CIS Refereed Publications

2019

• Wei Liu and Erdong Wang, "Monte Carlo modeling of thin GaAs photocathodes," J. Appl. Phys. 126, 075706 (2019); https://doi.org/10.1063/1.5113804, media:modeling thin GaAs photocathodes.pdf, Wei and Erdong modeled QE data obtained from JLab, SPIRE/Bandwidth Semiconductor samples, MOCVD-grown bulk GaAs wafers with different thickness and dopant density.

2018

• G. Palacios-Serrano, F. Hannon, C. Hernandez-Garcia, M. Poelker, and H. Baumgart, "Electrostatic design and conditioning of a triple point junction shield for a -200 kV DC high voltage photogun," Review of Scientific Instruments 89, 104703 (2018), doi: 10.1063/1.5048700, view online:text, media:COMSOL modeling of 200kV gun.pdf

• K. Aulenbacher, E. Chudakov, D. Gaskell, J. Grames, and K.D. Paschke, "Precision electron beam polarimetry for next generation nuclear physics experiments", International Journal of Modern Physics E, 27, 7 (2018) 1830004 (57 pages) DOI: 10.1142/S0218301318300047 On-Line media:IJMPE_27_7_2018.pdf

• Wei Liu, Yiqiao Chen, Aaron Moy, Matthew Poelker, Marcy Stutzman, and Shukui Zhang, "Evaluation of GaAsSb/AlGaAs strained superlattice photocathodes," AIP Advances 8, 075308 (2018); doi: 10.1063/1.5040593, View online: [1], media:GaAsSb_AlGaAs photocathode study.pdf

• Marcy L. Stutzman, Philip A. Adderley, Md. Abdullah A. Mamun, and Matt Poelker, "Nonevaporable getter coating chambers for extreme high vacuum," J. Vac. Sci. Technol. A 36, 031603 (2018) [2],media:NEG coating chambers for extreme high vacuum.pdf

2017

• M.A. Mamun, M. R. Hernandez-Flores, E. Morales, C. Hernandez-Garcia, and M. Poelker, "Temperature Dependence of Alkali-Antimonide Photocathodes: Evaluation at Cryogenic Temperatures," Phys. Rev. Accel. Beams 20, 103403 (2017), [3], media:Temperature dependence CsK2Sb photocathodes.pdf

• C. Hernandez-Garcia, D. Bullard, F. Hannon, Y. Wang and M. Poelker, “High voltage performance of a dc photoemission electron gun with centrifugal barrel-polished electrodes”, Rev. Sci. Instrum. 88, 093303 (2017), [4], media:Barrel polishing paper.pdf

• C. Hernandez-Garcia, M. Krasilnikov, et al., "Charge production studies from Cs₂Te photocathodes in a normal conducting RF gun", Nuclear Instruments and Methods in Physics Research, A 871 (2017) 97–104, Media:Carlos' PITZ charge studies article in NIMA August 2017.pdf

• Wei Liu, Matt Poelker, Xincun Peng, Shukui Zhang, and Marcy Stutzman, "A comprehensive evaluation of factors that influence the spin polarization of electrons emitted from bulk GaAs photocathodes", J. Appl. Phys., 122, 035703 (2017), [5], Media:polarization study.pdf

• Yoshitaka Taira, Shukui Zhang, "Split in phase singularities of an optical vortex by off-axis diffraction through a simple circular aperture", Opt. Lett. 42, 1373 (2017), Opt. Lett., 42, 1373 (2017)

2016

• Wei Liu, Yiqiao Chen, Wentao Lu, Aaron Moy, Matt Poelker, Marcy Stutzman, and Shukui Zhang, "Record-level quantum efficiency from a high polarization strained GaAs/GaAsP superlattice photocathode with distributed Bragg reflector", Appl. Phys. Lett. 109, 252104 (2016), [6], media:DBR photocathode.pdf

• Wei Liu, Shukui Zhang, Marcy Stutzman, and Matt Poelker, "Effects of ion bombardment on bulk GaAs photocathodes with different surface-cleave planes", Phys. Rev. Accel. Beams 19, 103402 (2016), [7], media:ion implantation study.pdf

• D. Abbott, P. Adderley, A. Adeyemi, P. Aguilera, M. Ali, H. Areti, M. Baylac, J. Benesch, G. Bosson, B. Cade, A. Camsonne, L. S. Cardman, J. Clark, P. Cole, S. Covert, C. Cuevas, O. Dadoun, D. Dale, H. Dong, J. Dumas, E. Fanchini, T. Forest, E. Forman, A. Freyberger, E. Froidefond, S. Golge, J. Grames, P. Guèye, J. Hansknecht, P. Harrell, J. Hoskins, C. Hyde, B. Josey, R. Kazimi, Y. Kim, D. Machie, K. Mahoney, R. Mammei, M. Marton, J. McCarter, M. McCaughan, M. McHugh, D. McNulty, K. E. Mesick, T. Michaelides, R. Michaels, B. Moffit, D. Moser, C. Muñoz Camacho, J.-F. Muraz, A. Opper, M. Poelker, J.-S. Réal, L. Richardson, S. Setiniyaz, M. Stutzman, R. Suleiman, C. Tennant, C. Tsai, D. Turner, M. Ungaro, A. Variola, E. Voutier, Y. Wang, and Y. Zhang, "Production of Highly Polarized Positrons Using Polarized Electrons at MeV Energies",
  • Phys. Rev. Lett., 116, 214801 (2016)
  • arXiv:1606.08877 [physics.acc-ph]
  • media:PhysRevLett.116.214801.pdf
  • APS Focus article on PEPPo
  • Daily Press article on PEPPo

• B. Roberts, F. Hannon, M. M. Ali, E. Forman, J. Grames, R. Kazimi, W. Moore, M. Pablo, M. Poelker, A. Sanchez, and D. Speirs, "Harmonically resonant cavity as a bunch-length monitor", Phys. Rev. Accel. Beams 19, 052801 (2016), [8], Media:CEBAF harmonically resonant cavity bunchlength monitor.pdf

• C. Hernandez-Garcia, M. Poelker, and J. Hansknecht, "High Voltage Studies of Inverted-geometry Ceramic Insulators for a 350kV dc Polarized Electron Gun", IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 23, No. 1; February 2016 [9], Media:High voltage studies in print.pdf

• Md Abdullah A. Mamun, Abdelmageed A. Elmustafa, Carlos Hernandez-Garcia, Russell Mammei, and Matthew Poelker, "Effect of Sb thickness on the performance of bialkali-antimonide photocathodes", J. Vac. Sci. Technol. A 34 021509 (2016), [10], Media:alkali-antimonide study - long paper.pdf

2015

• M. A. Mamun, C. Hernandez-Garcia, M. Poelker, and A. A. Elmustafa, "Correlation of CsK₂Sb photocathode lifetime with antimony thickness", APL Materials 3, 066103 (2015), [[Media:CsK₂Sb using effusion source_short paper.pdf]]

• Mahzad BastaniNejad, Abdelmageed A. Elmustafa, Eric Forman, Steven Covert, John Hansknecht, Carlos Hernandez-Garcia, Matthew Poelker, Lopa Das, Michael Kelley and Phillip Williams, "Evaluation of electropolished stainless steel electrodes for use in DC high voltage photoelectron guns", J. Vac. Sci. Technol. A 33 041401 (2015), Media:EP electrode study_in print.pdf

• Md Abdullah A. Mamun, Abdelmageed A. Elmustafa, Rhys Taus, Eric Forman and Matthew Poelker, "TiN coated aluminum electrodes for DC high voltage electron guns", J. Vac. Sci. Technol. A 33, 031604 (2015), Media:TiN coated aluminum electrodes_in print.pdf

2014

• M. BastaniNejad, A. A. Elmustafa, E. Forman, J. Clark, S. Covert, J. Grames, J. Hansknecht, C. Hernandez-Garcia, M. Poelker, R. Suleiman, "Improving the Performance of Stainless-Steel DC High Voltage Photoelectron Gun Cathode Electrodes via Gas Conditioning with Helium or Krypton", Nuclear Instruments and Methods in Physics Research A 762 135 (2014), Media:gas conditioning electrodes_in print.pdf

• Md Abdullah A. Mamun, Abdelmageed A. Elmustafa, Marcy L. Stutzman, Philip A. Adderley, and Matthew Poelker, "Effect of heat treatments and coatings on the outgassing rate of stainless steel chambers”, Journal of Vacuum Science & Technology A 32, 021604 (2014), media:outgassing rate paper_in print.pdf

• J. L. McCarter, A. Afanasev, T. J. Gay, J. Hansknecht, A. Kechiantz, M. Poelker, "Measurement of Electron Beam Polarization from Unstrained GaAs via Two-Photon Photoemission", Nucl. Instr. and Meth. A738, 149 (2014), media:two photon paper_in print.pdf

2013

• N. B. Clayburn, J. L. McCarter, J. M. Dreiling, M. Poelker, D. M. Ryan, and T. J. Gay, "Search for spin-polarized photoemission from GaAs using light with orbital angular momentum", Phys. Rev. B 87, 035204 (2013) [8 pages ] media:twisted light paper_in print.pdf

• R. Mammei, R. Suleiman, J. Feingold, P. A. Adderley, J. Clark, S. Covert, J. Grames, J. Hansknecht, D. Machie, M. Poelker, T. Rao, J. Smedley, J. Walsh, J. McCarter, M. Ruiz-Osés,"Charge Lifetime Measurements at High Average Current Using a K2CsSb Photocathode inside a DC High Voltage Photogun", Phys. Rev. ST Accel. Beams, 16, 033401 (2013), media:CsK2Sb lifetime_in print.pdf

2012

• "An Engineering Guide To Photoinjectors", editors Triveni Rao and David H. Dowell. Chapter 8 on polarized electrons by M. Poelker, [11], media:An Engineering Guide to Photoinjectors.pdf

• B. Roberts, R.R. Mammei, M. Poelker, J.L. McCarter, "Compact non-invasive electron bunch-length monitor", Phys. Rev. ST Accel. Beams 15, 122802 (2012) [7 pages ], media:harmonic resonant cavity_in print.pdf

• M. BastaniNejad, Md. Abdullah Mohamed, A. A. Elmustafa, P. Adderley, J. Clark, S. Covert, J. Hansknecht, C. Hernandez-Garcia, M. Poelker, R. Mammei, K. Surles-Law, and P. Williams, "Evaluation of niobium as candidate electrode material for dc high voltage photoelectron guns", Phys. Rev. ST Accel. Beams 15, 083502 (2012) [11 pages], media:niobium electrodes_in print.pdf

• M. BastaniNejad, Md. Abdullah Mohamed, A. A. Elmustafa, P. Adderley, J. Clark, S. Covert, J. Hansknecht, C. Hernandez-Garcia, M. Poelker, R. Mammei, K. Surles-Law, and P. Williams, "Erratum: Evaluation of niobium as candidate electrode material for dc high voltage photoelectron guns [Phys. Rev. ST Accel. Beams 15, 083502 (2012)]", Phys. Rev. ST Accel. Beams 17, 029901 (2014) [1 page], media:erratum niobium electrode paper_corrected values for the emission area of field emitters.pdf

• V. Shutthanandan, Z. Zhu, M.L. Stutzman, F.E. Hannon, C. Hernandez-Garcia, M.I. Nandasiri, S.V.N.T. Kuchibhatla, S. Thevuthasan, and W.P. Hess "Surface science analysis of GaAs photocathodes following sustained electron beam delivery", Phys. Rev. ST Accel. Beams 15, 063501 (2012)] media:analysis of used photocathodes_in print.pdf

2011

• J. Grames, R. Suleiman, P. A. Adderley, J. Clark, J. Hansknecht, D. Machie, M. Poelker, and M. L. Stutzman, "Charge and fluence lifetime measurements of a DC high voltage GaAs photogun at high average current", Phys. Rev. ST Accel. Beams 14, 043501 (2011), media:high current lifetime_in print.pdf

2010

• P. A. Adderley, J. Clark, J. Grames, J. Hansknecht, K. Surles-Law, D. Machie, M. Poelker, M. L. Stutzman, and R. Suleiman, "Load-locked dc high voltage GaAs photogun with an inverted-geometry ceramic insulator", Phys. Rev. ST Accel. Beams 13, 010101 (2010), media:invgun_in print.pdf

• J.L. McCarter, M.L.Stutzman, K.W.Trantham, T.G.Anderson, A.M.Cook, and T.J.Gay, "A low-voltage retarding-field Mott polarimeter for photocathode characterization", Nucl. Instr. and Meth., A618 (2010) 30 media:miniMott_in print.pdf

2009

• J. Grames, J. Hansknect, M. Poelker, R. Suleiman, "Jefferson Lab Injector Development for Next Generation Parity Violation Experiments", European Journal of Hyperfine Interactions 2009 media: pavi09_suleiman.pdf

2007

• M. Poelker, J. Grames, J. Hansknecht, R. Kazimi, J. Musson, "Generation of Electron Bunches at Low Repetition Rates Using a Beat-Frequency Technique", Phys. Rev. ST Accel. Beams 10, 053502 (2007) media:beat frequency paper_in print.pdf

• M.L. Stutzman, P. Adderley, J. Brittian, J. Clark, J. Grames, J. Hansknecht, G.R. Myneni, M. Poelker, "Characterization of the CEBAF 100 kV DC GaAs Photoelectron Gun Vacuum System", Nucl. Instr. And Meth. A574, 213 (2007), media:CEBAF vacuum_in print.pdf

• C. K. Sinclair, M. Poelker, P. A. Adderley, B. M. Dunham, J. C. Hansknecht, P. Hartmann, J. S. Price, P. M. Rutt, W. J. Schneider, and M. Steigerwald, "A High Average Current Polarized Electron Source with Long Cathode Operational Lifetime", Phys. Rev. ST Accel. Beams 10, 023501 (2007) media:CEBAF source paper_in print.pdf

2006

• J. Hansknecht and M. Poelker, "Synchronous Photoinjection Using a Frequency-Doubled Gain-Switched Fiber-Coupled Seed Laser and ErYb-Doped Fiber Amplifier", Phys. Rev. ST Accel. Beams 9, 063501 (2006) media:gain switched fiber laser MOPA_in print.pdf

2005

• M. Baylac, P. Adderley, J. Brittian, J. Clark, T. Day, J. Grames, J. Hansknecht, M. Poelker, M. Stutzman, A.S. Terekhov and A.T. Wu, "The Effects of Atomic Hydrogen and Deuterium Exposure on High Polarization GaAs Photocathodes", Phys. Rev. ST Accel. Beams 8, 123501 (2005) media:hydrogen cleaning paper_in print.pdf

2004

• J. M. Grames, C. K. Sinclair, J. Mitchell, E. Chudakov, H. Fenker, A. Freyberger, D. W. Higinbotham, M. Poelker, M. Steigerwald, M. Tiefenback, C. Cavata, S. Escoffier, F. Marie, T. Pussieux, P. Vernin, S. Danagoulian, V. Dharmawardane, R. Fatemi, K. Joo, M. Zeier, V. Gorbenko, R. Nasseripour, B. Raue, R. Suleiman, and B. Zihlmann, "Unique electron polarimeter analyzing power comparison and precision spin-based energy measurement", Phys. Rev. ST Accel. Beams 7, 042802 – Published 19 April 2004; Erratum Phys. Rev. ST Accel. Beams 13, 069901 (2010) media:PhysRevSTAB.7.042802.pdf

2003

M.L. Stutzman, P. Adderley, M. Poelker, M. Baylac, J. Clark, A. Day, J. Grames, J. Hansknecht, G.R. Myneni, P.M. Rutt, C.K. Sinclair "A Comparison of Outgassing Measurments for Three Vacuum Chamber Materials", American Institute of Physcis (2003) 300 - 306 media: 2003 Hydrogen in vacuum.pdf

1998

• C. Hovater and M. Poelker, "Injection Modelocked Ti-Sapphire Laser with Discreetly Variable Pulse Repetition Rates to 1.56 GHz", Nucl. Instr. And Meth. A418, 280 (1998) media:harmonic modelocked ti_sapphire laser_in print.pdf

1995

• M. Poelker, "High Power Gain Switched Diode Laser Master Oscillator and Amplifier", Appl. Phys. Lett. 67, 2762 (1995), media:gainswitched diode MOPA_in print.pdf