CIS Refereed Publications

2022

• S. A. K. Wijethunga, M. A. Mamun, R. Suleiman, C. Hernandez-Garcia, B. Bullard, J. R. Delayen, J. Grames, G. A. Krafft, G. Palacios-Serrano, and M. Poelker, "Improving the electrostatic design of the Jefferson Lab 300 kV DC photogun", Rev. Sci. Instrum. 93, 073303 (2022); doi: 10.1063/5.0091134 media:Sajini offset anode.pdf

• Xi Li, Helmut Baumgart, Charles Bott, Gianluigi Ciovati, Shaun Gregory, Fay Hannon, Mike McCaughan, Robert Pearce, Matthew Poelker, Hannes Vennekate, and Shaoheng Wang, "Design and commissioning of an e-beam irradiation beamline at the Upgraded Injector Test Facility at Jefferson Lab", Nucl. Inst. and Meth. A1039, 167093 (2022); https://doi.org/10.1016/j.nima.2022.167093 media:Xi's UITF water irradiation NIM paper.pdf

2020

• J. Arrington, M. Battaglieri, A. Boehnlein, S.A. Bogacz, W.K. Brooks, E. Chudakov, I. Cloet, R. Ent, H. Gao, J. Grames, L. Harwood, X.Ji, C.Keppel, G.Krafft, R.D. McKeown, J. Napolitano, J.W. Qiu, P. Rossi, M. Schram, S. Stepanyan, J. Stevens, A.P. Szczepaniak, N. Toro, X. Zheng, "Physics with CEBAF at 12 GeV and Future Opportunities", to be submitted to X. Submitted to arXiv https://arxiv.org/abs/2112.00060.

• Wei Liu, Matt Poelker, John Smedley, Romain Ganter, Chapter 7 "Photocathodes" in the book Modern Developments in Vacuum Electron Sources, media:Chapter 7.pdf, Editors: Georg Gaertner, Wolfram Knapp, Richard G. Forbes, SSN 0303-4216ISSN 1437-0859 (electronic) Topics in Applied Physics ISBN 978-3-030-47290-0ISBN 978-3-030-47291-7 (eBook) https://doi.org/10.1007/978-3-030-47291-7 Springer Nature Switzerland AG 2020

• Y. Wang, M. A. Mamun, P. Adderley, B. Bullard, J. Grames, J. Hansknecht, C. Hernandez-Garcia, R. Kazimi, G. A. Krafft, G. Palacios-Serrano, M. Poelker, M. L. Stutzman, R. Suleiman, M. Tiefenback, S. Wijethunga, J. Yoskowitz, and S. Zhang, "Thermal emittance and lifetime of alkali-antimonide photocathodes grown on GaAs and molybdenum substrates evaluated in a -300 kV dc photogun", Phys. Rev. Accel. Beams 23, 103401, Published 7 October 2020 [1], media:Yan's photocathode paper_PRAB.pdf

• J. M. Grames, C. K. Sinclair, M. Poelker, X. Roca-Maza, M. L. Stutzman, R. Suleiman, Md. A. Mamun, M. McHugh, D. Moser, J. Hansknecht, B. Moffit, and T. J. Gay, "High precision 5 MeV Mott polarimeter", Phys. Rev. C 102, 015501 – Published 6 July 2020 media:PhysRevC.102.015501.pdf

• G.Ciovati, M.Drury, J.Fischer, M.Stutzman and S.Suhring, “Reduction of waveguide vacuum trips in CEBAF accelerating cavities with a combination ion pump and non-evaporable getter pump” media:GigiNIM2020.pdf Nucl.Instrum. and Meth A964, (2020), 163788.

• Xincun Peng, Matt Poelker, Marcy Stutzman, Bin Tang, Shukui Zhang, and Jijun Zou, "Mie-type GaAs nanopillar array resonators for negative electron affinity photocathodes", collaboration between Engineering Research Center of New Energy Technology of Jiangxi Province, East China University of Technology, Nanchang 330013, China and Thomas Jefferson National Accelerator Facility, 12000 Jefferson Avenue, Newport News, Virginia 23606,USA; Opt. Express 28(2), 860-874 (2020); https://www.osapublishing.org/DirectPDFAccess/11F39DCB-BEE0-C06D-739FEF3676B92DCF_425659/oe-28-2-860.pdf?da=1&id=425659&seq=0&mobile=no; media:nanostructured photocathode paper_theoretical study.pdf

2019

• Xincun Peng, Zhidong Wang, Yun Liu, Dennis M. Manos, Matt Poelker, Marcy Stutzman, Bin Tang, Shukui Zhang, and Jijun Zou, "Optical-Resonance-Enhanced Photoemission from Nanostructured GaAs Photocathodes", Phys. Rev. Applied 12, 064002 (2019), https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.12.064002, media:nanostructured photocathode paper_experimental results.pdf

• Mark Stefani and Fay Hannon,"Longitudinal bunch profile diagnostic for magnetized electron beams", Phys. Rev. Accel. Beams 22, 112802 (2019); DOI: 10.1103/PhysRevAccelBeams.22.112802; media:Mark and Ray rf deflector paper.pdf

• Fay Hannon and Mark Stefani, "Transverse uncorrelated emittance diagnosticfor magnetized electron beams", Phys. Rev. Accel. Beams 22,102801 (2019), https://journals.aps.org/prab/pdf/10.1103/PhysRevAccelBeams.22.102801

• C. Hernandez-Garcia, B. Bullard, J. Benesch, J. Grames, J. Gubeli, F. Hannon, J. Hansknecht, J. Jordan, R. Kazimi, G. A. Krafft, M. A. Mamun, M. Poelker, M. L. Stutzman, R. Suleiman, M. Tiefenback, Y. Wang, and S. Zhang (Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA); A. Valerio Lizarraga (Facultad de Ciencias Físico-matemáticas Universidad Autónoma de Sinaloa, Culiacán 80010, Mexico); R. Montoya Soto (Departamento de Física, Universidad de Guanajuato, León 37150, Mexico); A. Canales Ramos (Universidad Nacional Autónoma de Mexico, Mexico City 04510, Mexico), G. Palacios-Serrano, S. Wijethunga, J. T. Yoskowitz (Old Dominion University, Norfolk, Virginia 23529, USA) "Compact −300kV dc inverted insulator photogun with biased anode and alkali-antimonide photocathode", Phys. Rev. Accel. Beams 22, 113401 (2019), DOI:10.1103/PhysRevAccelBeams.22.113401, https://journals.aps.org/prab/pdf/10.1103/PhysRevAccelBeams.22.113401, media:GTS paper published in PRAB 2019.pdf

• 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 at JLab using the original hydrogen cleaning chamber, 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: [2], 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) [3],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), [4], 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), [5], 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), [6], 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), [7], 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), [8], 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), [9], 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 [10], 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), [11], 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

• THE INTERNATIONAL LINEAR COLLIDER, Technical Design Report | Volume 3.ii: Accelerator Baseline Design, see Chapter 4 [12]

• 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, [13], 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

• Y C Chao, M Drury, C Hovater, A Hutton, G A Krafft, M Poelker, C Reece and M Tiefenback, Chapter 15: "CEBAF Accelerator Achievements" in "New Insights into the Structure of Matter: The First Decade of Science at Jefferson Lab" https://iopscience.iop.org/issue/1742-6596/299/1 media:CEBAF Accelerator Achievements.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