dmcdermott@ucdavis.edu

MAIL: LLNL // PO Box 808 (L-637) // Livermore, CA 94550

TEL: (925) 422-8572

FAX: (925) 424-5114

.

**Education**

**B.S., Physics, University of
California, Davis, 1976**

**M.A., Applied Physics, Columbia
University, 1977**

**M.Phil., Applied Physics, Columbia
University, 1979**

**Ph.D., Applied Physics, Columbia
University, 1979**

**.**

**Biography**

**An intense relativistic electron
beam at the Naval Research Laboratory in Washington, D.C., was used in
Dr. McDermott's thesis research to generate high power, submillimeter-wave
radiation through the free-electron-laser instability. After two years
in a postdoctoral position at Columbia, Dr. McDermott joined the Electrical
Engineering Department at UCLA as an Assistant Research Engineer under
Prof. Luhmann. In 1994, Dr. McDermott transferred with Prof. Luhmann to
the Department of Applied Science at the University of California at Davis
as a Research Engineer.**

**Dr. McDermott has remained actively
involved in the field of electron/wave interaction since he began his graduate
research in 1976. At UCLA, his research resulted in the development of
moderate power, millimeter-wave, high-harmonic gyrotron oscillators and
amplifiers driven by gyroresonantly rf accelerated electron beams; a dielectic-loaded
wideband gyroTWT amplifier; gyrofrequency multipliers; and a high power,
second-harmonic gyroTWT amplifier. He is particularly interested in the
relation between harmonic interaction and symmetry and has also contributed
to the evolution of microwave and quasi-optical components, including broadband,
overmoded couplers, mode convertors and low loss transmission lines.**

**Before actually testing their
innovative devices in full-scale experiments, Dr. McDermott's research
group first makes extensive use of simulation codes to design the electromagnetic
circuits and then precise network-analyzer measurements to optimize them.
His current projects include a high-performance W-band (94 GHz) gyro-TWT
amplifier and three harmonic gyro-devices driven by low-voltage axis-encircling-electron
Cusp guns: a sixth-harmonic slotted gyrotron; an extremely efficient, second-harmonic
slotted peniotron; and a second-harmonic gyro-TWT amplifier. David McDermott
is a member of APS and a Senior Member of the IEEE.**

**.**

**Recent Major Publications**

**"Demonstration of Marginal Stability
Theory by a 200 kW Second-Harmonic Gyro-TWT Amplifier," Q.S. Wang, D.B.
McDermott and N.C. Luhmann, Jr., Phys. Rev. Lett., vol. 75, 4322 (1995).**

**"Broadband Linearly-Polarized
Beat-Wave TEm1/TE11 Mode Converter," D.B. McDermott, J. Pretterebner, C.K.
Chong, C.F. Kinney, M.M. Razeghi, and N.C. Luhmann, Jr., IEEE Trans. Microwave
Theory Tech., vol. 44, 311 (1996).**

**"Periodic Permanent Magnet Focusing
of an Annular Electron Beam and its Application to a 250 MW Ubitron Free-Electron
Maser," D.B. McDermott, A.J. Balkcum, R.M. Phillips and N.C. Luhmann, Jr.,
Phys. Plasmas, vol. 2, 4332 (1995).**

**"Experimental Investigation of
a Broadband Gyro-TWT Amplifier," K.C. Leou, D.B. McDermott, C.K. Chong,
and N.C. Luhmann, Jr., IEEE Trans. on Electron Devices, vol. 43, 1016 (1996).**

**"Marginal Stability Design Criterion
for Gyro-TWT's and Comparison of Fundamental with Second Harmonic Operation,"
A.T. Lin, K.R. Chu, C.C. Lin, C.S. Kou, D.B. McDermott, and N.C. Luhmann,
Jr., Int. J. Electronics, vol. 5, 873 (1992).**

**.**

**Research Projects**

**.**

*Gyrotrons and Peniotrons*

*High-Harmonic Gyrotrons (Third-Eleventh
Harmonics, 1 kW, 10% efficient)*

*Sixth-Harmonic
Slotted Gyrotron (94 GHz, 50 kW, 20% efficiency predicted)*

*High-Efficiency
Second-Harmonic Peniotron (33 GHz, 130 kW, 50% efficiency predicted)*

*Compact
CW High-Harmonic Gyrotrons (35 and 95 GHz, 25 kW with 20% efficiency
predicted)*

*Prebunched
Gyrofrequency Multipliers (Third-Sixth Harmonics, 1 kW, 15% efficient)*

*.*

*Gyroklystron Amplifiers*

*Fifth-Harmonic Gyroklystron
(0.5 kW, 5% efficient, 30 dB gain)*

*High
Performance TE0n Gyroklystron (under test, 250 kW with 40% efficiency
predicted)*

*Third-Harmonic Gyroklystron
(70 kW with 20% efficiency predicted)*

*.*

*GyroTWT Amplifiers*

*Second-Harmonic
GyroTWT (210 kW, 13% efficiency, 2% bandwidth, 16 dB gain)*

*Slotted
Third-Harmonic GyroTWT (13 dB small-signal gain with 3% bandwidth)*

*Eighth-Harmonic Gyro-TWT (1
kW, 4% bandwidth, 2% efficiency, 10 dB gain)*

*Dielectric-Loaded
Broadband GyroTWT (12% bandwidth, 55 kW, 11% efficiency, 27 dB gain)*

*Disk-Loaded Broadband GyroTWT
(100 kW with 25% bandwidth predicted)*

*Second-Harmonic
Cusp-Gun Gyro-TWT (50 kW at 30 GHz, 3% bandwidth, 20% efficiency, 30
dB gain is predicted)*

*High-Performance
W-band Gyro-TWT (100 kW at 94 GHz, 4% bandwidth, 20% efficiency, 40
dB gain is predicted)*

*.*

*Free Electron Lasers*

*700 GHz FEL (Ph.D. thesis,
1 MW)*

*Low-Voltage, Broadband Disk-Loaded
FEL Amplifier (20% bandwidth predicted)*

*High
Power 11 GHz FEL Amplifier for 1 TeV Colliders (250 MW with 40% efficiency
predicted)*

*High
Power 3 GHz FEL Oscillator for Directed Energy (1 GW with 21% efficiency
predicted)*

*.*

*Electromagnetic Circuits*

*Bragg Reflectors (98% reflection
with 10% bandwidth)*

*Overmoded Couplers (1 dB coupler
for TE21 mode with 20% bandwidth)*

*Beat-Wave TEm1/TE11 Mode Converters
(98% conversion efficiency for TE31 into TE11 mode)*

*Mode Selective Circuits (100:1
attenuation selectivity between even and odd order TEm1 modes)*

*.*

*RF Accelerators*

*Gyroresonant RF Accelerator
(0.5 MeV, 0.3 A, 45% efficient, helical electron beam*

*Linear RF Accelerator (0.5
MeV, 0.1 A linear electron beam)*

*.*

*Current Students*

*.*

*John McNally*

*mcnally@wente.das.engr.ucdavis.edu*

*Ph.D. Thesis: High Performance
TE0n Gyroklystron Amplifier*

*.*

*Ron Stutzman*

*stutz@ece.ucdavis.edu*

*Ph.D. Thesis: Sixth-Harmonic
Slotted TE61 Gyrotron*

*.*

*Steve Harriet*

*Harriet_Steve@crane.navy.mil*

*Ph.D. Thesis: Second-Harmonic
Cusp-Gun TE21 Gyro-TWT*

*.*

*Larry Dressman*

*dressman_larry@crane.navy.mil*

*Ph.D. Thesis: High Efficiency
Second-Harmonic TE31 Peniotron*

*.*

*Former Students*

*.*

*A. Kupiszewski, M.S., 1983*

*KUPISZEWSKI.ALEK-@postal.essd.northgrum.com*

*Manager*

*Current Address: Westinghouse
Electric, PO Box 746, MS 491, Baltimore, MD 21203*

*.*

*D.S. Furuno, Ph.D., 1987*

*furuno@mmcado.com*

*Manager*

*Current Address: Lockheed
Martin, Missiles and Space Communications, Santa Clara, CA.*

*.*

*C.S. Kou, Ph.D., 1991*

*kou@phys.nthu.edu.tw*

*Assistant Professor*

*Current Address: Department
of Physics, National Tsing Hua University, ROC.*

*.*

*K.C. Leou, Ph.D., 1993*

*kcleou@ne.nthu.edu.tw*

*Assistant Professor*

*Current Address: Department
of Engineering and System Science, National Tsing Hua University, ROC.*

*.*

*Q.S. Wang, Ph.D., 1994*

*qswang@ix.netcom.com*

*Engineer*

*Current Address: Micramics,
Inc., Santa Clara, CA 95051*

*.*

*C.K. Chong, Ph.D., 1995*

*Chae.Chong@HughesED.com*

*Engineer*

*Current Address: Hughes Electron
Dynamics Division, Torrance, CA*

*.*

*A.J. Balkcum, Ph.D., 1998*

*ADAM.BALKCUM@mpp.cpii.com*

*Engineer*

*Current Address: CPI, 811
Hansen Way (M/S B-450), PO Box 50750, Palo Alto, CA 94303-0750*

*.*

*Facilities*

*.*

*Solenoid Magnets*

*50 kG, 50 cm length, 15 cm
bore, refrigerated superconducting solenoid*

*60 kG, 40 cm length, 10 cm
bore, superconducting solenoid*

*40 kG, 15 cm length, 8 cm
bore, superconducting solenoid*

*30 kG, 10 cm length, 10 cm
bore, superconducting solenoid*

*30 kG, 5 cm length, 10 cm
bore, superconducting solenoid*

*4 kG, 100 cm length, 15 cm
bore, copper solenoid*

*3 kG, 150 cm length, 20 cm
bore, copper solenoid*

*7 kG, 25 cm length, 15 cm
bore, copper solenoid*

*.*

*High Voltage Modulators*

*400 kV, 500 A, 2 Hz*

*100 kV, 50 A, 2 Hz*

*100 kV, 20 A, 2 Hz*

*50 kV, 20 A, 2 Hz*

*.*

*Electron Guns*

*350 kV, 400 A, SLAC linear-beam
guns*

*80 kV, 10 A, commercial magnetron
injection guns*

*100 kV, 20 A, custom magnetron
injection guns*

*50 kV, 20 A custom linear-beam
guns*

*.*

*Millimeter-Wave Hardware*

*Kilowatt-level pulsed sources*

*Watt-level CW sources*

*Continuous multi-mW coverage
from DC-170 GHz*

*Abundant waveguide components
(bends, tuners, transitions, etc. )*

*.*

*Computational*

*Computers (inc. Sun, Pentium,
HP-Apollo, Macintosh, DEC-Net, Cray-Access)*

*Software (inc. MAGIC, HFSS,
EGUN)*

*.*

*Current Funding*

*AFOSR under Grant F49620-99-1-0297
(MURI)*