Journal Articles and Book Chapters

1) Yi Jing, I.V. Timoshkin, M.P. Wilson, S.J. Macgregor, Tao Wang, J.M. Lehr. “Dielectric Properties of Natural Ester, Synthetic Ester Midel 7131 and Mineral Oil Diala,” IEEE Transactions on Dielectrics and Electrical Insulation, 21(2):644-652, 2014.
2) Martin J. Given, Mark P. Wilson, Igor V. Timoshkin, Scott J. MacGregor, Tao Wang, Jane M. Lehr, “The Triggered Behaviour of a Controlled Corona Stabilised Cascade Switch,” IEEE Transactions on Plasma Science, Special Issue on Pulsed Power Science and Technology, October, 2012.
3) Mark P. Wilson, Igor V Timoshkin, Martin J Given, Scott J MacGregor, Tao Wang, Mark A Sinclair, Ken J Thomas, Jane M Lehr, “Breakdown of Mineral Oil: Effect of Electrode Geometry and Rate of Voltage Rise," IEEE Trans. on Dielectrics and Electrical Insulation, Vol. 19, Issue 5, pp. 1657-1664, October 2012.
4) Michael Hogg, Igor Timoshkin, Mark Wilson, Scott MacGregor, Tao Wang, R. Tony Fouracre , Jane Lehr, “Impulse Breakdown of Water with Different Conductivities,” IEEE Trans. on Dielectrics and Electrical Insulation, Vol. 19, Issue 5, pp. 1559-1568, October 2012.
5) J.M. Lehr, Z.R. Wallace, L.K. Warne and R.E. Jorgenson, “Emergence of the Positive Column in an Atmospheric Air Discharge,” IEEE Transactions on Plasma Science, Vol. 39, No. 11, pp 2274- 2275, November, 2011.
6) M.P. Wilson, IV Timoshkin, M.J. Given, S.J. MacGregor, M.A. Sinclair, K.J. Thomas, J.M. Lehr, “Effect of Applied Field and Rate of Voltage Rise on Surface Breakdown of Oil-Immersed Polymers,” IEEE Trans. on Dielectrics and Electrical Insulation, Vol. 18, Issue 4, pp. 1003-1010, August, 2011.
7) Martin J., Igor V Tmoshkin, Mark P Wilson, Scott J MacGregor, Jane M Lehr, “A Novel Design for a Multistage Corona Stabilised Closing Switch,” IEEE Trans. on Dielectrics and Electrical Insulation, Vol. 18, Issue 4, pp. 983-989, August 2011. DOI: 10.1109/TDEI.2011.5976085.
8) Mark P. Wilson, Igor V. Timoshkin, Martin J Given, Scott J MacGregor, Mark Sinclair, Ken Thomas, Jane Lehr, “Effect of Applied Field and Rate of Voltage Rise on Surface Breakdown of Oil-Immersed Polymers,” IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 18, Issue 4, pp. 1003-1010, August 2011
9) S.F. Glover, L.X. Schneider, K.W. Reed, G.E. Pena, J. Davis, C.A. Hall, R.J. Hickman, K.C. Hodge, J.M. Lehr, D.J. Lucero, D.H. McDaniel, J.G. Puissant, J.M. Rudys, S.J. Tullar, D.M. Van De Valde, and F.E. White, “Genesis: A 5-MA Programmable Pulsed-Power Driver for Isentropic Compression Experiments,” IEEE Transactions on Plasma Science, Special Issue on Pulsed Power Science and Technology, Vol. 38, Issue 10, pp. 2620 – 2626, October, 2010.
10) Mark P. Wilson, Martin J. Given, Igor V. Timoshkin, Scott J. MacGregor, Mark A. Sinclair, Ken J. Thomas, and Jane M. Lehr, “Impulse Breakdown Characteristics of Polymers Immersed in Insulating Oil,” IEEE Transactions on Plasma Science, Vol. 38, Iss. 10, pp. 2611-2619, October 2010.
11) Mark P. Wilson, Scott J. MacGregor, Martin J. Given, Igor V. Timoshkin, , Mark A. Sinclair, Ken J. Thomas, and Jane M. Lehr, “Surface Flashover of Oil-Immersed Dielectric Materials in Uniform and Non-Uniform Fields,” Transactions on Dielectrics and Electrical Insulation, Vol. 16, Issue 4, pp. 1028-1036, August, 2009.
12) J.R. Beveridege, S.J. MacGregor, M.J. Given, I.V. Timoshkin and J.M. Lehr, “A Corona-Stabilised Plasma Closing Switch,” IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 16, Issue No. 4, pp 948-955, August 2009.
13) M.P. Wilson, S.J. MacGregor, I.V. Timoshkin, M.J. Given, M.A. Sinclair, K.J. Thomas and J.M. Lehr, “Impulse Breakdown Characteristics of Dielectric Materials Immersed in Insulating Oil,” submitted to the IEEE Transactions on Dielectrics and Electrical Insulation, 2008
14) J.R. Woodworth, E. Barnat, B. Aragon,J. Corley, K. Hodge, J. Blickem, V Anaya, D. Guthrie, D. Bliss, J. Lehr, J.E. Maenchen, P. Wakeland, S. Drennan, D.L. Johnson. “Time History and Spectra of the Light Emitted by Multimegavolt Water Switches,” IEEE Transactions on Plasma Science, 35, 1797, 2007.
15) N. Zameroski, J.M. Lehr, J.W. Woodworth, J.E. Maenchen, “Multimegavolt Laser Triggered Gas Switches with a Green Laser and Beam Transport through Water,” IEEE Transactions on Plasma Science, 35, 696, IEEE Trans. Plas. Sci, 2007.
16) B.V. Oliver, J.M. Lehr and M.E. Savage, Guest Editorial for the IEEE Transactions on Plasma Science, Special Issue on Pulsed Power Science and Technology, October 2006.
17) J. Qian, R.P. Joshi, E. Schamilaglu, J. Gaudet, J.M. Lehr and J.R. Woodworth, “Analysis of the Polarity Effect s in the Electrical Breakdown of Liquids,” J. Phys.D: Appl.Phys. 39 (2006) 359-369.
18) C.E. Baum, W.L. Baker, W.D. Prather, J.M. Lehr, J.P. O’Loughlin, D.V. Giri, I.D. Smith, R. Altes, J. Fockler, D. McLemore, M.D. Abdalla and M.C. Skipper, “JOLT: A Highly Directive, Very Intensive, Impulse-like Radiator,” Proceedings of the IEEE, Vol 92, No. 7, July 2004.
19) J.R. Woodworth, J.M. Lehr, J. Elizondo-Decanini, P.A. Miller, P. Wakeland, M. Kincy, J. Garde, B. Aragon, W. Fowler, G. Mowrer, J.E. Maenchen, G.S. Sarkisov, J. Corley, K. Hodge, S. Drennan, D. Guthrie, M. Navarro, D.L. Johnson, H.C. Ives, M.J. Slattery and D.A. Muirhead, “Optical and Pressure Diagnostics of a 4MV Water Switches in the Z20 Test Facility,” IEEE Transactions on Plasma Science, Vol 32, No. 5, pp. 1778-1789, October 2004.
20) W.D. Prather, C.E. Baum, J.M.Lehr, J.A. Gaudet, J.W. Burger, R.J. Torres, D.I. Lawry and T.C. Tran, “Recent Developments in Ultra-Wideband Sources and Antennas,” Ultra-Wideband, Short-Pulse Electromagnetics 6, E. Mokole, K. Gerlach and M. Kragalott (eds.), Plenum Press, New York, 2004.
21) C.E. Baum and J.M. Lehr, “Tapered Transmission-line Transformers for Fast High Voltage Transients,” IEEE Transactions on Plasma Science, Vol. 30, No. 5, PP 1712-1721, Oct. 2002.
22) J. Mankowski, M. Kristiansen, J.M. Lehr, W.D. Prather, and John Gaudet, “Subnanosecond Corona Inception in an Ultra-Wideband Environment,” IEEE Trans.Plas.Sci., Vol 30, no.3, 1211-1214, June 2002.
23) J.M. Lehr, C.E. Baum “Parallel Charging of Marx Generators for High Pulse Repetition Rate Operation.” Ultra-Wideband, Short-Pulse Electromagnetics 5, P.D. Smith, S.R. Cloude (eds.), Plenum Press, New York, pp. 415-422, 2002.
24) W.D. Prather, C.E. Baum, J.M. Lehr, M. Walker, J. Burger, R. Torres, T. Tran, and J. Gaudet, "Recent Developments in Ultra-Wideband Sources and Antennas," Ultra-Wideband, Short-Pulse Electromagnetics 5, D. Parkes, P. Smith (eds.), Plenum Press, New York, pp. 393-398, 2002.
25) J.M. Lehr, “Recent Progress in Ferratron Measurements,” with E.G. Farr, J.M. Elizondo and D. Ellibee, Proceedings of the SPIE, Intense Mircrowave Pulses VIII, Vol. 4371, pp88-98, 2001.
26) W.D. Prather, C.E. Baum, J.M. Lehr, M.J. Walker, R.J. Torres, T.C. Tran, J.A. Gaudet, and J.W. Burger, “Research & Development in Ultra-Wideband Sources and Antennas,” Int’l Conference on Electromagnetics in Advanced Applications (ICEAA 2001), September 2001 (Invited).
27) W.D. Prather, C.E. Baum, J. M. Lehr, J. P. O’Loughlin, S. Tyo, J. S. H. Schoenberg, R. J. Torres, T. C. Tran, D. W. Scholfield, J. Gaudet, and J. W. Burger, “Ultra-Wideband Source Research,” IEEE Transactions on Plasma Science, Special Issue on Pulsed Power Science & Technology, 28 (5), October 2000.
28) J.M. Lehr, M.D. Abdalla, F. Gruner, B.C. Cockreham, M.G. Skipper and W.D. Prather, “A Hermetically Sealed Trigatron for High Pulse for High Pulse Repetition Rate Operation,” IEEE Trans. on Plasma Science, Special Issue on Pulsed Power, 28(5), October, 2000.
29) D.V. Giri, J.M. Lehr, W.D. Prather, CE Baum, and RJ Torres, “Intermediate and Far Fields of a Reflector Antenna Energized by a Hydrogen Spark Gap Switched Pulser,” IEEE Trans. on Plasma Science, Special Issue on Pulsed Power, 28(5), pp. 1631-1636, October, 2000.
30) J.M. Lehr, S.M. Ahern, M.D. Abdalla, J.G. Buchanauer, F. Gruner, B.C. Cockreham, M.C. Skipper, S.P. Romero, J.A. Gaudet, J.P. Hull and W.D. Prather, “Marx Generator Triggering with Photoconductive Switches,” in Intense Microwave Pulses VII, H.E. Brandt, Editor, Proceedings of the SPIE, Vol. 4031(2000), pp. 175-184.
31) J.M. Lehr, C.E. Baum, L.H. Bowen, E.G. Farr, D.E. Ellibee, J.M. Elizondo and W.D. Prather, “Progress in the Development of the Ferratron: A Novel, Repetitively Rated Triggered Switch with Ultra Low Jitter,” in Intense Microwave Pulses VII, H.E. Brandt, Editor, Proceedings of the SPIE, Vol. 4031(2000), pp. 154-162.
32) J.M. Lehr, C.E. Baum, W.D. Prather and R.J. Torres, “Fundamental Physical Considerations for Ultrafast Spark Gap Switching,” in Ultra-Wideband/Short Pulse Electromagnetics 4, E. Heyman, B. Mandelbaum and J. Shiloh, Eds, Plenum Press, New York, 1999.
33) W.D. Prather, J.M. Lehr, et.al., “UltraWideband Sources and Antennas,” with W.D. Prather, et al., in Ultra-Wideband/Short Pulse Electromagnetics 4, E. Heyman, B. Mandelbaum and J. Shiloh, Eds, Plenum Press, New York, 1999.
34) J.M. Lehr and E.E. Kunhardt, “Simulation of Electron Transport in Liquids under High Electric Fields,” Proceedings of the SPIE, April, 1999.
35) J.M. Lehr, W.D. Prather, F.J. Agee, R. Copeland, "Measurement of the Electric Breakdown Strength of Transformer Oil in the Sub-nanosecond Regime," IEEE Trans on Dielectrics and Electrical Insulation, Vol. 5, No. 6, December 1998.
36) F.J. Agee, C. E. Baum, J. M. Lehr, W. D. Prather, J. P. O’Loughlin, J. W. Burger, J. S. H. Schoenberg, D. W. Scholfield, R. J. Torres, J. P. Hull and J. Gaudet, “Ultrawideband Transmitter Research,” IEEE Trans. Plas. Sci., Vol. 26, No. 3, pp. 860-873, June 1998.
37) C. Courtney, T. S. Bowen, K, Burr, J. Lehr, “Wideband Time Domain Measurement of Material Permittivity and Permeability,” in Ultra-Wideband/Short Pulse Electromagnetics 3, C.E Baum, L. Carin and A.P. Stone, Eds. Plenum Press, New York, pp. 231-238, 1997.
38) F.J. Agee, J.M. Lehr, W.D. Prather, and D.W. Scholfield, “Ultra-wideband Switching: Gas and Oil Breakdown Research,” Proceedings of the SPIE, July 1997.
39) F.M. Lehr, J.H. Degnan, D. Dietz, S.E. Englert, T.J. Englert, J.D. Graham, J. J. Havranek, T.W. Hussey, J.M. Lehr, C.A. Outten, R.E. Peterkin, Jr., N. F. Roderick, U. Shumlak, P.J. Turchi, “The Formation of a High Density Working Fluid for Solid Liner Implosions,” accepved for publication, IEEE Trans. on Plas. Sci.

Patents

1) J.M. Lehr “Air Core Transformer with Coaxial Grading Shield,” US Patent Number 6414581 with J.P. O’Loughlin, D.L. Loree and G.J. Rohwein; (2002).

Boeing Reports

1) J.M. Lehr, K.C. Hodge, M.D. Abdalla, M.C. Skipper, S. Romero, F. Gruner, B. Cockreham, “Cryogenic Liquid Spark Gap Switches,” SAND2007-7682.
2) J.M. Lehr, et.al, “Fundamental Science Investigations to Develop a 6 MV Laser Triggered Gas Switch for ZR: First Annual Report,” SAND2007-0217.
3) L.K. Warne, R.E. Jorgenson and J.M. Lehr, “Resistance of a Water Spark,” SAND2005-6994.
4) L.K. Warne, L.I. Basilio, W.A. Johnson, M.E. Morris, M.B. Higgins and J.M. Lehr, “Capacitance and Effective Area of Flush Monopole Probes,” SAND-2004-3994.

Air Force Research Laboratory Note Series

1) V. Carboni, H. Lackner, D.V. Giri, and J.M. Lehr, “The Breakdown Fields and Risetimes of Select Gases Under Conditions of Fast Charging (~20 ns and less) and High Pressures (20-100 Atmospheres),” Switching Note 32, May 2002.
2) C.E. Baum and J.M. Lehr, “Some Considerations for Multichannel Switching,” Switching Note 31, January 2002.
3) E.G. Farr, D.E. Ellibee, J.M. Elizondo, C.E. Baum and J.M. Lehr, “A Test Chamber for a Gas Switch Using a Hyperboloidal Lens,” Switching Note 30, March, 2000.
4) C.E. Baum and J.M. Lehr, “Nonuniform Transmission Line Transformers for Fast High Voltage Transients,” Circuit and Electromagnetic System Design Note 44, February 2000.
5) C.E. Baum and J.M. Lehr, “Charging of Marx Generators,” Circuit and Electromagnetic System Design Note 43, September, 1999.
6) L.H. Bowen, E.G. Farr, J.M. Elizondo and J.M. Lehr, “The Ferratron: A High Voltage, High Rep Rate, Low Jitter UWB Switch with a Ferroelectric Trigger,” Switching Note 29, March, 1999.
7) J.M. Lehr, C.E. Baum, and W.D. Prather, “Fundamental Physical Considerations for Ultrafast Spark Gap Switching,” Switching Note 28, June 1997.

Conference and Workshop Publications

1) M.P. Wilson, IV Timoshkin, M.J. Given, S.J. MacGregor, M.A. Sinclair, K.J. Thomas, J.M. Lehr, “Effect of electrode geometry and rate of voltage rise on streamer propagation in mineral oil,” Int. Conference on Dielectric Liquids, pp. 1-4, June, 2011.
2) J.M. Lehr, J.R. Beveridge, K.C. Hodge, I.V. Timoskin, M.J. Given, S.F. Glover, S.J. MacGregor, L.X. Schneider, G. Pena, “Evaluation of spark gaps switches operated at low percents of self break voltage,” presented at the Int. Pulsed Power Conference, June, 2009.
3) J.M. Lehr, L.K. Warne, R.E. Jorgenson, Z.R. Wallace, K.C. Hodge and M. Caldwell. “Streamer Initiation in Volume and Surface Discharges in Atmospheric Gases,“ Proc of the IEEE Int. Power Modulator Conference, 2008.
4) M.P. Wilson, M.J. Given, S.J. MacGregor, I.V. Timoskin, J.R. Beveridge, K.J. Thomas, M.A. Sinclair and J.M. Lehr, “Breakdown Initiation Fields for Surface Flashover of Dielectric Materials Immersed in Transformer Oil,” Proceedings of the 28th IEEE Power Modulator Symposium, pp. 41-44, 2008.
5) J.R. Beveridge, S.J. MacGregor, I.V. Timoskin, and J.M. Lehr, “A Corona Stabilized Plasma Closing Switch,” Proceedings of the 28th IEEE Power Modulator Symposium, pp. 487-490, 2008.
6) I.V. Timoskin, S.J. MacGregor, M.J. Given, J.R. Beveridge and J.M. Lehr, “Dynamic Characteristics of Corona Discharges in Point-Plane Electrode Topologies Influenced by Space Charge,” Proceedings of the 28th IEEE Power Modulator Symposium, pp. 495-498, 2008.
7) M.P. Wilson, R.A. Fouracre, M.J. Given, S.J. MacGregor, I.V. Timoshkin, K.J. Thomas, M.A. Sinclair, J.M. Lehr, “Surface Flashover of Dielectric Materials Used in Pulsed Power Research,” Proc. of the IEEE Int. Pulsed Power Conference, 2007.
8) M.E. Savage, L.F. Bennett, D.E. Bliss, W.T. Clark, R.S. Coats, J.M. Elizondo, K.R. LeChien, C. Harjes, J.M. Lehr, J.E. Maenchen, D.H. McDaniel, M.F. Pasik, T.D. Pointon, A.C. Owen, D.B. Seidel, D.L. Smith, B.S. Stoltzfus, K.W. Struve, L.K. Warne, J.R. Woodworth, C.W. Mendel, K.R. Prestwich, B. Shoup, D.L. Johnson, J.P. Corley, K.C. Hodge, T.C. Wagoner, P.E. Wakeland, ”An Overview of Pulse Compression and Power Flow in the Upgraded Z Pulsed Power Driver,” Proc. of the IEEE Int. Pulsed Power Conference, 2007.
9) M.J. Given, I.V. Timoshkin, M.P. Wilson, S.J. MacGregor, J.M. Lehr, ”Analysis of the Current Waveforms Observed in Underwater Spark Discharges,“ Proc. of the IEEE Int. Pulsed Power Conference, 2007.
10) S.J. MacGregor, I.V. Timoshkin, M.J. Given, R.A. Fouracre, J.M. Lehr, L.K. Warne, ”Factors Affecting the Operation of Multi-Electrode Spark Gaps,“ Proc. of the IEEE Int. Pulsed Power Conference, 2007.
11) J.R. Woodworth, D.E. Bliss, M.E. Savage, K.R. LeChien, J.E. Maenchen, J.M. Lehr, J.P. Corley, K.C. Hodge, D. Guthrie, Z. Wallace, V. Anaya, G. Feltz, P. Wakeland, T. Thompson, J.R. Blickem, M.J. Hardin, ”Optical Diagnostics of the Zr Gas Switch,” Proc. of the IEEE Int. Pulsed Power Conference, 2007.
12) K.R. LeChien, D.E. Bliss, J.M. Lehr, J.E. Maenchen, D.H. McDaniel, M.E. Savage, K.W. Struve, J.R. Woodworth, J.P. Corley, K.C. Hodge, P.E. Wakeland, K.R. Prestwich, “Zr Laser Triggered Gas Switch Requirements and Performance,” Proc. of the IEEE Int. Pulsed Power Conference, 2007.
13) S.F. Glover, J.A. Alexander, K.W. Reed, G.E. Pena, M.L. Horry, J.M. Usher, J.M. Lehr, “Laser Triggering of Spark Gap Switches with Less than 100uJ's of Energy,” Proc. of the IEEE Int. Pulsed Power Conference, 2007.
14) J. Maenchen, D. Bliss, J.Corley, K.Hodge, D. Johnson, S. Kovaleski, K. Lechien, J. Lehr, S. MacGregor, D. McDaniel, R. McKee, R. Miller, A. Neuber, K. Prestwich, M. Savage, K. Struve, J. Van den Avle, P. Wakeland, L. Warne and J. Woodworth, “Pulsed Power Technology Development for ZR,” Proceedings of 16th International Conference on High-Power Particle Beams, Oxford, UK, 2006.
15) J. Maenchen, D. Bliss, K. Le Chien, J. Lehr, D. McDaniel, R. McKee, R. Miller, M. Savage, K. Struve, , J. Van den Avle, P. Wakeland, L. Warne, J. Woodworth, S. MacGregor, A. Neuber, S. Kovaleski, and K. Prestwich, “Progress in Laser Triggered Gas Switches,” Proceedings of the First European-Asian Pulsed Power Conference, ChengDu, China, 2006.
16) J.M. Lehr, L.K. Warne and R. Jorgenson, “High Power Water Switching,” International Conference on Plasma Science, 2006.
17) D.E. Bliss, D.D. Bloomquist, H.C. Harjes, J.M. Lehr, F.W. Long, J.E. Maenchen, D.H. McDaniel, G.R. McKee, M.E. Savage, D.L. Smith, K.W. Struve, J.W. Weed, E.A. Weinbrecht, J.R. Woodworth, D.L. Johnson, J.P. Corley, “The ZR Final Design Pulsed Power Performance Expectations,” Proc. of the IEEE Power Modulator Conference, pp 582, 2006.
18) N. Zameroski, J. Lehr, JR. Woodworth, J.E. Maenchen, J. Blickem, Z. Wallace, V. Anaya, J.P. Corley, J. Lott, K. Hodge, “Laser Triggering of Gas Switches Utilizing Beam Transport through Pure Water,” Proceedings of the 15th Int. Pulsed Power Conference, J.E. Maenchen and E. Shamilaglu, Ed., 2005.
19) E. Dawson, Jr., T.L. Downey, J.M. Lehr, K. Hodge, J.E. Maenchen, J.P. Corley, S.A. Drennan, D.W. Guthrie, Z. Wallace and V. Anaya, “Toward the Autonomous Operation of Z20: A TW Pulsed Power Module,” to be published in the Proceedings of the 15th Int. Pulsed Power Conference, J.E. Maenchen and E. Shamilaglu, Ed., 2005.
20) J. Douglas, J. Banister, P. Corcoran, J.Goyer, R. Miller, D. Morton, H. Nishimoto, I. Smith, J. Corley, S. Drennan, D.Guthrie, K. Hodge, J.M. Lehr, J.E. Maenchen and D.L. Smith, “Performance of Self Closing Diverter Switches for ZR/Z20 Marx and Intermediate Store Protection,” to be published in the Proceedings of the 15th Int. Pulsed Power Conference, J.E. Maenchen and E. Shamilaglu, Ed., 2005.
21) J.M. Elizondo, H.C. Ives, K. Dullea, T.F. Chavez, M.F. Pasik, K.W. Struve, J.M. Lehr, D.L. Johnson, “Design and Circuit Parameters of the ZR Power Flow Verticle to Horizontal Water Convolute,” to be published in the Proceedings of the 15th Int. Pulsed Power Conference, J.E. Maenchen and E. Shamilaglu, Ed., 2005.
22) J.R. Woodworth, S.E. Rosenthal, J.M. Lehr, J.E. Maenchen, J. Elizondo, D.L. Johnson, J.P. Corley, K.C. Hodge, S.A. Drennan, D.W. Guthrie, “A 5 Megavolt 600 Kiloampere Laser Triggered Gas Switch for Use on ZR: Comparison of Experiments and Simulations,” to be published in the Proceedings of the 15th Int. Pulsed Power Conference, J.E. Maenchen and E. Shamilaglu, Ed., 2005.
23) J.M. Lehr, J.P. Corley, J.E. Maenchen and J.R. Woodworth, “Prepulse in High Power Water Switches,” Proceedings of the 15th Int. Pulsed Power Conference, J.E. Maenchen and E. Shamilaglu, Ed., 2005.
24) G. Boezer, J. Lehr and I. Kohlberg, “Technology Security in High Peak Pulsed Power,” to be published in the Proceedings of the 15th Int. Pulsed Power Conference, J.E. Maenchen and E. Shamilaglu, Ed., 2005.
25) M.F. Pasik, R.S. Coats, W.A. Johnson, J.M. Elizondo, T.D. Pointon, C.D. Turner, W.J. Bohnhoff, J.M. Lehr, M.E. Savage, “Transient Electromagnetic Modeling of the ZR Accelerator Water Convolute and Stack,” to be published in the Proceedings of the 15th Int. Pulsed Power Conference, J.E. Maenchen and E. Shamilaglu, Ed., 2005.

Invitational Events

1)J.M. Lehr, “High Power Water Switching at Sandia National Laboratories,” IEEE Albuquerque Joint Chapter, January, 2005.
2) J.M. Lehr, D.D. Bloomquist, J.P. Corley, S.A. Drennan, D.W. Guthrie H.C. Harjes, K.C. Hodge, D.L. Johnson, J.E. Maenchen, D.H. McDaniel and K.W. Struve, “SATPro: The System Assessment Test Program for ZR,” Conference Record of the Power Modulator Symposium and High Voltage Workshop, pp 106-110, 2004.
3) J.M. Lehr, J.P. Corley, D.L. Johnson, D.W. Guthrie, K.C. Hodge, J.E. Maenchen and J.R. Woodworth, “Prepulse in High Power Water Switches,” International Conference on Plasma Science, Baltimore, MD, 2004.
4) J. M. Elizondo, K.R. Prestwich, J.P. Corley, D.L. Johnson, P. Corcoran, J.R. Woodworth, J.M. Lehr, K. Struve, “Modeling of High Current Water Discharges for High Energy Transfer Pulsed Power Systems to Determine Steady State Conduction Resistance,” International Conference on Plasma Science, Baltimore, MD, 2004.
5) L. Bacon, J.M. Lehr, L.L. Molina and R.A. Salazar, “Measurement of the dielectric properties of dispersive materials over a wide frequency range,” Conference on Electrical Insulation and Dielectric Phenomena, pp 526-529, 2003.
6) J.W. Woodworth, J.M. Lehr, P.A. Miller, B. Aragon, J.P. Corley, J.E. Elizondo, D.L. Johnson, J.E. Maenchen, W. Fowler, K.C. Hodge, S.A. Drennan, D.W. Guthrie, G. Mowrer and M. Navarro, “Optical Diagnostics of a 4 MV Water Switches in the Z-20 Facility,” Proc. 14th Int. Pulsed Power Conference, M. Geisselman and A. Neuber Eds., p. 167, 2003.
7) F.J. Zutavern, J.C. Armijo, S.M. Cameron, G.J. Denison, J.M. Lehr, T.S. Luk, A. Mar, M.W. O’Malley, L.D. Roose and J.V. Rudd, “Optically Activated Switches for Low Jitter Pulsed Power Applications,” Proc. 14th Int. Pulsed Power Conference, M. Geisselman and A. Neuber Eds., p. 591, 2003.
8) J.M. Lehr, J.E. Maenchen, J.R. Woodworth, W.A. Johnson, R.S. Coates, L.K. Warne, L.P. Mix, J.P. Corley, D.L. Johnson, I.D. Smith, K.C. Hodge, S.A. Drennan, D.W. Guthrie, G.A. Sarkisov and M. Navarro, “Multi-Megavolt Water Breakdown Experiments,” Proc. 14th Int. Pulsed Power Conference, M. Geisselman and A. Neuber Eds., pp. 609-614, 2003.
9) S.E. Rosenthal, T.D. Pointon, J.M. Elizondo, W.A. Johnson, J.M. Lehr, J.E. Maenchen, K.W. Struve, D.H. McDaniel, J.P. Corley and D.L. Johnson, “Investigating the Electromagnetic Structure of the Coax-to-Triplate Transition for the Pulse Compression Section of the ZR Accelerator,” Proc. 14th Int. Pulsed Power Conference, M. Geisselman and A. Neuber Eds., pp. 626-629, 2003.
10) W.A. Johnson , R.S. Coates, R.E. Jorgensen, J.D. Kotulski, J.M. Lehr, M.F. Pasik, S.E. Rosenthal, C.D. Turner and L.K. Warne, ”Electromagnetic Analysis and Modeling of the Coax-to-Triplate Transition for the Pulse-Compression Section of the ZR Accelerator,” Proc. 14th Int. Pulsed Power Conference, M. Geisselman and A. Neuber Eds., pp. 630-633, 2003.
11) J.P. Corley, K.C. Hodge, S.A. Drennan, D.W. Guthrie, J.M. Lehr, J.M. Elizondo and S.E. Rosenthal, “Development/Tests of 6 MV Triggered Gas Switches at SNL,” Proc. 14th Int. Pulsed Power Conference, M. Geisselman and A. Neuber Eds., pp. 875, 2003.
12) J.M. Lehr, J.P. Corley, J.E. Elizondo, P. Corcoran, D.L. Johnson, J.E. Maenchen, M. Mazarakis, D.H. McDaniel, I.D. Smith, M. Kincy, D.L. Kitterman, P. Wakeland and K.W. Struve, “Multi-Megavolt Switching in Water: Considerations for the ZR Machine,” Conference on Electrical Insulation and Dielectric Phenomena, pp 554-557, 2002.
13) J.P. O’Loughlin, J.M. Lehr and D.L. Loree, “Energy Trapping and Adaptive Clocking Innovations Applied to Capacitor Charging Series Resonant Inverters,” Conference Record of the Power Modulator Symposium and High Voltage Workshop, pp 134-137, 2002.
14) J.P. O’Loughlin, J.M. Lehr and D.L. Loree, “High Repetition Rate Charging a Marx-type Generator,” Proc. 13th Int. Pulsed Power Conference, R. Reinovsky and M. Newton Eds., pp 242-245, 2001.
15) V. Carboni, H. Lackner, D. Giri and JM. Lehr, “The Breakdown Fields and Risetimes of Select Gases Under the Conditions of Fast Charging (~20 ns and less) and High Pressures (20-100 atmospheres),” Proc. 13th Int. Pulsed Power Conference, R. Reinovsky and M. Newton Eds., pp 1482-486, 2001.
16) E.G. Farr, J.M. Elizondo, J.M. Lehr and D. Ellibee, “Recent Measurements on the Ferratron: A High Voltage, Fast Risetime Gas Switch with a Ferroelectric Trigger,” Proc. 13th International Pulsed Power Conference, R. Reinovsky and M. Newton Eds., pp 1770-1773, 2001.
17) J.M. Lehr and M. Kristiansen, “Gas and Vacuum Switches-A Review,” Invited Paper, 27th IEEE International Conference on Plasma Science, June 2000.
18) EG Farr, J.M. Elizondo, J.M. Lehr and CE Baum, “A Test Chamber for a Ferrite Triggered Gas Switch,” presented at High Power Electromagnetics Session, EURO EM, May, 2000.
19) J.M. Lehr, C.E. Baum, E.G. Farr, D.E. Ellibee, J.M. Elizondo, “A Test Chamber for a Gas Switch Using a Hyperboidal Lens,” Switching Note 30, March 2000.
20) C.E. Baum and J.M. Lehr, “Charging of Marx Generators,” Circuit and Electromagnetic System Design Note 43, October, 1999.
21) J.M. Lehr, L.H. Bowen, J.M. Elizondo and E.G. Farr, “The Ferratron: A Novel, Repetitively Rated, Triggered Spark Gap Switch with Ultra Low Jitter,” Proceeding of the Conference on Electrical Insulation and Dielectric Phenomena, 1999.
22) J.M. Lehr, W.D. Prather, M.D. Abdalla, M.C. Skipper, K.P. Prestwich, “Development of a Hermetically Sealed Trigatron Switch for High Repetition Rate Primary Applications,” Proc. 12th International Pulsed Power Conference, C. Stallings and H. Kirbie, Eds., pp 146-149, 1999.
23) W.D. Prather, C.E. Baum, J.M. Lehr, J.P. O’Loughlin, S. Tyo, J.S.H. Schoenburg, R.J. Torres, T.C. Tran, D.W. Scholfield, J.W. Burger, J. Gaudet, ”Ultra-wideband Source Research,” Proceeding of the 12th Int. Pulsed Power Conference, C. Stallings and H. Kirbie, Eds, pp.185-189, 1999.
24) D.V. Giri, C.E. Baum, J.M. Lehr, W.D. Prather, ”Intermediate and Far Fields of a Reflector Antenna Energized by a Hydrogen Spark Gap Switched Pulsar,” Proc. 12th International Pulsed Power Conference, C. Stallings and H. Kirbie, Eds, pp 190-193, 1999.
25) J.M. Lehr, M.D. Abdalla, J.W. Burger, D.V. Giri, J. Hull, W.D. Prather, M.C. Skipper, “Evaluation of Resistors for Transient High Voltage Applications,” Proc. 12th International Pulsed Power Conference, C. Stallings and H. Kirbie, Eds pp. 666-669, 1999.
26) L.H. Bowen, J.M. Elizondo, E.G. Farr, J.M. Lehr, “High Voltage, High Rep-Rate, Low Jitter UWB Switch with Ferroelectric Trigger,” Proc. 12th Int. Pulsed Power Conference, C. Stallings and H. Kirbie, Eds, pp. 1137-1140, 1999.
27) T.W. Hussey, J.M. Lehr, K.J. Davis, N.F. Roderick, E.E. Kunhardt, and R.C. Pate, “Dynamics of Nanosecond Spark Gap Switches,” Proc. 12th International Pulsed Power Conference, C. Stallings and H. Kirbie, Eds pp. 1171-1174, 1999.
28) J.M. Lehr, J.W. Burger, W.D. Prather, M.D. Abdalla, M.C. Skipper, B. Cocharan, F. Gruner, J. Fokkler and I. Smith, “Design and Development of a 1 MV, Compact Self Break Switch for High Repetition Rate Operation,” Proc. 12th International Pulsed Power Conference, C. Stallings and H. Kirbie, Eds, pp.1199-1202, 1999.
29) J. Mankowski, J. Dickens, M. Kristiansen, J.M. Lehr, W.D. Prather and J. Gaudet, ”High Voltage Subnanosecond Corona Inception,” Proc. 12th International Pulsed Power Conference, C. Stallings and H. Kirbie, Eds, pp.1932-1395, 1999.
30) J.M. Elizondo and J.M. Lehr, “High Current Cathodes with Controlled A-K Gap Closure,” Proceeding of the Ninth National High Power Microwave and Radio Frequency Electromagnetics Symposium, Albuquerque, New Mexico, May, 1999.
31) J. Burger, R. Hackett, J.M. Lehr, W. Prather, W. Walton, H. Dogliani, S. Ahern, M. Abdalla, M. Skipper, F. Gruner, B. Cockreham, D. McLemore, H. LaValley, T. Smith, I. Smith, J. Prewitt, and D. Giri, “From Drawing Board to Development: A System Overview of the JOLT HPM System,” Proceeding of the Ninth National High Power Microwave and Radio Frequency Electromagnetics Symposium, Albuquerque, New Mexico, May, 1999.
32) M. Abdalla, S. Ahern B. Cockreham, , F. Gruner, J. Fockler, J.M. Lehr, M. Skipper, J. O’Loughlin and I. Smith, “From Oil to Hydrogen and their Union: The JOLT HPM Source Pulse Forming Network,” Proceeding of the Ninth National High Power Microwave and Radio Frequency Electromagnetics Symposium, Albuquerque, New Mexico, May, 1999.
33) J.M. Lehr, J.P. O’Loughlin, G.J. Rohwein, K.P. Prestwich, I.D. Smith, and B.K. Stewart, “The JOLT Transformer: A Compact, High Efficient Air Core Transformer,” Proceeding of the Ninth National High Power Microwave and Radio Frequency Electromagnetics Symposium, Albuquerque, New Mexico, May, 1999.
34) J. M. Lehr, E.E. Kunhardt, “Progress in the Development of a Monte Carlo Simulation for Electron Transport in Simple Liquids,” AFOSR Workshop in Electromagnetics, San Antonio TX, January 1999.
35) J. M. Lehr and Carl E. Baum, “Tailoring of the Transmitted Waveform from a Spark Gap via System Geometry,” North American URSI, National Radio Science Meeting, Boulder CO, January 1999.
36) J.M. Lehr, “Effect of De-aeration on the Electrical Breakdown Characteristics of Water,” Proceedings of the Conference on Electrical Insulation and Dielectric Phenomena, Atlanta GA, October 1998.
37) T. W. Hussey, V. K. Johnson, E. E. Kunhardt, J. M. Lehr, and R. C. Pate, “Comments on the Resistivity of High Pressure, Nanosecond, Spark Gap Switches,” ICOPS 98, Raleigh NC, June 1998.
38) C. E. Baum and J. M. Lehr, “The Disrupter,” Transient Radiating Antenna Memos, Memo No. 4, May 1998.
39) J. M. Lehr, M. D. Abdalla, J. W. Burger, J. S. H. Schoenberg, M. C. Skipper, and J. S. Tyo, “Progress Toward a Compact, High Power Ultra-wideband Array using Gallium Arsenide Photoconductive Semiconductor Switches,” Proceedings of the Twenty-third International Power Modulator Symposium, 1998.
40) J.S.H. Schoenberg, W.D. Prather, C.E. Baum, C.J. Buchenauer, J.W. Burger, J.M. Lehr, D.W. Scholfield, R.J. Torres and J.S. Tyo, “Summary of Progress in UWB Photoconductive Semiconductor Switches (PCSS) for HPM,” DARPA Megawatt Pulse Power Symposium, Army Research Laboratory, Aberdeen Proving Grounds, MD, 1998.
41) J.M. Lehr, J. Elizondo, R. Hackett, and K.R. Prestwich, “A Powerful Modeling Technique for Predicting the Spectrum of Integrated Radiation Systems,” North American URSI, National Radio Science Meeting, Boulder CO, January 1998.
42) J.M. Lehr, F. J. Agee, C.E. Baum, and W.D. Prather, “Short Pulse Breakdown in Liquids and the Physical Limitations on Attainable Risetimes,” AFOSR Workshop in Electromagnetics, San Antonio TX, January 1998.
43) J. Mankowski, J. Dickens, M. Kristiansen, F.J. Agee, W.D. Prather, and J.M. Lehr, “High Voltage Subnanosecond Dielectric Breakdown,” Digest of Technical Papers, International Workshop on High Power Microwave Generation and Pulse Shortening, Edinburgh, Scotland, June 1997.
44) J. M. Lehr, C. E. Baum, W. D. Prather, and F. J. Agee, “Aspects of Ultrafast Spark Gap Switching for UWB HPM Generation,” Proc. 11th International Pulsed Power Conference, pp. 1033-1041, G. Cooperstein and H. Kirby, Eds., 1997.
45) J.M. Lehr, F,J. Agee, C.E. Baum, and W.D. Prather, “Aspects of Ultrafast Spark Gap Switching for UWB HPM Generation,” Proceedings of the International Workshop on High Power Microwave Generation and Pulse Shortening, F.J. Agee and D.M. Parkes, Eds., 1997.
46) J. Mankowski, F. J. Agee, L. L. Hatfield, J. M. Lehr, M. Kristiansen, and J. Wells, “High Voltage Subnanosecond Dielectric Breakdown,” ICOPS, June 1997.
47) J.M. Lehr, R. Copeland, W.D. Prather, and J. Wells, “Measurement of the Electrical Breakdown Strength of Transformer Oil in the Subnanosecond Regime and its Relationship to UWB HPM Source Development,” Eighth National Conference on High Power Microwave Technologies, Laurel MD, April 1997.
48) J. M. Lehr, Maj P. Barre, and Lt E. Johnson, “Wide Bandwidth, Compact Voltage Divider Probes for High Frequency Electromagnetic Effects Experiments” Eighth National Conference on High Power Microwave Technologies, Laurel MD, April 1997.
49) J.M. Lehr, P. Barre, and E. Johnson, “Derivation of a Correlation Factor for use with Upset Power Levels Obtained by High Frequency Direct Injection Testing,” Eighth National Conference on High Power Microwave Technologies, Laurel MD, April 1997.
50) J.M. Lehr, W.R. Cravey, and C.M. Young, “The Linear Pseudospark: A High Current Switch for use in HPM Generation,” Eighth National Conference on High Power Microwave Technologies, Laurel MD, April 1997.
51) E. Savrun, H. DelAguilar, J. Lehr, “EMI/RFI Shielding of RF Windows,” AMEREM, Albuquerque NM, 1996.
52) C. Courtney, G. Demuth, J. Lehr, V. Martinez, “Breakout Box for Direct Injection Experiments of Aircraft Electromagnetic Susceptibility,” AMEREM, Albuquerque NM, 1996.
53) J.M. Lehr, H. Del Aguilar, “Large Aircraft Cavity Pumping and Commercial GPS Susceptibility Evaluation,” Reverberation and Anechoic Chamber Operators Group, 1995.
54) J. Messerschmitt (Lehr), E.E. Kunhardt, “Investigations of the Pressure Dependence of Electrical Breakdown of Purified Water and Saline Solution,” Ninth Pulsed Power Conference, K. Prestwich and W. L. Baker, Eds. 1993.
55) F.M. Lehr, J.H. Degnan, D.Dietz, S.E. Englert, T.J. Englert, T.W. Hussey, G.F. Kiuttu, J. Messerschmitt (Lehr), B.W. Mullins, C.A. Outten, R.E. Peterkin Jr., N.F. Roderick, P.J. Turchi, “Progress on the Formation of a High Density Working Fluid for Solid Liner Implosions,” Ninth Pulsed Power Conference, K. Prestwich and W. L. Baker, Eds., 1993.