Brookhaven National Laboratory)

09:10 Cathode thermal decomposition

Speaker: Dr John Smedley (Brookhaven National Laboratory)

09:35 Capsule Cathodes

Speakers: Dr Jeffrey DeFazio (PHOTONIS), Dr Luca Cultrera (Cornell University)

09:50 Workshop Discussion

10:15 → 10:30 Break

10:30 → 12:30 Session 6: Application Oriented Research: Cathode Design

10:30 Review of requirements and challenges for holistic cathode design

Speaker: Dr Dave Dowell (Self)

10:35 Blade cathodes

10:55 Ultra-thin cathodes

Speaker: Dr Linda Spentzouris (Illinois Institute of Technology (IIT))

11:15 Etalon Photocathodes

Speaker: Dr Anna Alexander (University of California-San Diego)

11:35 2D photocathode coatings

Speaker: Dr Enrique Batista (Los Alamos National Laboratory)

11:55 Cathode surface layers for emittance improvement

12:15 Workshop Discussion

12:30 → 14:00 Lunch (on own)

14:00 → 15:50 Session 7: Operations and Demonstrations - Normal conducting

14:00 Space charge dominated photoemission from Cs2Te photocathodes in an L-band NC RF gun at PITZ

Speaker: Dr Ye Chen (DESY)

14:15 Photocathode preparation, characterization, and fundamental study using L-band NCRF guns at the AWA facility

Speaker: Dr Jiahang Shao (Argonne National Laboratory)

14:30 APEX

14:45 PEGASUS

15:00 IHEP

15:15 Shanghai

15:30 Tsinghua

15:45 Workshop Discussion

15:50 → 16:05 Break

16:05 → 17:50 Session 8: Operations and Demonstrations - Superconducting & DC

16:05 Cathode performance for electron cooling

Speaker: Dr Mengjia Gaowei (Brookhaven National Laboratory)

16:23 Cornell DC cryogun

Speaker: Dr William Li (Cornell University)

16:41 BerlinPro

Speaker: Dr Julius Kuehn (Helmholtz-Zentrum Berlin)

16:59 Jlab magnetized gun

Speaker: Dr Md Abdullah Mamun (Jefferson Lab)

17:17 PKU

Speaker: Dr Huamu Xie (PKU)

17:35 Workshop Discussion

17:50 → 18:05 Break

18:05 → 20:35 Catered Dinner and Evening Presentation, Vista A and B Rooms

Wednesday, 17 October

08:00 → 08:25 Coffee

08:25 → 08:30 Welcome and Announcements

08:30 → 10:35 Session 9: Theory and Computation

08:30 Review of requirements and challenges

08:40 High intensity laser & photoemission / Laser heating limits

Speaker: Dr Jai Kwan Bae (Cornell University)

08:55 Tunneling time

Speaker: Dr Luca Castiglioni (University of Zurich, Switzerland)

09:10 Density Functional Theory and Surfaces

Speaker: Dr Dan Finkenstadt (U.S. Naval Academy)

09:25 Density Functional Theory and Surfaces

Speaker: Dr Andreas Schroeder (University of Illinois at Chicago)

09:40 Quantum Dots and QE

10:00 (approved by PC) Many-body processes in Photoemission (DFT)

Speaker: Dr J. Kevin Nangoi (Cornell University)

10:15 (suggested by PC) Computational Screening for New Photocathode Materials

10:30 Workshop Discussion - combine with Session 10 WD

10:35 → 10:50 Break

10:50 → 12:55 Session 10: Theory and Computation - continued

10:50 Surface Acoustic Waves and enhanced PE

11:10 Space charge and laser intensity

Speaker: Dr Peng Zhang (Michigan State University)

11:30 Modeling quantum yield, emittance, and surface roughness effects

Speaker: Dr Dimitre Dimitrov (Tech-X Corp.)

11:50 (Suggested by Pietro and Sid) Chemical and surface roughness

Speaker: Dr Gevork Gevorkyan (CBB - Arizona State University)

12:05 Trajectories, beam codes, and delayed emission modeling

12:25 A predictive QE simulation using DFT input for beam codes

Speaker: Dr Kevin Jensen (Naval Research Laboratory)

12:45 Workshop Discussion

12:55 → 14:25 Working lunch: discussion session (lunch provided)

14:25 → 15:45 Session 11: Novel Research and Applications

14:25 The accelerator on a chip with a special focus on source requirements

Speaker: Dr Alexander Tafel (University Erlangen-Nuremberg (FAU))

14:45 Generation of attosecond electron pulses by inelastic ponderomotive scattering at an optical traveling wave

Speaker: Dr Martin Kozak (Charles University)

15:05 Quantum well and dot cathodes and their characterization

15:25 Workshop Discussion

15:45 → 16:00 Break

16:00 → 17:30 Session 12: Novel Research and Applications (and concluding discussion)

16:00 Towards adaptive, automated growth of photocathodes

Speaker: Dr Vitaly Pavlenko (Los Alamos National Laboratory)

16:20 Fabrication and photoemission results of diamond field arrays

Speaker: Dr Evgenya Simakov (Los Alamos National Laboratory)

16:40 Cryogenic TEmeter and sample exchange with STM and ARPES system

Speaker: Dr Alice Galdi (Cornell University)

17:00 Workshop Discussion

17:30 → 17:45 Closeout Discussion: General view of workshop, Next P3, comments and future plans

17:45 → 17:50 Adjourn 2018 P3 Workshop