Photocathode Physics for Photoinjectors 2012

Oct 8, 2012, 8:00 AM → Oct 10, 2012, 4:00 PM America/New_York

700 (Clark Hall)

Photocathode Physics for Photoinjectors 2012 Goals of the workshop include: review the state of the art (exclude polarization), discuss the physics of photoemission, identify R&D directions to better understanding of photocathodes: review measurements and theory (better computer codes and modeling of photoemission), discuss new approaches and new materials, identify overlap and coordinate inter-laboratory efforts of mutual interests.

Mon, October 8

8:00 AM Coffee break & Registration

Session 1 - Workshop Welcome, Reviews

Conveners: Bruce Dunham (Cornell), Triveni Rao (BNL)

1 Workshop Welcome

Speaker: Ivan Bazarov (Cornell)

Slides Bazarov_p3welcome.pptx

Video D1_Bazarov.mp4

2 Review of recent European Cathode Workshop

Speaker: David Dowell (SLAC)

Slides dowell_EuroFEL_2011_workshop.pptx

Video D1_Dowell.mp4

3 Review of recent U Chicago photocathode/detector workshop

Speaker: John Smedley (BNL)

Slides SmedleySecond_Workshop_on_Photocathodes_summary.pptx

Video D1_Smedley.mp4

4 Memories of the previous P3 workshop

Speaker: Triveni Rao (BNL)

Slides Rao_Overview_of_2010_P3_Workshop.pptx

Video D1_Rao.mp4

9:45 AM Coffee break & Registration

Session 2 - New significant developments and relevant measurements

Conveners: Howard Padmore (LBNL), John Smedley (BNL), Luca Cultrera (Cornell)

5 Measurements of transverse momentum of photoelectrons from metals and alkali antimonide semiconductors

Speaker: Theo Vecchione (LBNL)

Slides Vecchione.pdf

Video D1_Vecchione.mp4

6 Measurement of the chemistry and growth of alkali antimonides using in-situ AFM and XPS

Speaker: Miguel Ruiz Oses (BNL)

Slides Miguel_Ruiz_Cornell_2012.pptx

Video D1_Oses.mp4

7 Measuring the growth of alkali antimonides using in-situ XRD and x-ray reflectivity

Speaker: Susanne Schubert (HBZ)

Slides XPS_BNL_Schubert.pdf

Video D1_Schubert.mp4

8 Open Discussion or Contributed Talks

12:00 PM In-room Lunch

Session 2 - New significant developments and relevant measurements

9 Fabrication, characterization and use of alkali antimonides in a dc gun

Speaker: Luca Cultrera (Cornell)

Slides Luca_P3_2012.pptx

Video DVD2_clip1.mp4

10 MBE growth of GaAs photcathodes for the Cornell ERL photoinjector and effect of roughness on emittance

Speaker: Bill Schaff (Cornell)

Slides Schaff.pptx

Video DVD2_clip2.mp4

11 Surface characterization of GaAs photocathodes and high current operation experience

Speaker: Carlos Hernandez-Garcia (JLAB)

Abstract Abstract.pdf

Slides CarlosJLab.pdf

Video DVD2_clip3.mp4

12 K2CsSb cathode tests at JLAB

Speaker: Triveni Rao (BNL)

Slides K2CsSb_cathode_tests_at_JLab.pptx

Video DVD2_clip4.mp4

13 Open Discussion or Contributed Talks

3:00 PM Coffee Break

14 Development of high performance photocathodes for microscopy and accelerators

Speaker: Xiuguang Jin (Nagoya University)

Slides P3-X.G._JIN_-3.pptx

Video D2_Jin.mp4

15 Reduction of emittance from metals to less than thermal

Speaker: Jun Feng (LBNL)

Slides Jun_Cornell_2012_v2.pptx

Video D2_Feng.mp4

16 Growth and operation of Pb/Nb phtocathodes in SRF gun

Speaker: Susanne Schubert (HZB)

Slides Pb_HZB_Schubert.ppt

Video D2_Schubert.mp4

17 Cathode characterization and analysis at DESY

Speaker: Sven Lederer (DESY)

Slides Lederer_Cathode_analysis_at_DESY.pptx

Video D2_Lederer.mp4

18 Workfunction and Quantum Efficiency studies on Cesium Telluride

Speaker: Katherine HARKAY (ANL)

Slides harkayYusof-p3-2012-final.pdf

Video D2_Harkay.mp4

19 DMD-Based Quantum Efficiency Mapping and Self-Healing of Hybrid Diffuser Dispensers

Speaker: Eric Montgomery (UMD)

Abstract Abstract.pdf

Slides P3_2012_Montgomery.ppt

Video D2_Montgomery.mp4

20 Operation of the High-Charge PHIN RF Photoinjector with Cs3Sb Cathodes

Speaker: Christoph Hessler (CERN, Geneva, Switzerland)

Abstract Abstract.pdf

Slides hessler-2012-10-08-P3-workshop.pptx

Video D2_Hessler.mp4

21 Photocathodes for Rossendorf SRF gun

Speaker: Dr Rong Xiang (Helmholtz-Zentrum Dresden-Rossendorf)

Abstract Abstract.pdf

Slides PPP_Cornell_Xiang.pptx

22 Open Discussion or Contributed Talks

6:00 PM Cornell lab tours

Tue, October 9

8:00 AM Coffee break

Session 3 - Photocathode physics I: new insights in theory and modeling

Conveners: D. A. Dimitrov (TechX), Ivan Bazarov (Cornell), Kevin Jensen (NRL)

23 Monte-Carlo simulations of Charge transport and photoemission from GaAs photcathodes

Speaker: Siddharth Karkare (Cornell)

Slides Charge_transport_and_photoemission_from_GaAs.pptx

Video D3_Karkare.mp4

24 Modeling Electron Emission from Diamond-Amplified cathodes

Speaker: D. A. Dimitrov (TechX)

Slides Dimitrov_P3_Workshop_Cornell_Oct_Y12.pdf

25 Monte Carlo Scattering Corrections to Moments-Based Emission Models

Speaker: Eric MONTGOMERY (UMD)

Abstract Abstract.pdf

Slides P3_2012_Montgomery-Jensen.pdf

Video D3_Jensen_Montgomery.mp4

26 Open Discussion

10:00 AM Coffee Break

27 Models of effect of roughness on emittance

Speaker: Dave Dowell (SLAC)

Slides Cathode_Roughness_Dowell.pptx

Video D3_Dowell.mp4

28 One-step model of photoemission and extensions to the three-step model

Speaker: Weishi Wan (LBNL)

Slides Wan2_Cornell_3_step_model_kT.pptx

Video D3_Wan.mp4

29 Modeling the Resupply, Diffusion, and Evaporation of Cesium Based Dispenser Photocathodes

Speaker: Zhigang Pan (NRL)

Slides ZP_P3Workshop2012.pdf

Video D3_Pan.mp4

30 Measurements and modeling of space charge assisted photoemission at PITZ

Speaker: Mikhail Krasilnikov (DESY)

Slides P3-2012Krasilnikov.pdf

Video D3_Krasilimikov.mp4

31 Open Discussion or Contributed Talks

12:00 PM In-room lunch

Session 4 - Photocathode physics II: towards photocathode material engineering

Conveners: Bruce Dunham (Cornell), Katherine Harkay (ANL), Sven Lederer (DESY), Wayne Hess (PNNL)

32 Redesigning Cs2Te: Workfunction Lowering and Quantum-Efficiency Preservation via Acetylation

Speaker: Katherine Harkay (ANL)

Abstract nemeth.pdf

Slides harkayNemeth-designerCs2Te.pdf

Video D4_Harkey.mp4

33 Surface science techniques

Speaker: Wayne Hess (PNNL)

Slides P3_Workshop_2012_Hess.ppt

Video D4_Hess.mp4

34 Electron effective mass: Emittance and efficiency

Speaker: Andreas Schroeder (UIC)

Slides Schroeder_P3workshop2012.ppt

Video D4_Schroeder.mp4

35 Status OF CsBr Photocathodes

Speaker: Dr Juan Maldonado (SLAC National Accelerator Laboratory)

Abstract Abstract.pdf

Slides Cornell_3p_workshop_10-9-2012JMaldonado2.pptx

36 Nanostructured Photoelectron Sources for Electron Beamlet Array Generation

Speakers: Dr Michael Swanwick (Massachusetts Institute of Technology), Dr Richard Hobbs (Massachusetts Institute of Technology)

Abstract Abstract.pdf

Slides 3P_Workshop_Hobbs.pdf

37 High Aspect Ratio Si Photoelectron Emitter Arrays

Speaker: Donnie Keathley (MIT)

Abstract Abstract.pdf

Slides si_high_ar_tips_presentation.pdf

38 Open Discussion or Contributed Talks

3:00 PM Coffee Break

39 Nano-cavity plasmonic photocathodes

Speaker: Alex Polyakov (LBNL)

Slides Polyakov.pdf

40 Grating based plasmonic photocathodes

Speaker: Pietro Musumeci (UCLA)

Abstract Abstract.pdf

Slides Photoemission_studies_from_nanopatterned_cathodes.pdf

41 Open Discussion

4:00 PM Cayuga lake boat trip

Wed, October 10

Session 5 - Future outlook and collaborations

Conveners: Carlos Hernandez-Garcia (JLAB), Daniele Sertore (INFN), Fay Hannon (JLAB), Ivan Bazarov (Cornell)

42 Cathode production and supply, useful things to track, photocathode website

Speaker: Daniele Sertore (INFN)

Slides PPP12-INFN_Milano.pptx

43 LBNL gun as a test venue for various cathodes

Speaker: Fernando Sannibale (LBNL)

Slides Sannibale_P3_Cathode_Wrkshp_Cornell_Oct2012.ppt

44 Update on the photocathode wiki-project

Speaker: Siddharth Karkare (Cornell)

Slides Karkare_Photocathode_Wiki_Project.pptx

45 German-Russian collaboration on high-brightness photocathodes

Speaker: Martin Schmeißer (Helmholtz Centre Berlin)

Slides p3_schmeisser.pdf

46 Open Discussion or Contributed Talks

47 Summary of the workshop

Speaker: Charlie Sinclair

Slides Summary_of_the_2nd_PPP_Workshop.pptx

10:15 AM Coffee Break

48 Outlook and 2-year plans from each group (1 slide in advance)

Slides 2_Year_Outlook.pptx

49 Open Discussion for Future Collaboration

12:00 PM Adjourn

12:05 PM Lunch (on your own)