CIS Refereed Publications

2015

• C. Hernandez-Garcia, M. Poelker, and J. Hansknecht, "High Voltage Studies of Inverted-geometry Ceramic Insulators for a 350kV dc Polarized Electron Gun", accepted for publication IEEE Transactions on Dielectrics and Electrical Insulation, preprint here Media:High voltage studies preprint.pdf

• 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

• 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

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

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