Publications
2010
2009
2008
Aperture effects and mismatch oscillations in an intense electron beam, J.R Harris, P.G. O’Shea, Phys. Plasmas 15, 123106 (2008)
Multicomponent measurements of the Jefferson Lab energy recovery linac electron beam using optical transition and diffraction radiation M.A. Holloway, R.B. Fiorito, A.G. Shkvarunets, P. G. O’Shea, S.V. Benson, D. Douglas, P. Evtushenko, and K. Jordan Phys. Rev. ST Accel. Beams 11, 082801 (2008)
Theory of photoemission from cesium antimonide using an alpha-semiconductor model, K L Jensen, BL Jensen, EJ Montgomery, DW Feldman, PG O'Shea, and NA Moody, J. Appl. Phys. 104, 044907 (2008); DOI:10.1063/1.296782
Electron emission contributions to dark current and its relation to microscopic field enhancement and heating in accelerator structures, K L. Jensen, Y. Y. Lau, D. W. Feldman and P. G. O’Shea, Phys. Rev. ST Accel. Beams 11, 081001 (2008)
Application
of a general electron emission equation to surface nonuniformity and current
density variation
KL Jensen,
JJ Petillo,
EJ Montgomery, ZG Pan, DW
Feldman
PG
O'Shea, NA Moody,
M. Cahay,
JE Yater,
JL Shaw J.
Vac. Sc. & Tech B, 26, 831 (2008)
Negative transconductance in apertured electron guns, J. R. Harris and P. G O'Shea ,J. Appl. Phys. 103, 113301 (2008)
Time-Dependent Imaging of Space-Charge-Dominated Electron Beams, K. Tian, R.A. Kishek, P.G. O'Shea, R.B. Fiorito, D.W. Feldman, and M. Reiser, Physics of Plasmas 15, 056707 (2008).
2007
Longitudinal density modulation and energy conversion in intense beams J. R. Harris, J. G. Neumann, K. Tian, and P. G. O’Shea, Phys. Rev. E, 76 026402 (2007)
Scaled electron experiments at the University of Maryland, I. Haber, G. Bai, S. Bernal, B. Beaudoin, D. Feldman, R. Fiorito, T.F. Godlove, R. A. Kishek, P.G. O'Shea, B. Quinn, C. Papadopoulos, M. Reiser, J. Rodgers, D. Stratakis, D. Sutter, K. Tian, C.J. Tobin, M. Walter, and C. Wu," Nuclear Instruments and Methods A 577, 150-156 (2007).
Measurement and Simulation of the time dependent behavior of the UMER source I . Haber, D. Feldman, R. Fiorito, A. Friedman, D.P. Grote, R.A. Kishek, P.G. O'Shea, B. Quinn, M. Reiser, J. Rodgers, D. Stratakis, K. Tian, J.-L. Vay, and M. Walter, Nuclear Instruments and Methods A 577, 157-160 (2007).
R.A. Kishek, G. Bai, B. Beaudoin, S. Bernal, D. Feldman, R. Feldman, R. Fiorito, T.F. Godlove, I. Haber, T. Langford, P.G. O'Shea, B. Quinn, C. Papadopoulos, M. Reiser, D. Stratakis, D. Sutter, K. Tian, J.C.T. Thangaraj, M. Walter, and C. Wu, "The University of Maryland Electron ring (UMER) Enters a New Regime of High-Tune-Shift Rings," Proceedings of the 2007 IEEE Particle Accelerator Conference, Albuquerque, NM, ed. C. Petit-Jean-Genaz, IEEE Cat. No. 07CH37866, 820 (2007).
D. Stratakis, R.A. Kishek, I. Haber, M. Walter, R.B. Fiorito, S. Bernal, J.C.T. Thangaraj, K. Tian, C. Papadopoulos, M. Reiser, and P.G. O’Shea, "Phase Space Tomography of Beams with Extreme Space Charge," Proceedings of the 2007 IEEE Particle Accelerator Conference, Albuquerque, NM, ed. C. Petit-Jean-Genaz, IEEE Cat. No. 07CH37866, 2025 (2007).
B.L. Beaudoin, S. Bernal, I. Haber, R.A. Kishek, P.G. O'Shea, M. Reiser, J.C.T. Thangaraj, K. Tian, M. Walter, and C. Wu, "Application of Induction Module for Energy Perturbations in the University of Maryland Electron Ring," Proceedings of the 2007 IEEE Particle Accelerator Conference, Albuquerque, NM, ed. C. Petit-Jean-Genaz, IEEE Cat. No. 07CH37866, 2322 (2007).
S. Bernal, B. Beaudoin, R.A. Kishek, M. Reiser, D. Sutter, and P.G. O’Shea, "Low-current, Space-Charge Dominated Beam Transport at the University of Maryland Electron Ring (UMER)," Proceedings of the 2007 IEEE Particle Accelerator Conference, Albuquerque, NM, ed. C. Petit-Jean-Genaz, IEEE Cat. No. 07CH37866, 3561 (2007).
R.B. Fiorito, B.L. Beaudoin, S. Casey, D. Feldman, P.G. O'Shea, and B. Quinn, "OTR Measurements of the 10 keV Electron Beam at the University of Maryland Electron Ring (UMER)," Proceedings of the 2007 IEEE Particle Accelerator Conference, Albuquerque, NM, ed. C. Petit-Jean-Genaz, IEEE Cat. No. 07CH37866, 4006 (2007).
I. Haber, S. Bernal, R.A. Kishek, P.G. O'Shea, C. Papadopoulos, M. Reiser, R. B. Feldman, D. Stratakis, M. Walter, J.-L. Vay, A. Friedman, and D.P. Grote, "Measurement and Simulation of Source-Generated Halos in the University of Maryland Electron Ring," Proceedings of the 2007 IEEE Particle Accelerator Conference, Albuquerque, NM, ed. C. Petit-Jean-Genaz, IEEE Cat. No. 07CH37866, 3564 (2007).
J.R. Harris, R.B. Feldman, and P.G. O'Shea, "Transverse-Longitudinal Coupling in an Intense Electron Beam," Proceedings of the 2007 IEEE Particle Accelerator Conference, Albuquerque, NM, ed. C. Petit-Jean-Genaz, IEEE Cat. No. 07CH37866, 3597 (2007).
C. Papadopoulos, G. Bai, R.A. Kishek, I. Haber, M. Walter, B. Beaudoin, P.G. O'Shea, and M. Reiser, "Modeling Skew Quadrupole Effects on the UMER Beam," Proceedings of the 2007 IEEE Particle Accelerator Conference, Albuquerque, NM, ed. C. Petit-Jean-Genaz, IEEE Cat. No. 07CH37866, 3567 (2007).
J.C.T. Thangaraj, G. Bai, B.L. Beaudoin, S. Bernal, D. Feldman, R. Fiorito, I. Haber, R.A. Kishek, P.G. O'Shea, M. Reiser, D. Stratakis, K. Tian, and M. Walter, "Evolution of Laser Induced Perturbation and Experimental Observation of Space Charge Waves in the University of Maryland Electron Ring (UMER)," Proceedings of the 2007 IEEE Particle Accelerator Conference, Albuquerque, NM, ed. C. Petit-Jean-Genaz, IEEE Cat. No. 07CH37866, 3570 (2007).
K. Tian, G. Bai, B.L. Beaudoin, D. Feldman, R.B. Fiorito, I. Haber, R.A. Kishek, P.G. O'Shea, M. Reiser, D. Stratakis, D. Sutter, J.C.T. Thangaraj, M. Walter, and C. Wu, "Fast Imaging of Time-dependent Distributions of Intense Beams," Proceedings of the 2007 IEEE Particle Accelerator Conference, Albuquerque, NM, ed. C. Petit-Jean-Genaz, IEEE Cat. No. 07CH37866, 3573 (2007).
M. Walter, G. Bai, B.L. Beaudoin, S. Bernal, D. Feldman, T. Godlove, I. Haber, R.A. Kishek, P.G. O'Shea, C. Papadopoulos, B. Quinn, M. Reiser, D. Stratakis, J.C.T. Thangaraj, and C. Wu, "Beam Extraction Concepts and Design for the University of Maryland Electron Ring (UMER)," Proceedings of the 2007 IEEE Particle Accelerator Conference, Albuquerque, NM, ed. C. Petit-Jean-Genaz, IEEE Cat. No. 07CH37866, 1754 (2007).
M. Walter, G. Bai, B.L. Beaudoin, S. Bernal, D. Feldman, T. Godlove, I. Haber, R.A. Kishek, P.G. O'Shea, C. Papadopoulos, B. Quinn, M. Reiser, D. Stratakis, D. Sutter, J.C.T. Thangaraj, and C. Wu, "Multi-turn Operation of the University of Maryland Electron Ring (UMER)," Proceedings of the 2007 IEEE Particle Accelerator Conference, Albuquerque, NM, ed. C. Petit-Jean-Genaz, IEEE Cat. No. 07CH37866, 1751 (2007).
C. Wu, E. Abed, G. Bai, B. Beaudoin, S. Bernal, I. Haber, R. Kishek, P. O'Shea, M. Reiser, D. Stratakis, D. Sutter, K. Tian, and M. Walter, "A Robust Orbit-Steering and Control Algorithm Using Quadrupole-scans as a Diagnostic," Proceedings of the 2007 IEEE Particle Accelerator Conference, Albuquerque, NM, ed. C. Petit-Jean-Genaz, IEEE Cat. No. 07CH37866, 509 (2007).
2006
Theoretical model of the intrinsic emittance of a photocathode, K. L. Jensen P. G. O'Shea, D. W. Feldman, and N. A. Moody, Applied Physics Letters. 89, 224103 (2006)
Fixed-Geometry RMS Envelope Matching of Electron Beams from 'Zero' Current to Extreme Space-Charge, S. Bernal, H. Li, R.A. Kishek, B. Quinn, M. Walter, M. Reiser, P.G. O'Shea, and C.K. Allen, Physical Review ST - Accelerators & Beams 9, 064202 (2006).
Tomography as a Diagnostic Tool for Phase Space Mapping of Intense Particle Beams, D. Stratakis, R.A. Kishek, H. Li, S. Bernal, M. Walter, B. Quinn, M. Reiser, and P.G. O'Shea, Physical Review Special Topics - Accelerators & Beams 9, 112801 (2006).
Gridded Electron Guns and Modulation of Intense Beams, J.R. Harris and P.G. O'Shea, IEEE Transactions on Electron Devices 53(11), 2824-2829 (2006).
A photoemission model for low work function coated metal surfaces and its experimental validation, Kevin L. Jensen, Donald W. Feldman, Nathan A. Moody, and Patrick G. O'Shea, J. Appl. Phys. 99, 124905 (2006)
Field-enhanced photoemission from metals and coated materials, Kevin L. Jensen, Donald W. Feldman, Nathan A. Moody, and Patrick G. O'Shea, Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures 863, (2006)
Governing factors for production of photoemission-modulated electron beams J. R. Harris, J. G. Neumann, and P. G. O'Shea, J. Appl. Phys. 99, 093306 (2006)
Invited: "New Developments In Space-Charge Beam Physics Research at the University Of Maryland Electron Ring (UMER), S. Bernal, G. Bai, B. Beaudoin, D. Feldman, R. Feldman, R. Fiorito, T.F. Godlove, I. Haber, R.A. Kishek, C. Papadopoulos, B. Quinn, M. Reiser, D. Stratakis, D. Sutter, K. Tian, J.C.T. Thangaraj, M. Walter, C. Wu, and P.G. O'Shea, Proceedings of 12th Workshop on Advanced Accelerator Concepts (AAC), Lake Geneva, WI, 10-15 July, 2006, ed., Manoel Conde and Catherine Eyberger, (New York: AIP Press 877, 2006), p. 94.
Modeling and Experiments on Injection into University of Maryland Electron Ring, G. Bai, R.A. Kishek, B. Beaudoin, S. Bernal, D. Feldman, T. Godlove, I. Haber, B. Quinn, M. Reiser, D. Sutter, M. Walter, and P.G. O'Shea, Proceedings of 12th Workshop on Advanced Accelerator Concepts (AAC), Lake Geneva, WI, 10-15 July, 2006, ed., Manoel Conde and Catherine Eyberger, (New York: AIP Press 877, 2006), p. 582.
Rotational Mismatches and Emittance Growth for the UMER Beam C. Papadopoulos, R.A. Kishek, I. Haber, P.G. O'Shea, and M. Reiser, "Rotational Mismatches and Emittance Growth for the UMER Beam, Proceedings of 12th Workshop on Advanced Accelerator Concepts (AAC), Lake Geneva, WI, 10-15 July, 2006, ed., Manoel Conde and Catherine Eyberger, (New York: AIP Press 877, 2006), p. 227.
Phase Space Tomography: A Simple, Portable and Accurate Technique to Map Phase Spaces of Beams with Space Charge, D. Stratakis, R.A. Kishek, H. Li, S. Bernal, M. Walter, I. Haber, R. Fiorito, J.C.T. Thangaraj, B. Quinn, M. Reiser, and P.G. O'Shea, Proceedings of 12th Workshop on Advanced Accelerator Concepts (AAC), Lake Geneva, WI, 10-15 July, 2006, ed., Manoel Conde and Catherine Eyberger, (New York: AIP Press 877, 2006), p. 680.
Beam Injection and Matching Studies at the University of Maryland Electron Ring, Jayakar C.T. Thangaraj, R.A. Kishek, S. Bernal, M. Reiser, D. Stratakis, M. Walter, B. Quinn, D. Sutter, B. Beaudoin, C. Papadopoulos, G. Bai, C. Wu, and P.G. O'Shea, "Proceedings of 12th Workshop on Advanced Accelerator Concepts (AAC), Lake Geneva, WI, 10-15 July, 2006, ed., Manoel Conde and Catherine Eyberger, (New York: AIP Press 877, 2006), p. 687.
Experimental Observations of Beam Fluctuations in Space-Charge Dominated Beams, K. Tian, Y. Zou, Y. Cui, I. Haber, R.A. Kishek, M. Reiser, and P.G. O'Shea, Proceedings of 12th Workshop on Advanced Accelerator Concepts (AAC), Lake Geneva, WI, 10-15 July, 2006, ed., Manoel Conde and Catherine Eyberger, (New York: AIP Press 877, 2006), p. 461.
Beam Control and Steering in the University of Maryland Electron Ring M. Walter, G. Bai, S. Bernal, D. Feldman, T. Godlove, I. Haber, M. Holloway, R.A. Kishek, P.G. O'Shea, C. Papadopoulos, B. Quinn, M. Reiser, D. Stratakis, D. Sutter, J. Thangaraj, M. Wilson, and C. Wu, Proceedings of 12th Workshop on Advanced Accelerator Concepts (AAC), Lake Geneva, WI, 10-15 July, 2006, ed., Manoel Conde and Catherine Eyberger, (New York: AIP Press 877, 2006), p. 701.
Transverse Phase Space Reconstruction and Emittance Measurement of Intense Electron Beam Using A Tomography Technique, D. Stratakis, R.A. Kishek, H. Li, S. Bernal, M. Walter, J. Tobin, B. Quinn, M. Reiser, and P.G. O'Shea, Proceedings of the 12th Beam Instrumentation Workshop (BIW), Batavia, IL, 1-4 May 2006, ed., Thomas S. Meyer and Robert Webber, (New York: AIP Press 868, 2006), p. 497.
Benchmarking Space Charge Codes Against UMER Experiments, R.A. Kishek, G. Bai, B. Beaudoin, S. Bernal, D. Feldman, R. Fiorito, T.F. Godlove, I. Haber, P.G. O'Shea, B. Quinn, C. Papadopoulos, M. Reiser, D. Stratakis, D. Sutter, K. Tian, J.C.T. Thangaraj, M. Walter, and C. Wu, Proceedings of the 2006 International Computational Accelerator Physics Conference (ICAP), Chamonix, France, Oct 2006 WEA3MP03, 263 (2006).
Invited: Scaled Models: Space-Charge Dominated Electron Storage Rings, R.A. Kishek, G. Bai, S. Bernal, D. Feldman, T.F. Godlove, I. Haber, P.G. O'Shea, B. Quinn, C. Papadopoulos, M. Reiser, D. Stratakis, K. Tian, C.J. Tobin, and M. Walter, Proc. ICFA Workshop on the Physics and Applications of High Brightness Electron Beams, Oct. 2005, Erice, Italy, to appear (2006).
2005
2004
2003
· Optical Diffraction-Transition Radiation Interferometry and Its Application to the Measurement of Beam Divergence A. Shkvarunets, R. Fiorito, and P.G. O'Shea, Nuclear Instruments and Methods B 201(1), 153-160 (2003).
· Progress in heavy ion fusion research, C. M. Celata, F. M. Bieniosek, E. Henestroza, J. W. Kwan, E. P. Lee, G. Logan, L. Prost, P. A. Seidl, J-L. Vay, W. L. Waldron, and S. S. Yu, J. J. Barnard, D. A. Callahan, R. H. Cohen, A. Friedman, D. P. Grote, S. M. Lund, A. Molvik, W. M. Sharp, and G. Westenskow, Ronald C. Davidson, Philip Efthimion, Erik Gilson, L. R. Grisham, Igor Kaganovich, Hong Qin, and Edward A. Startsev, S. Bernal, Y. Cui, D. Feldman, T. F. Godlove, I. Haber, J. Harris, R. A. Kishek, H. Li, P. G. O'Shea, B. Quinn, M. Reiser, A. Valfells, M. Walter, and Y. Zou, D. V. Rose and D. R. Welch, Physics of Plasmas, 10, 2064 (2003)
2002
· Compact high-resolution retarding field energy analyzer for space-charge-dominated electron beams Y. Zou, Y. Cui, V. Yun, A. Valfells, R. A. Kishek, S. Bernal, I. Haber, M. Reiser, P. G. O'Shea, and J. G. Wang, Phys. Rev. ST-AB 5, 072801 (2002)
· Edge imaging in intense beams S. Bernal, B. Quinn, M. Reiser, and P. G. O'Shea, Phys. Rev. ST-AB, 5, 064202 (2002)
· Effects of pulse-length and emitter area on virtual cathode formation in electron guns, Ágúst Valfells, D. W. Feldman, M. Virgo, P. G. O'Shea, and Y. Y. Lau, Phys. Plasmas 9, 2377 (2002)
· A Polychromatic FEL Light Source Using a Single Electron Beam and Multiple Wigglers..P. Freund, P.G. O’Shea, Nuclear Instruments and Methods A 483, 449-454 (2002)
· A generalized electron emission model for field, thermal, and photo-emission K. L. Jensen, P.G. O’Shea, D. W. Feldman, Applied Physics Letters 81, 3867-3869 (2002)
· End-to-end Simulation: The Front End, I. Haber, F. M. Bieniosek, C. M. Celata, A. Friedman, D. P. Grote, E. Henestroza, J. -L. Vay, S. Bernal, R. A. Kishek, P. G. O’Shea, M. Reiser, W. B. Herrmannsfeldt , Laser and Particle Beams, 20 599 (2002)
· Compact high-resolution retarding field energy analyzer for space-charge-dominated electron beams Y. Zou, Y. Cui, V. Yun, A. Valfells, R. A. Kishek, S. Bernal, I. Haber, M. Reiser, P. G. O'Shea, and J. G. Wang, Phys. Rev. ST-AB 5, 072801 (2002)
· Edge imaging in intense beams S. Bernal, B. Quinn, M. Reiser, and P. G. O'Shea, Phys. Rev. ST-AB, 5, 064202 (2002)
2001
· Free-Electron Lasers: Status and Applications, Science, 292, 1853 (2001)
· Transverse Space Charge modes in Nonequilribium Beams R.A. Kishek, S. Bernal, P.G. O’Shea plus M. Reiser, I Haber, Nuclear Instruments and Methods A464, 484-492 (2001),
· The University of Maryland electron Ring (UMER), P.G. O’Shea M. Reiser, R.A. Kishek, S. Bernal, H. Li, M. Pruessner V. Yun, Y. Cui, W. Zhang, Y. Zou, T. Godlove, D. Kehne, P. Haldemann, Nuclear Instruments and Methods A464, 646, (2001)
· Injector for the University of Maryland Electron Ring , D. Kehne, T. Godlove, P. Haldemann, S. Bernal, S. Guharay, R. Kishek, Y. Li, P. O’Shea, M. Reiser, V. Yun, Y. Zou, I. Haber, Nuclear Instruments and Methods, A464, 605-609 (2001).
2000
· Coherent off–axis undulator radiation from short electron bunches C.P. Neuman, W. S. Graves, P.G. O’Shea, Physical Review ST-AB, 3 030701 (2000)
· Two-color operation in high-gain free-electron lasers H. P. Freund and P.G. O’Shea, Physical Review Letters, 84 2861 (2000)
· Energy Transfer in Nonequilribium Space-Charge-Dominated Beams R.A. Kishek, P.G. O’Shea, M. Reiser, Physical Review Letters. 85, 4514 (2000)
Design and Field Measurements of Printed-Circuit Quadrupoles and Dipoles, WW. Zhang, H. Li, S. Bernal, T. Godlove, R.A Kishek, P.G. O’Shea, M. Reiser, M. Venturini, V. Yun, Physical Review ST-AB 3, 122401 (2000)
1999
· Electron Beam Matching and its Influence on the Performance of High-Gain Free-Electron Laser Amplifier Performance. H.P. Freund and P.G. O'Shea. Nuclear Instruments and Methods in Physics Research, Vol. A429, pg. 219 (1999).
· The Maryland Electron Ring for Investigating Space-Charge Dominated Beams in a Circular FODO System. M. Reiser, P. G. O'Shea, R. A. Kishek, S. Bernal, P. Chin, S. Guharay, Y. Li, M. Venturini, J. G. Wang, V. Yun, W. Zhang, Y. Zou, M. Pruessner, T. Godlove, D. Kehne, P. Haldemann, H. Nishimura. . Proceedings of the 1999 Particle Accelerator Conference, New York NY, pg. 234 (1999).
· A Non-Interrupting Electron Beam Diagnostic Using Coherent Off-Axis Undulator Radiation. C.P. Neuman, W. S. Graves, P. G. O'Shea. Proceedings of the 1999 Particle Accelerator Conference, New York NY, pg. 1949 (1999).
· Electron Beam Matching and its Influence on the Performance of High-Gain Free-Electron Laser Amplifier Performance H.P. Freund and P.G. O'Shea. Nucl. Instr. Meth, Vol. A429, pg. 219 (1999).
· A Non-Destructive Electron Beam Diagnostic for a SASE FEL using Coherent Undulator Radiation from a Short Undulator. C. Neuman, M. Ponds, G. Barnett, J. Madey, P. G. O'Shea. Nucl. Instr. Meth, A429, pg. 287 (1999).
1998
· Reversible and irreversible emittance growth in charged particle beams P. G. O’Shea. Physical Review E, 57, pg. 1081 (1998).
· The effect of a matched electron beam on high-gain free-electron-laser amplifier performance, H.P. Freund and P.G. O'Shea. Physical Review Letters, 80, pg. 520 (1998).
· Production of Radioisotopes via Direct Electron Activation . K.J. Weeks and P.G. O’Shea. Medical Physics, Vol. 25, pg. 488 (1998).
· Free-Electron Lasers - A Bright Light Source for the Future. P.G. O’Shea. Invited review in Optics and Photonics News, May 1998.
· RF Photoinjector Using a LaB6 Cathode and a Nitrogen Drive-Laser P.G O’Shea, J.A. Lancaster and C.R Jones. Applied Physics Letters, Vol. 73, pg. 411 (1998).
· Thirty Mega-Watt Klystron Modulator Development at the Duke University Free-Electron Laser Laboratory. Richard J. Sachtschale, P.G. O'Shea, G. Swift. Proceedings of the 1997 Particle Accelerator Conference, Vancouver BC, pg. 1278 (1998).
· Coherent Synchrotron Radiation Induced Emittance Growth in a Chicane Buncher. David H. Dowell and P. G. O'Shea. Proceedings of the 1997 Particle Accelerator Conference, Vancouver BC, pg. 1891 (1998).
· A High Resolution Electron Beam Profile Monitor. W. S. Graves, E. D. Johnson, P. G. O'Shea. Proceedings of the 1997 Particle Accelerator Conference, Vancouver BC, pg. 1993 (1998).
· Single Bunch Injection System for an Electron Storage Ring Using an RF Photoinector. P. G. O'Shea, J. A. Lancaster, J. M. Madey, R. Sachtshale, C. R. Jones. . Proceedings of the 1997 Particle Accelerator Conference, Vancouver BC, pg. 2799 (1998).
1997
· Gamma-Ray Production in a Storage Ring Free-Electron Laser. V. N. Litvinenko, B. Burnham, M. Emamian, N. Hower, J. M. J. Madey, P. Morcombe, P. G. O'Shea, S. H. Park, R. Sachtschale, K. D. Straub, G. Swift, P. Wang, Y. Wu , R. S. Canon, C. R. Howell, N. R. Roberson, E. C. Schreiber, M. Spraker, W. Tornow, H. R. Weller , I. V. Pinayev, N. G. Gavrilov, M. G. Fedotov, G. N. Kulipanov, G. Y. Kurkin, S. F. Mikhailov, V. M. Popik, A. N. Skrinsky, and N. A. Vinokurov, B. E. Norum , A. Lumpkin and B. Yang. Physical Review Letters, Vol.78, pg. 4569 (1997).
· Short wavelength SASE using the Paladin Wiggler. P.G. O’Shea, C.P. Neuman, J.M.J. Madey, H.P. Freund. Nuclear Instruments and Methods in Physics Research, Vol. A393, pg. 129 (1997).
· Radiographic Tomography using near monochromatic g -rays. E.C. Schreiber and P.G. O’Shea. Coherent Electron Beam X-ray Sources: Techniques and Applications, A. K Freund, H. P. Freund and M. Howells, editors, Proceedings of SPIE, Vol. 3154, pg. 94 (1997).
· Free-Electron Laser Challenges. P.G. O’Shea and H.E. Bennett, editors, Proceedings of SPIE, Vol. 2988 (1997), 294 pages.
· Free-electron laser technology and applications. P.G. O’Shea. Proceedings of the Topical Meeting on Nuclear Applications of Accelerator Technology, American Nuclear Society, pg. 65 (1997).
1996
· Picosecond Pump-Probe Using An FEL and A Synchrotron Source. G. Denbeaux, K.D. Straub, J.M.J Madey, P.G. O’Shea, V. Litvinenko, E. Szarmes, G. Barnett. Nuclear Instruments and Methods in Physics Research, Vol. A375, pg. 644 (1996).
· Non-Destructive Diagnosis of Relativistic Electron Beams Using a Short Undulator. M.L. Ponds, Y. Feng, J. M. J. Madey, P. G. O’Shea. Nuclear Instruments and Methods in Physics Research, Vol. A375, pg. 136 (1996).
· Commissioning of the Duke Storage
Ring. V.N. Litvinenko,
Y. Wu, B. Burnham, J.M.J. Madey, F. Carter, C.
Dickey, M. Emamian, J. Gustavsson,
N. Hower, P. Morcombe, S.H.
Park, P.G. O'Shea, R. Sachtschale, D. Straub, G.
Swift, P. Wang, J. Widgren. Proceedings of the 1995
Particle Accelerator Conference,
· RF Phasing of the Duke Linac. Ping Wang, Nelson Hower, Patrick G. O'Shea. Proceedings of the 1995 Particle Accelerator Conference, Dallas TX, pg. 932 (1996).
· Jitter Sensitivity in Photoinjectors. Patrick G. O'Shea. Proceedings of the 1995 Particle Accelerator Conference, Dallas TX, pg. 970 (1996).
· Accelerator Archeology - The Resurrection of the Stanford MARKIII Electron Linac at Duke . P.G. O'Shea, F. Carter, C. Dickey, N. Hower, V.N. Litvinenko, R. Sachtschale, G. Swift, P. Wang, Y. Wu, J.M.J. Madey. Proceedings of the 1995 Particle Accelerator Conference, Dallas TX, pg. 1090 (1996).
· In-House Repair of a 30 Megawatt S Band Klystron. R. Sachtschale, P.G. O'Shea, M. Ponds, G. Swift. Proceedings of the 1995 Particle Accelerator Conference, Dallas TX, pg. 536 (1996).
· EPICS at Duke University. C. Dickey, B. Burnham, F. Carter, R. Fricks, V. Litvinenko, A. Nagchaudhuri, P. Morcombe, R. Pantazis, P.G. O'Shea, R. Sachtschale, Y. Wu. Proceedings of the 1995 Particle Accelerator Conference, Dallas TX, pg. 2217 (1996).
· Entropy and Emittance Growth. P.G. O'Shea. Proceedings of the 1995 Particle Accelerator Conference, Dallas TX, pg. 2783 (1996).
Generalized Free-Energy Principle and Emittance Growth. P.G. O’Shea. Space Charge Dominated Beams and Application of High Brightness Beams, S.Y. Lee, editor, AIP Proceedings No. 277, pg. 309 (1996).
· Inverse Compton Gamma-Ray Source for Nuclear Physics and Related Applications. P.G. O’Shea, N. Litvinenko, J. M. J. Madey, N. R. Roberson, E. C. Schreiber, K. D. Straub, H. R. Weller, Y. Wu. Nuclear Instruments and Methods in Physics Research, Vol. A375, pg. 530 (1996).
· The TUNL-FELL Inverse Compton g -Ray Source as a Nuclear Physics Facility. T.S Carman, V. Litvinenko, J. Madey, C. Neuman, B. Norum, P.G. O’Shea, N. R. Roberson, C. Y. Scarlett, E. Schreiber, H. Weller. Nuclear Instruments and Methods in Physics Research, Vol. A378, pg. 1 (1996).
1995
Picosecond pump-probe using an FEL and synchrotron source. K.D. Straub, J.M. Madey, P.G. O'Shea, V. N. Litvinenko, E.B. Szarmes, G.A. Barnett. Electron-Beam Sources and Charged-Particle Optics, Eric Munro and Henry P. Freund editors, Proceedings of SPIE, Vol. 2522, pg. 468 (1995).
Entropy, reversible and irreversible emittance growth. P.G. O'Shea. Electron-Beam Sources and Charged-Particle Optics, Eric Munro and Henry P. Freund editors, Proceedings of SPIE, Vol. 2522, pg. 527 (1995).
Phase Space Tomography of Relativistic Electron Beams. C.B. McKee, P.G. O'Shea, J. M. J. Madey. Nuclear Instruments and Methods in Physics Research, Vol. A358, pg. 264 (1995).
High-Brightness RF Photocathode Guns for Single Pass X-Ray Free-Electron Lasers. P.G. O'Shea. Nuclear Instruments and Methods in Physics Research, Vol. A358, pg. 36 (1995).
Facilities and Opportunities for X-ray Crystallography at the Duke University Free-Electron Laser Laboratory. V.N. Litvinenko, P.G. O’Shea, J.M.J. Madey and K.D. Straub. International Union of Crystallography Newsletter (1995).
Novel Concepts for High-Power Electrostatic Accelerator Free-Electron Lasers. Gover and Y. Pinhasi, P. G. O’Shea, V. L. Granatstein. Laser Power Beaming II, H. E. Bennett, editor, Proceedings of SPIE, Vol. 2376, pg. 73 (1995).
High-Average Current Photocathode Guns. P.G. O'Shea. Laser Power Beaming II, H. E. Bennett, editor, Proceedings of SPIE, Vol. 2376, pg. 142 (1995).
An FEL Design Code Running on MATHCAD. D.C. Nguyen, S.M. Gierman, P.G. O’Shea. Nuclear Instruments and Methods in Physics Research, Vol. A358, pg. ABS 67 (1995)
1994
· Demonstration of Ultraviolet Lasing with a low Energy Electron Beam. P.G. O’Shea et al. Nuclear Instruments and Methods in Physics Research, Vol. A341, pg. 7 (1994).
1993
· Electron-Beam Diagnostic Development for the Los Alamos FEL Facility. M.D. Wilke, A.H. Lumpkin, P.G. O'Shea, E.J. Pitcher, R.B. Feldman. 1992 LINAC Proceedings, AECL-10728, pg. 817 (1993).
· Operation of the APEX Photoinjector Accelerator at 40 MeV. D.W. Feldman, P.G. O'Shea et al. 1992 LINAC Conference Proceedings, AECL-10728, pg. 603 (1993).
· Performance of the APEX 40-MeV Photoinjector-Driven Linear Accelerator: Generation and Transport of High-Brightness Electron Beams. P.G. O'Shea et al. Advanced Accelerator Concepts, AIP Conference Proceedings No. 279, pg. 743 (1993).
· Report on the High-Brightness-Source Working Group. P.G. O'Shea and M. Reiser. Advanced Accelerator Concepts, AIP Conference Proceedings No. 279, pg. 579 (1993).
· Lasing Attempt with a Microwiggler on the Los Alamos FEL. R.W. Warren, P.G. O'Shea; S.C. Bender, B.E. Carlsten, J.W. Early, D.W. Feldman, C.M. Fortgang, J.C. Goldstein, M.J. Schmitt, W.E. Stein, M.D. Wilke, T.J Zaugg., B.E. Newnam and R.L Sheffield. Nuclear Instruments and Methods in Physics Research, Vol. A331, pg. 48 (1993).
· Performance of the APEX Free-Electron Laser at Los Alamos National Laboratory. P.G. O'Shea; S.C. Bender, B.E. Carlsten, J.W. Early, D.W. Feldman, A.H. Lumpkin, R.B. Feldman, J.C. Goldstein, K.F. McKenna, R. Martineau, E.J. Pitcher, M.J. Schmitt, W.E. Stein, M.D. Wilke, T.J Zaugg. Nuclear Instruments and Methods in Physics Research, Vol. A331, pg. 62 (1993).
· Measuring Emittance of Non-Thermalized Electron Beams from Photoinjectors. B.E. Carlsten, J.C. Goldstein, P.G. O'Shea, and E.J. Pitcher. Nuclear Instruments and Methods in Physics Research, Vol. A331, pg. 791 (1993).
· Experiments in Sideband-Suppression on the Los Alamos National Laboratory Free-Electron Laser. C.J. White, M.R. Coyle, A.H. Paxton, P.G. O'Shea, S.C. Bender, D.A. Byrd, D.W. Feldman, J.C. Goldstein, E.J. Pitcher, T.J. Zaugg. Proceedings of SPIE, Vol. 1868, pg. 286 (1993).
· Operational Experience with a Free-Electron Laser Driven by an RF Photoinjector LINAC. P.G. O'Shea, D.W. Feldman, R.W. Warren. Electron-Beam sources of High-Brightness Radiation, H. Freund, editor, Proceedings of SPIE, Vol. 2013, pg. 138 (1993).
· Ultraviolet Free-Electron Laser driven by a High-Brightness 45-MeV Electron Beam. P.G. O'Shea., S.C. Bender, D.A. Byrd, J.W. Early, D.W. Feldman, C.M. Fortgang, J.C. Goldstein, B.E. Newnam, R.L. Sheffield,. R.W. Warren, T.J. Zaugg. Physical Review Letters, Vol.71, pg. 3661 (1993).
1992
· Initial Lasing Results from the Los Alamos Photoinjector-Driven Free-Electron Laser. P.G. O'Shea, S.C. Bender, D.A. Byrd, B.E. Carlsten, J.W. Early, D.W. Feldman, R.B. Feldman, W.J.D. Johnson, A.H. Lumpkin, M.J. Schmitt, R.W. Springer, W.E. Stein, T.J. Zaugg. Nuclear Instruments and Methods in Physics Research, Vol. A318, pg. 52 (1992).
· The Los Alamos POP Project: FEL Oscillator Experiments in the Ultraviolet and Beyond. B.E. Newnam, R.W. Warren, J.C. Goldstein, M.J. Schmitt, S.C. Bender, B.E. Carlsten, D.W. Feldman, P.G. O'Shea. Nuclear Instruments and Methods in Physics Research, Vol. A318, pg. 197 (1992).
· The Los Alamos High-Brightness Photoinjector. P.G. O'Shea. High-Brightness Beams for Advanced Accelerator Applications, American Institute of Physics (AIP) Conference Proceedings No. 253, pg. 182 (1992).
· Initial Electron-Beam Characterization for the Los Alamos APEX Facility. A.H. Lumpkin, R.B. Feldman, S.A. Apgar, D.W. Feldman, P.G. O'Shea, R.B. Fiorito, D.W. Rule. Nuclear Instruments and Methods in Physics Research, Vol. A318, pg. 415 (1992).
1991
· A Linear Accelerator in Space – The Beam Experiment Aboard Rocket. P.G. O'Shea, T.A. Butler, M.T. Lynch, K.F. McKenna, M. B. Pongratz, T.J. Zaugg. 1990 LINAC Conference Proceedings, LA-12004, pg. 739 (1991).
· Performance of the Los Alamos HIBAF Accelerator at 17 MeV. D.W, Feldman, S.C. Bender, B.E. Carlsten, J. Early, R.B. Feldman, W.J.D. Johnson, A.H. Lumpkin, P.G. O'Shea, W.E. Stein, R.L. Sheffield and K. McKenna. Nuclear Instruments and Methods in Physics Research, Vol. A304, pg. 224 (1991).
· INEX Simulations of Experimentally Measured Accelerator Performance at the Los Alamos HIBAF Facility. B.E Carlsten, L.M Young, M.J. Browman, H. Takeda, D.W, Feldman, P.G. O'Shea, A.H. Lumpkin. Nuclear Instruments and Methods in Physics Research, Vol. A304, pg. 587 (1991).
· BEAR (The Beam Experiment Aboard Rocket Project) Final Report. A. McGuire, G. Nunz, P. O'Shea, E. Barnett, Editors. Two-volume book published by Los Alamos National Laboratory (LA-11737-MS) (1991).
· Performance of the Photoinjector for the Los Alamos Free-Electron Laser P.G. O'Shea et al. Proceedings 1991 IEEE Particle Accelerator Conference, pg. 2754 (1991).
· Experimental Results from the Los Alamos FEL Photoinjector. D.W. Feldman, S.C. Bender, B.E. Carlsten, J. Early, R.B. Feldman, W.J.D. Johnson, A.H. Lumpkin, P.G. O'Shea, W.E. Stein, R.L. Sheffield, L.M. Young. IEEE Journal of Quantum Electronics, Vol. 27, pg. 2636 (1991).
· Design and Analysis of Experimental Performance of the Los Alamos HIBAF Facility Accelerator Using the INEX Computer Model. B.E. Carlsten, L.M. Young, M.E. Jones, L.E. Thode, A.H. Lumpkin, D.W. Feldman, R.B. Feldman, B. Blind, M.J. Browman, and P.G. O'Shea. IEEE Journal of Quantum Electronics, Vol. 27, pg. 2580 (1991).
· The Los Alamos Photoinjector-Driven Free-Electron Laser. P.G. O'Shea. Short Wavelength Radiation Sources, Phillip Sprangle Editor, Proceedings of SPIE, Vol. 1552, pg. 36 (1991).
· Experimental Study of a High-Brightness H- Beam and its Transport Through an ESQ Focusing System. S.K. Guharay, C.K. Allen, M. Reiser, P.G. O'Shea. Proceedings of SPIE, Vol. 1629, pg. 421 (1991).
1990
· Production of N+2 First Negative Emission by Impact of 1-MeV Ho, H+, H- on N2. R.F. Holland, D.D. Cobb. W. B. Meyer II, W.B. Clodius, P.G. O'Shea, R. Bos and B. Frogget. Physical Review A, Vol. 41, pg. 2429 (1990).
· The Los Alamos High-Brightness Accelerator Free Electron Laser Facility. D.W. Feldman, W.D. Cornelius, S.C. Bender, B.E. Carlsten, P.G. O'Shea, R.L. Sheffield. Free-Electron Lasers and Applications, Donald Prosnitz Editor, Proceedings of SPIE-The International Society for Optical Engineering, Vol. 1227, pg. 2 (1990).
1989
· A Flight qualified RFQ for the BEAR Project. D. Schrage, L. Young, B. Campbell, J.H. Billen, T. Wangler, J. Stovall, F. Martinez, W. Clark, G. Bolme, S. Gibbs, P.G. O'Shea, M. Lynch, J. Devenport, J. Rathke, R. Micich, J. Rose, R. Richter and G. Rosato. 1988 Linear Accelerator (LINAC) Conference Proceedings, CEBAF Report #89-001, pg. 54 (1989).
· Laboratory Performance of the BEAR RFQ. P.G. O'Shea, D.L. Schrage, L.M. Young, T.J. Zaugg, K.F. McKenna, L.D. Hansborough. Nuclear Instruments and Methods in Physics Research, Vol. B 40/41, pg. 946 (1989).
· BEAR RFQ-Beam Experiment Aboard Rocket. D. Schrage, L. Young, B. Campbell, J.H. Billen, J. Stovall, F. Martinez, W. Clark, G. Bolme, S. Gibbs, D. King, P.G. O'Shea, T.A. Butler, J. Rathke, R. Micich, J. Rose, R. Richter and G. Rosato. Nuclear Instruments and Methods in Physics Research, Vol. B 40/41, pg. 949 (1989).
· Compact Emittance Scanners for MeV Particle Beams. P.G. O'Shea, T.J. Zaugg, L.D. Hansborough. Proceedings of the 1989 IEEE Particle Accelerator Conference, pg. 1553 (1989).
· Variable Gradient Permanent Magnet Quadrupole Lenses. P.G. O'Shea, T.J. Zaugg, R.G. Maggs, P. Schafstall, J. Dyson. Proceedings of the 1989 IEEE Particle Accelerator Conference, pg. 354 (1989).
· The BEAR Accelerator. P.G. O'Shea, T. Butler, L.D. Hansborough, M.T. Lynch, K.F. McKenna, D.L. Schrage, M.R. Shubaly, J.E. Stovall, T.J. Zaugg. Proceedings of the 1989 IEEE Particle Accelerator Conference, pg. 1462 (1989).
1987
· Experimental Study of the Propagation of Intense Relativistic Beams in Non-Conducting Vacuum Drift Tubes after Passage through a Localized Plasma Source. W.W. Destler, P.G. O'Shea, J. Rodgers, Z. Segalov. Journal of Applied Physics, Vol. 61, pg. 2458 (1987).
· Collective Ion Acceleration via a Laser Controlled Ionization Channel. W.W. Destler, P.G. O'Shea, J. Rodgers, Z. Segalov. Proceedings of the IEEE Particle Accelerator Conference, Vol. 1, pg. 103 (1987).
· Intense Beam Propagation Properties in Magnetized and Localized Ion Source Configurations. W.W. Destler, R.J. Faehl, P.G. O'Shea, M. Reiser, Z. Segalov, C.D. Striffler and X. Zhang. Proceedings of Beams '86, pg. 215 (1987).
1986
Laser Controlled Collective Ion Accelerator. P.G. O'Shea, W.W. Destler, Z. Segalov. Applied Physics Letters, Vol. 49, pg. 1696 (1986).
1985
Collective Acceleration and the Propagation of Intense Beams into Vacuum. W.W. Destler, P.G. O’Shea, Z. Segalov. IEEE Transactions on Nuclear Science, Vol. NS-32, pg. 3481 (1985).
1984
Studies of the Helix Controlled Collective Ion Accelerator. W.W. Destler, P.G. O'Shea, M. Reiser, C.D. Striffler, D. Welsh, H.H. Fleichmann. IEEE Transactions on Nuclear Science, Vol. NS-30, pg. 3183 (1983).
Propagation in Vacuum of an Intense Electron Beam Injected through a Localized Plasma . W.W. Destler, P.G. O'Shea, M. Reiser. Physical Review Letters, Vol. 52, pg. 1978 (1984).
Intense Relativistic Electron Beam Propagation in Evacuated Drift Tubes, P.G. O'Shea, D. Welsh, W.W. Destler, C.D. Striffler. Journal of Applied Physics, Vol. 55, pg. 3934 (1984).
Propagation of an Intense Relativistic Electron Beam through a Plasma Region into Vacuum. W.W. Destler, P.G. O'Shea, M. Reiser. Physics of Fluids, Vol. 27, pg. 1897 (1984).