Publications
 
For a pdf version of Dr. Montgomery’s dissertation, please go to the Downloads page
 
Past Refereed Journal Articles
 
1.    S. A. Khan, E. J. Montgomery, B. C. Riddick and P. G. O'Shea. "Fabrication and Characterization of Cesium-based Photocathodes for Free Electron Lasers." J. Vac. Sci. Tech. B, 30(3), 031207 (2012).
2.    Z. Pan, K. Jensen and P. O'Shea. "Modeling the Quantum Efficiency of Controlled Porosity Dispenser Photocathodes." Appl. Phys. Lett., 100(3), 034102 (2012).
3.    K. L. Jensen, J. Lebowitz, Y. Y. Lau and J. Luginsland. "Space charge and quantum effects on electron emission." J. Appl. Phys., 111(5), 054917 (2012).
4.    K. L. Jensen. "Space charge, emittance, trajectories, and the modeling of field emitter arrays." J. Vac. Sci. Tech. B, 29(2), 02B101 (2011).
5.    K. L. Jensen, E. J. Montgomery, D. W. Feldman, P. G. O'Shea, J. R. Harris, J. W. Lewellen and N. Moody. "Multiple scattering effects on quantum efficiency and response time for cesiated metal photocathodes." J. Appl. Phys., 110(3), 034504 (2011).
6.    K. L. Jensen, P. G. O'Shea and D. W. Feldman. "Emittance of a photocathode: Effects of temperature and field." Phys. Rev. ST Accel. Beams, 13(8), 080704 (2010).
7.    K. L. Jensen. "Space charge effects in field emission: Three dimensional theory." Journal of Applied Physics, 107(1), 014905 (2010).
8.    A. Rokhlenko, K. L. Jensen and J. L. Lebowitz. "Space charge effects in field emission: One dimensional theory." Journal of Applied Physics, 107(1), 014904 (2010).
9.    K. L. Jensen, P. G. O'Shea, D. W. Feldman and J. L. Shaw. "Emittance of a field emission electron source." J. Appl. Phys., 107(1), 014903 (2010).
10.    K. L. Jensen and E. J. Montgomery. "Photoemission Theory and the Development of High Performance Photocathodes." J. Comp. Th. Nanosci., 6(8), 1754 (2009).
11.    K. L. Jensen, Y. Y. Lau, D. W. Feldman and P. G. O’Shea. "Electron emission contributions to dark current and its relation to microscopic field enhancement and heating in accelerator structures." Physical Review Special Topics Accelerators and Beams, 11(8), 081001 (2008).
12.    K. L. Jensen, B. L. Jensen, E. J. Montgomery, D. W. Feldman, P. G. O'Shea and N. Moody. "Theory of photoemission from cesium antimonide using an alpha-semiconductor model." J. Appl. Phys., 104(4), 044907 (2008).
13.    K. L. Jensen et al. "Application of a general electron emission equation to surface nonuniformity and current density variation." J. Vac. Sci. Tech. B, 26(2), 831 (2008).
14.    C. Hernandez-Garcia, P. G. O'Shea and M. L. Stutzman. "Electron Sources for Accelerators." Physics Today, 61(2), 44 (2008).
15.    E. J. Montgomery, D. W. Feldman, P. G. O’Shea, Z. Pan, N. Sennett, K. L. Jensen and N. A. Moody. "Advances in Cesium Dispenser Photocathodes: Modeling and Experiment." Journal of Directed Energy, 3(1), 66 (2008).
16.    N. A. Moody, K. L. Jensen, D. W. Feldman, E. J. Montgomery and P. G. O'Shea. "Factors affecting performance of dispenser photocathodes." J. Appl. Phys., 102(10), 104901 (2007).
17.    K. L. Jensen, N. A. Moody, D. W. Feldman, E. J. Montgomery and P. G. O'Shea. "Photoemission from metals and cesiated surfaces." J. Appl. Phys., 102(7), 074902 (2007).
18.    K. L. Jensen. "General formulation of thermal, field, and photoinduced electron emission." J. Appl. Phys., 102(2), 024911 (2007).
19.    N. A. Moody, K. L. Jensen, D. W. Feldman, P. G. O'Shea and E. J. Montgomery. "Prototype Dispenser Photocathode: Demonstration and Comparison to Theory." Applied Physics Letters, 90(11), 114108 (2007).
20.    K. L. Jensen, D. W. Feldman, N. A. Moody and P. G. O'Shea. "A Photoemission Model for Low Work Function Coated Metal Surfaces and Its Experimental Validation." J. Appl. Phys., 99(12), 124905 (2006).
21.    K. L. Jensen, P. G. O'Shea, D. W. Feldman and N. A. Moody. "Theoretical Model of the Intrinsic Emittance of a Photocathode." Appl. Phys. Lett., 89(22), 224103 (2006).
22.    K. L. Jensen and M. Cahay. "General Thermal-field Emission Equation." Applied Physics Letters, 88(15), 154105 (2006).
23.    K. L. Jensen, D. W. Feldman, N. A. Moody and P. G. O'Shea. "Field-enhanced Photoemission From Metals and Coated Materials." Journal of Vacuum Science & Technology B, 24(2), 863 (2006).
24.    K. L. Jensen, D. W. Feldman and P. G. O'Shea. "Time Dependent Models of Field-assisted Photoemission." Journal of Vacuum Science & Technology B, 23(2), 621 (2005).
25.    K. L. Jensen, D. W. Feldman and P. G. O'Shea. "The Quantum Efficiency of Dispenser Photocathodes: Comparison of Theory to Experiment." Applied Physics Letters, 85(22), 5448 (2004).
26.    K. L. Jensen. "Electron emission theory and its application: Fowler-Nordheim equation and beyond." J. Vac. Sci. Tech. B, 21(4), 1528 (2003).
27.    K. L. Jensen, D. W. Feldman, M. Virgo and P. G. O'Shea. "Measurement and Analysis of Thermal Photoemission From a Dispenser Cathode." Phys. Rev. ST Accel. Beams, 6(8), 083501 (2003).
28.    K. L. Jensen, D. W. Feldman, M. Virgo and P. G. O'Shea. "Infrared Photoelectron Emission From Scandate Dispenser Cathodes." Applied Physics Letters, 83(6), 1269 (2003).
29.    K. L. Jensen, D. W. Feldman and P. G. O'Shea. "Advanced photocathode simulation and theory." Nucl. Instrum. Methods Phys. Res. A, 507, 238 (2003).
30.    K. L. Jensen, P. G. O'Shea and D. W. Feldman. "Generalized Electron Emission Model for Field, Thermal, and Photoemission." Appl. Phys. Lett., 81(20), 3867 (2002).
31.    P. G. O'Shea and H. G. Freund. "Free-Electron Lasers: Status and Applications." Science, 292, 1853 (2001).
 
 
Past Conference Publications and Presentations
 
1.    E. Montgomery, B. Riddick, D. Feldman, P. O'Shea, A. Day, R. L. Ives and L. Falce. "Enhanced Lifetime Hybrid-Diffuser Cesium Reservoir Photocathodes." AIP Conf. Proc., 1507, 933 (2013).
2.    K. L. Jensen, J. E. Yater, J. L. Shaw, B. B. Pate, E. J. Montgomery, D. W. Feldman, P. G. O'Shea and J. J. Petillo. "Scattering and the prediction of Quantum Efficiency and response time characteristics." Proc. 9th Int'l. Vac. Electron Sourc. Conf., 249 (2012).
3.    E. J. Montgomery, B. C. Riddick, S. A. Khan, P. Z. Pan, D. W. Feldman, P. G. O'Shea and K. L. Jensen. "Development of Alkali-Based High Quantum Efficiency Semiconductors for Dispenser Photocathodes." Proc. Particle Accel. Conf. 2011, THP208, (2011).
4.    K. L. Jensen, J. E. Yater, J. L. Shaw, B. B. Pate, E. J. Montgomery, D. W. Feldman and P. G. O'Shea. "Time dependent emission from coated metals and semiconductors." 24th Int'l Vac Nanoelec Conf, 91 (2011).
5.    K. L. Jensen, J. E. Yater, B. B. Pate, J. L. Shaw, E. J. Montgomery, D. W. Feldman and P. G. O'Shea. "Electron transport and emission from thin film semiconductors." Proc. 11th IEEE Int'l Vac. Elec. Conf., 209 (2010).
6.    B. C. Riddick, E. J. Montgomery, S. A. Khan, D. W. Feldman and P. G. O'Shea. "Measurement and Analysis of Quantum Efficiency of Cesium Auride Photocathodes." DEPS Dir. Energ. Symp., Bethesda, MD, (2010).
7.    E. J. Montgomery, D. W. Feldman, P. G. O'Shea, P. Z. Pan, N. Sennett and K. L. Jensen. "Electron emission from alkali-coated metal photocathodes." Proc. 11th IEEE Int'l Vac. Elec. Conf., 79 (2010).
8.    E. J. Montgomery. "Characterization of Quantum Efficiency and Robustness of Cesium-Based Photocathodes." Doctor of Philosophy, Department of Physics, University of Maryland (2010).
9.    E. J. Montgomery, D. Feldman, P. G. O'Shea, J. R. Harris, J. C. Jimenez and K. L. Jensen. "Cesium Emission in Dispenser Photocathodes." Proc. 32nd Intl. FEL Conf., Malmö, WEPB12, (2010).
10.    S. A. Khan, E. J. Montgomery, P. G. O'Shea and B. C. Riddick. "Fabrication and Characterization of Cesium Auride Photocathodes for Free Electron Lasers." DEPS Dir. Energ. Symp., Bethesda, MD, (2010).
11.    E. J. Montgomery, P. Z. Pan, J. Leung, D. W. Feldman, P. G. O'Shea and K. L. Jensen. "Towards a Robust, Efficient Dispenser Photocathode: the Effect of Recesiation on Quantum Efficiency." AIP Conf. Proc., 1086, 599 (2009).
12.    K. L. Jensen et al. "Electron Transport and Photoemission in Coated Semiconductors and Thin Films." 12th Directed Energy Symposium, (2009).
13.    E. J. Montgomery, D. W. Feldman, P. G. O'Shea, P. Z. Pan, N. Sennett, C. Stortstrom and K. L. Jensen. "Towards a Multialkali Dispenser Photocathode: Experiment and Theory." Proc. 31st Intl. FEL Conf., Liverpool, (2009).
14.    E. J. Montgomery, D. W. Feldman, P. G. O'Shea, Z. Pan, N. Sennett, K. L. Jensen and N. A. Moody. "Demonstration and Characterization of Alkali Antimonide Dispenser Photocathodes." 10th Directed Energy Symposium, (2007).
15.    K. L. Jensen, D. W. Feldman, E. J. Montgomery, N. A. Moody and J. Petillo. "A Theoretical Photocathode Emittance Model Including Temperature and Field Effects." Proc. IEEE Particle Accel. Conf., TUPMS091 (2007).
16.    E. J. Montgomery, D. W. Feldman, P. G. O'Shea, Z. Pan, N. A. Moody and K. L. Jensen. "Fabrication and Measurement of Efficient, Robust Cesiated Dispenser Photocathodes." Proc. IEEE Particle Accel. Conf., TUPMS010 (2007).
17.    K. L. Jensen, D. W. Feldman, P. G. O'Shea, N. A. Moody, M. Cahay and E. J. Montgomery. "Development of a general thermal-field-photoemission model and its relation to current density, emittance, and beam brightness." IEEE 20th International Vacuum Nanoelectronics Conference, 2007., 42 (2007).
18.    K. L. Jensen, J. J. Petillo, D. W. Feldman, E. J. Montgomery, P. G. O'Shea, N. A. Moody, J. L. Shaw and J. E. Yater. "Application of a general electron emission equation to surface non-uniformity and current density variation." IEEE 20th International Vacuum Nanoelectronics Conference, 167 (2007).
19.    N. A. Moody, K. L. Jensen, D. W. Feldman and P. G. O'Shea. "Experimental Validation of a Photoemission Model for End-to-end Beam Simulations and Custom Photocathode Designs." IEEE International Vacuum Electronics Conference, 2006 Held Jointly With 2006 IEEE International Vacuum Electron Sources, 429 (2006).
20.    N. A. Moody. "Fabrication and Measurement of Regenerable Low Work Function Dispenser Photocathodes." Doctor of Philosophy, Department of Electrical and Computer Engineering, University of Maryland (2006).
21.    K. L. Jensen, N. A. Moody, D. W. Feldman, P. G. O'Shea, J. E. Yater and J. Shaw. "The Development and Application of a Photoemission Model for Cesiated Photocathode Surfaces." Proc. 28th Intl. FEL Conf., Berlin, Germany, THPPH068 (2006).
22.    N. A. Moody, D. W. Feldman, K. L. Jensen, E. J. Montgomery, A. E. Balter, P. G. O’Shea, J. E. Yater and J. L. Shaw. "Experimental Progress Toward Low Workfunction Controlled Porosity Dispenser Photocathodes." Proc. 28th Intl. FEL Conf., Berlin, Germany, THPPH069 (2006).
23.    N. Moody, D. W. Feldman, P. G. O'Shea and K. L. Jensen. "Fabrication and Measurement of Low Workfunction Cesiated Dispenser Photocathodes." Proceedings of the IEEE Particle Accelerator Conference, 2953 (2005).
24.    K. L. Jensen, D. W. Feldman, N. A. Moody, J. Shaw, J. E. Yater and P. G. O'Shea. "Field-enhanced Photoemission From Metals and Coated Materials." Technical Digest of the 18th International Vacuum Nanoelectronics Conference, 3 (2005).
25.    K. L. Jensen, D. W. Feldman, N. A. Moody, P. G. O'Shea and A. Balter. "Photoemission from Coated Surfaces: Comparson of Theory to Experiment." Proc. 27th Intl. FEL Conf., Stanford, CA, TUPP060, 355 (2005).
26.    N. A. Moody, D. W. Feldman, P. G. O'Shea, K. L. Jensen and A. Balter. "Measurement of Low Workfunction Cesiated Metals for Use in Dispenser Photocathodes." Proc. 27th Intl. FEL Conf., Stanford, CA, MOPP050, 168 (2005).
27.    K. L. Jensen, D. W. Feldman and P. G. O'Shea. "Time-dependent Models of Field-assisted Photoemission." Technical Digest of the 17th International Vacuum Nanoelectronics Conference, 172 (2004).
28.    N. A. Moody. "Fabrication and Measurement of Cesiated Metal Photocathodes." Master of Science, Electrical and Computer Engineering, University of Maryland (2004).
29.    K. L. Jensen, D. W. Feldman, N. Moody, D. Demske and P. G. O'Shea. "Thermal and field enhanced photoemission: comparison of theory to experiment." Proc. 26th Intl. FEL Conf., Trieste, Italy, TUPOS65 (2004).
30.    D. W. Feldman, P. G. O'Shea, M. Virgo and K. L. Jensen. "Development of Dispenser Photocathodes for Rf Photoinjectors." Proc. IEEE Particle Accel. Conf., 5, 3323 (2003).
31.    D. W. Feldman, A. Valfells, J. Neumann, J. Harris, B. Beaudoin, P. G. O'Shea and M. Virgo. "Combined thermionic and photoelectric emission from dispenser cathodes." Proceedings of the 2001 Particle Accelerator Conference, 2132 (2001).