University of Hawaii Ph. D. Physics Dec., 1999



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Curriculum Vitae
Gary S. Varner

EDUCATION




University of Hawaii Ph.D. Physics Dec., 1999


Boston University M.A. Physics May, 1995

Boston University B.S. Electrical Engineering May, 1989



HONORS AND AWARDS



University-based Linear Collider Detector R&D award

DOE Advanced Detector Research award, Twice, June 2006 and June 2008


Invited SLAC Experimental Seminar, Stanford Linear Accelerator Center, March 2007
Invited Advanced Instrumentation Seminar, Twice, SLAC National Accelerator Laboratory, July 2007 and July 2009

Spokesperson, T-943 Experiment at Fermilab (High Speed Pixel Detectors)


Invited Plenary Speaker, Stanford-Novosibirsk Instrumentation Conference (SNIC06), Stanford Linear Accelerator Center (SLAC), April 2006

Invited Plenary Speaker, Colliders to Cosmic Rays Symposium, Prague Czech Republic, September 2005


Invited Plenary Speaker, 5th Solid-state Tracking Detector (Hiroshima) Symposium, Hiroshima Japan, June 2004

Invited Plenary Speaker, Inaugural Australia-New Zealand Silicon Detector Symposium, Wellington New Zealand, June 2004

Co-Investigator, Antarctic Impulsive Transient Antenna (ANITA) – NASA Small Explorer Phase A award, October, 2003

Co-Investigator, Antarctic Impulsive Transient Antenna (ANITA) – NASA ROSS SR&T award, 2002

Invited Plenary Speaker, APPC Linear Collider Workshop, Taipei Taiwan, Aug. 2000

Research Fellowship, Laboratory of Instrumentation and Particles, Portugal 1997

R&D 100 Award for development of Time Stretcher circuit, 1997

Invited Plenary Speaker, 3rd Tau-Charm Factory Workshop, Beijing China, January 1996

Soldier of the Cycle, Nuclear Biological & Chemical Warfare School, US Army, 1985


THESES

Varner, G. (1999). A Study of Hadronic Decays of the Chi(c) States Produced in Psi-prime Radiative Transistions at the Beijing Experimental Spectrometer. Unpublished University of Hawaii Dissertation.


Varner, G. (1993). Online Particle Identification Detector K/ Separation for the Fast Strangeness Trigger at CPLEAR. Unpublished Boston University Dissertation.

PROFESSIONAL EXPERIENCE

2005-present

Assistant Professor of Physics

Department of Physics and Astronomy, University of Hawaii




  • Principle Investigator for Belle CMOS Pixel upgrade project

  • Co-Investigator for ANITA ultra high-energy neutrino project


  • Co-spokesman, Salt detector Shower Array (SalSA) project to explore deep inelastic neutrino-nucleon interactions at 100TeV center-of-mass energy



2002-2005

Director, Instrumentation Development Laboratory, University of Hawaii

Senior Electrical Engineer/Physicist




  • Conversion of requirements for world-class experimental research into working instrumentation, demanding a broad understanding of the physical principles involved and the limits of the technology available to solve such problems

  • Instruction, guidance and professional development of a continually evolving technical workforce often in excess of 10 students per semester

  • Innovation in the development of Application Specific Integrated Circuits (ASICs) to provide essential and enabling technologies to the ANITA experiment and Belle Pixel Vertex upgrades

  • Internal constructive critique and guidance of data analysis: charmonium analyses on BES and Belle, background/signal processing analysis on ANITA-lite

2001-2002


Senior Scientist, AOptix Technologies Campbell, California (silicon valley)

  • First principles analysis and simulation of the practical limits of communication over a free-space optical link

  • Key member of the scientific and engineering team which demonstrated > 330Gb/s free-space optical transmission over large distances with high reliability

1998-2001


EE/Physicist, University of Hawaii

  • Project lead for design, commissioning, operation and data analysis of the BEAST experiment, critical to background mitigation prior to the Belle detector roll-in

  • Set-up and development of the Silicon Pixel Laboratory, which would eventually evolve into the Instrumentation Development Laboratory

1997-1998


Visiting Researcher, CERN & L.I.P. Portugal, based at CERN, Geneva, Switzerland

  • Trigger impact studies for exclusive Compact Muon Solenoid (CMS) crystal Electromagnetic Calorimeter (ECAL) Tau event classification. Evolved into studies of B meson tagging efficiencies in CMS

  • Design, simulation and prototyping for the 6 Tera-Byte/s Trigger and Data Acquisition System for the CMS ECAL

  • Evaluation of failure detection/recovery methods for the CMS event-switch, a unit which will handle the equivalent volume of information per unit time of the entire 1998 world combined telecommunications volume

  • Studies of color-octet contributions to BES Chi(c) and p p-bar collisions

1995-1997


Research Associate, University of Hawaii

  • Lead member of the design team which developed a self-calibrating “Time Stretcher” circuit topology, a project that was awarded a 1997 R&D Magazine Top 100 honors

  • Conceived of, designed and developed the prompt charged-track trigger system for Belle, the Japanese B-Factory experiment at the KEK laboratory in Tsukuba, Japan

  • Development and instrumentation of superior performance particle identification detectors based on the Time-Of-Flight technique for high-rate, self-trigger measurements

1994-1995


Adjunct Professor

Wentworth Institute of Technology, Boston, Massachusetts



  • Taught courses in modern physics and lasers


1993-1995


Senior Electrical Engineer/Physicist, Boston University

  • Electronics coordinator for the US ATLAS detector muon system at the CERN Large Hadron Collider (LHC)

  • Detailed simulation and measurement of the Monitored Drift Tube (MDT) performance as a function of gas type and magnetic field for the ATLAS muon system

  • Fabrication and testing of a GaAs ASIC for ultra high-speed triggering applications, at the time probably the fastest non-military Bandwidth x Time chip ever made

1992-1993


Physics Design Engineer

Boston University and the Superconducting Super-Collider Laboratory, Boston / Dallas, TX



  • Designing, prototyping and costing of the anode readout of the Muon system cathode strip chamber instrumentation electronics of the GEM Detector project at the Superconducting Super-Collider

1987-1992


Research Associate/Graduate Research Associate, Boston University

  • Designed, built and calibrated a laser calibration system for the high-precision Particle Identification Detector (PID) system of the CP-LEAR experiment

  • Design, construction and implementation of high-speed analog and digital circuits, with an emphasis on ECL and fast TTL data transmission, crucial to establishing Kaon/pion separation within 2 micro-seconds after anti-proton annihilation.

  • Simulation studies of Kaon trigger efficiency

1986-1987


Research Assistant, Boston University

  • Assisted in setting-up, calibrating and monitoring a tagged photon beam at the MIT/Bates Linear Accelerator for calibration of the EGRET satellite for NASA prior to launch

  • Design, fabrication and test of Pb-glass block calorimeter arrays and pulsed LED fiber-optic calibration system for the Eta  gamma gamma experiment at MIT/Bates


TEACHING EXPERIENCE

University of Hawaii Formal Instruction




  • Instructor – PHYS274 (Modern Physics). Spring 2007

  • Instructor – PHYS 476 (Modern Electronics for Physicists. Proposed and campaigned for inclusion of this course into the curriculum. Approved summer 2005 and first taught Spring 2006 semester. Spring 2007, 2008.

  • Instructor – PHYS475 (Electronics for Physicists I). Revamped course as of Fall 2005 and even further in Fall 2006 to introduce concepts of programmable logic and firmware design – the workhorse of all modern electronics – to the lecture and laboratory. Fall 2007, 2008, 2009.

  • Instructor – PHYS305 (Computational Physics). Spring 2007, 2008.

  • Adjunct lecturer in PHYS 475 (Electronics for Physicists) course: Fall 2003 semester during Prof. Gorham’s deployment to Antarctica; Fall 2002 during intervals when his attendance was mandated away from Hawaii.

  • Guest lecturer in PHYS 475 course when Prof. Crooker had scheduling conflicts, 1997 - 2000

  • Teaching Assistant, Physics 100 laboratory, Fall 1995


NASA Space-Grant Fellowship


  • Mentored senior physics student Brandon Merz in the design and test of trigger test electronics for the Antarctic Impulsive Transient Antenna (ANITA).


Quarknet Program


  • Mentored High School physics teacher Peter Grach in the pioneering summer program to introduce the Quarknet program to Hawaii. Guided him in Time-Of-Flight long-term scintillator degradation studies, producing very interesting results to compare with those obtained in Japan

Wentworth Institute of Technology

  • Adjunct Professor, taught modern physics and laser courses, Fall 1994/Spring 1995

PAST AND PRESENT STUDENTS AND POSTDOCTORAL FELLOWS



Fang Fang (PhD with the High Energy Physics group)

  • Mentored on the readout and processing of pixel vertex detector prototypes

  • Currently Post-doctoral fellow at McGill University in Toronto on the ATLAS detector, for which she is applying the trigger firmware expertise developed under my guidance

Marlon Barbero (my Postdoctoral Fellow)

  • Significant contribution to

  • Currently Post-doctoral fellow at McGill University in Toronto on the ATLAS detector, for which she is applying the trigger firmware expertise developed under my guidance

Hulya Guler

  • Mentored through upgrade of the Belle Time of Flight Trigger electronics

  • Currently Post-doctoral fellow at McGill University in Toronto on the ATLAS detector, for which she is applying the trigger firmware expertise developed under my guidance

Maria Elena Martin (engineering PhD received from work done in my lab)

  • Mentored through the design, fabrication and evaluation of the Continuous Acquisition Pixel (CAP) monolithic active pixel sensor, which was the core of her doctoral thesis

  • Elena subsequently was hired as a postdoctoral fellow at the University College of Louvaine, Brussels

Jamal Rorie (currently my doctoral student in Physics)

  • Mentored through development of the Signal Timing And Readout (STAR) Front-end INstrumentation Entity for Subdetector Specific Electronics (FINESSE), a high-luminosity Time-Of-Flight upgrade

  • Awarded a …. Award for this development

Larry Ruckman (currently my Masters’ student in Physics)

  • Mentored Larry since he was an undergraduate

  • Have co-authored a number of high-impact Instrumentation papers on the high timing performance ASICs that we have developed

Michael Cooney (currently my doctoral student in Electrical Engineering)

  • Mentored through upgrade of the Belle Time of Flight Trigger electronics


INTERNATIONAL VISITORS TO THE ID-LAB



Finland Visitors (PhD with the High Energy Physics group)

  • Mentored on the readout and processing of pixel vertex detector prototypes

  • Currently Post-doctoral fellow at McGill University in Toronto on the ATLAS detector, for which she is applying the trigger firmware expertise developed under my guidance


SUMMARY OF GRANT APPLICATIONS
Successful grant applications require an enormous amount of time and effort. The probability of any given grant being selected the first time is low and may require repeated submissions before a strong enough case is made. A listing of the grants submitted during my probationary period is provided below. These are in addition to the yearly renewals that we provide for our DOE University program base grant.

“Development of the Continuous Acquisition Pixel Vertex Detector for High Luminosity e+e- Colliders” Principle Investigator, Department of Energy (DOE) 2006 Outstanding Junior Investigator program, 3-year, 382.2K$.

“Characterization of Microwave Continuum Emission from Ultra-High Energy Cosmic Ray Air Showers” co-Investigator (Gorham PI) , National Science Foundation (NSF) 2006 Particle Astrophysics program, 3-year, 478.4K$.

“Pixel-level Sampling CMOS Vertex Detector for the ILC” Principle Investigator, Joint NSF/DOE 2006 University Linear Collider R&D program, 1-year, 46.0K$.

“Collaborative Research: AURA (Askaryan Underice Radio Array) A Successor to RICE and Prelude to 10-km Scale Neutrino Detector” co-Investigator, NSF Office of Polar Programs 2006 initiative request, 2-year, 206.4K$.

“Development of Practical Large-Scale Radio Frequency Neutrino Detectors” Principle Investigator, 2006 NSF CAREER award, 5-year, 1,536.3K$.

“Fabrication of Askaryan Ground Electronics Station (CAGES)” Principle Investigator, 2007 Univ. of California Irvine subaward, 1-year, 9.0K$.

“Statement of Previous Scientific Work and Immediate Research Plans” Sloan Fellowship, 40.0K$.

“Development of a Photodetector Read Out Monolithic Precision Timing (PROMPT) Device” Principle Investigator, 2006 DOE Advanced Detector Research award, 1-year, 37.0K$.

“University of Hawaii Charmed Physics Research Center” co-Investigator, 2007 NSF PIRE initiative, 3-year, 300.0K$.

“Enhancing Physics Reach of High Luminosity e+e- Colliders with the Continuous Acquisition Pixel Vertex Detector” Principle Investigator, Department of Energy (DOE) 2007 Outstanding Junior Investigator program, 3-year, 388.4K$.

“A High Sensitivity Balloon-Borne Soft Gamma-ray Polarimeter” co-Investigator, 2007 NASA Research Opportunities in Spaces Science (ROSS) program, 3-year, 211.6K$.

“The Second Antarctic Impulsive Transient Antenna (ANITA) Mission” co-Investigator, 2007 NASA Research Opportunities in Spaces Science (ROSS) program, 3-year, 1,402.6K$.

“AURA2 Prototype Fabrication” Principle Investigator, 2007 Univ. of Wisconsin IceCube subaward, 1-year, 15.0K$.

“An IceCube-centered Radio Array for Ultra-High Energy Neutrino Event Cross-calibrations” co-Investigator, NSF Office of Polar Programs 2007 initiative request, 2-year, 300.0K$.

“Improved Super Flavor Factory Discovery Potential Through Improved Vertex Reconstruction” Principle Investigator, Department of Energy (DOE) 2008 Outstanding Junior Investigator program, 3-year, 388.4K$.

“Mission Concept for the Next Generation Gamma-Ray Space Telescope: The Advanced Pair Telescope (APT)” co-Investigator, 2007 NASA Research Opportunities in Spaces Science (ROSS) program, 1-year, 31.6K$.

“Continued funding: Pixel-level Sampling CMOS Vertex Detector for the ILC” Principle Investigator, Joint NSF/DOE 2007 University Linear Collider R&D program, 1-year, 48.0K$.

“A High Sensitivity Balloon-Borne Soft Gamma-ray Polarimeter” co-Investigator, 2008 NASA Research Opportunities in Spaces Science (ROSS) program, 3-year, 230.9K$.

“Three-Dimensional Track Imaging Detector for the Next-Generation Gamma-Ray Mission” co-Investigator, 2008 NASA Research Opportunities in Spaces Science (ROSS) program, 3-year, 239.4K$.

“Laboratory Particle Astrophysics: a system to study microwave emission from plasmas” Principle Investigator, Cottrell Scholar Award, 1-year, 100.0K$.

“High Precision Timing, Integrated Photodetector Readout” Principle Investigator, 2008 DOE Advanced Detector Research award, 1-year, 70.0K$.

“Time Resolved Spectrofluorimeter Readout” Principle Investigator, Joint Lightspin Technologies Small Business Innovation in Research (SBIR) award, 2-year, 150.0K$.

“A Highly Robust Sampling CMOS Vertex Detector” Principle Investigator, Joint NSF/DOE 2008 University Linear Collider R&D program, 1-year, 35.0K$.

“The Development of Large Area Fast Photo-detectors” co-Investigator, DOE Detector Development supplemental award, 3-year, 540.0K$.

“The Development of Large Area Fast Photo-detectors” co-Investigator, NSF/DHS Academic Research Initiative, 5-year, 713.7K$.

“Collaborative Research: MRI-R2 Instrument Development of the Askaryan Radio Array (ARA), A Large-scale Radio Cherenkov Neutrino Detector at the South Pole” co-Investigator, NSF Major Research Instrumentation award, 5-year, 230.0K$.

“High event rate readout electronics for imaging/timing microchannel plate cross-strip detectors” co-Investigator, DOE/NNSA Novel Remote Sensing Approaches award, 3-year, 391.2K$.

“Development of Fast, Precision Space-Time Semiconductor Detectors” Principle Investigator, Department of Energy (DOE) 2009 Early Career Research program, 5-year, 750.0K$.



FUNDING HISTORY

As a result of extensive collaboration on a number of International projects, I have been able to secure a number of grants from a variety of funding sources as listed in Table 1. My instrumentation development spans a large number of disciplines and has subsequently received extensive support from multiple funding agencies.



Table 1: Summary of Grants awarded, including those continuing into future fiscal years and awarded on a perpetual basis. All values are in thousands of $ [kilo-dollars (K$)], and approximations are used for future and out years. A couple of million $ in research funds have already been received.




Total

Approximate Fiscal Year

Varner

Funding Source

Funding

2006

2007

2008

2009

2010

2011

Total

US-Japan Foundation

150.0




25.0

28.4

72.8







126.2

KEK/TARGET

70.0










70.0







70.0

DOE Adv. Det. Rsch.

107.3




37.3

70.0










107.3

Linear Collider Det. R&D

73.5

23.0

22.5

28.0










73.5

Lightspin Tech

150.0




75.0

75.0










150.0

CNS/VC Rsch initiative

53.0







53.0










53.0

Univ. Wisconsin

15.0




15.0













15.0

Univ. California Irvine

9.9

9.9
















9.9

Nagoya Univ.

26.5










26.5







26.5

DOE/Argonne Natl Lab

8000.0










180.0

180.0

180.0

540.0

KEK/Belle2 Upgrade

161.0










161.0







161.0

NSF/DNDO (5 year)

5000.0










132.9

150.3

127.6

713.7

NASA ANITA-I

1191.0

119.1

119.1













238.2

NASA ANITA-II

1402.6







93.5

93.5

93.5




280.5

DOE Hawaii base grant

6772.2

165.8

165.8

165.8

179.8

179.8

179.8

1036.8

TOTAL Est.






















3601.6

These funds have supported a team of engineers, graduate students and undergraduate students that are the critical to the success of our renowned and high-impact program of Instrumentation development.




SELECTED PUBLICATIONS



Please Note: As a present and previous member of a number of very large and international experimental collaborations, in recognition of essential contributions made to the design, construction and operation of these experiments, I am author on over 600 high energy and astroparticle physics experimental papers. While without my contributions to these experiments there may never have been a paper, it is likewise obvious that I cannot have played an essential role in every paper. Therefore, please find below a select group of publications in which I have made crucial contributions. An unabridged listing of my publications may be found at the end of this document, with an indication of contribution level to each document.
J-F. Genat, G. Varner, F. Tang, H.J. Frisch, “Signal Processing for Pico-second Resolution Timing Measurements,” Nucl. Instr. Meth. A607 (2009) 387-393.
P.W. Gorham et al, (ANITA Collaboration) “New Limits on the Ultrahigh Energy Cosmic Neutrino Flux from the ANITA Experiment”, Phys. Rev. Lett. 103, 051103 (2009).
P. Allison et al, (IceRay Collaboration), “IceRay: An IceCube-centered radio Cherenkov GZK neutrino detector,” Nucl. Instr. Meth. A604 (2009) S64-S69.
G. Varner and L. Ruckman, “Sub-10ps Monolithic and Low-power Photodetector Readout,” Nucl. Instr. Meth. A602 (2009) 438-445.
H. Hoedlmoser, G. Varner and M. Cooney, “Hexagonal pixel detector with time encoded binary readout,” Nucl. Instr. Meth. A599 (2009) 152-160.
P.W. Gorham, et al., (ANITA Collaboration) “The Antarctic Impulsive Transient Antenna Ultra-high Energy Neutrino Detector Design, Performance, and Sensitivity for 2006-2007 Balloon Flight”, Astropart. Phys. 32:10-41 (2009).
J. Benitez, D.W.G.S. Leith, G. Mazaheri, B.N. Ratcliff, J. Schwiening, J. Vavra, L. Ruckman and G. Varner, “Status of the Fast Focusing DIRC (fDIRC),” Nucl. Instr. Meth. A595 (2008) 104-107.
G. Varner, L. Ruckman and A. Wong, “The First version Buffered Large Analog Bandwidth (BLAB1) ASIC for high luminosity collider and extensive radio neutrino detectors,” Nucl. Instr. Meth. A591 (2008) 534-545.
E. Martin, G. Varner, A. Koga, L. Ruckman, P. Onaka, J. Tonry and A. Lee, “High Voltage CMOS Control Interface for Astronomy-Grade Charged Coupled Devices”, Journal of Instrumentation, Volume 3, P12003 (2008).
G. Varner and L. Ruckman, “The PRO1 ASIC for Fast Wilkinson Encoding”, Journal of Instrumentation, Volume 3, P12003 (2008).
F.A. Harris, J.W. Kennedy, Q. Liu, L. Nguyen, S.L. Olsen, M. Rosen, C.P. Shen, G.S. Varner, Y.K. Heng, Z.J. Sun, K.J. Zhu, Q. An, C.Q. Feng, S.B. Liu, “BES3 time of flight monitoring system,” Nucl. Instr. Meth. A593 (2008) 255-262.
G. Varner, et al, “Large Analog Bandwidth Recorder And Digitizer with Ordered Readout (LABRADOR) ASIC,” Nucl. Instr. Meth. A583 (2007) 447-460.
G. Varner and L. Ruckman, “A Monolithic Time Stretcher for Precision Time Recording”, Journal of Instrumentation, Volume 2, P04006 (2007).
P.W. Gorham et al, (ANITA Collaboration) “Observation of the Askaryan Effect in Ice”, Phys. Rev. Lett. 99, 171101 (2007).
G. Varner, et al, “Development of the Continuous Acquisition Pixel (CAP) sensor for high luminosity lepton colliders,” Nucl. Instr. Meth. A565 (2006) 126-131.
L. Ruckman, G. Varner, S. Stanic, A. Koga and T. Tsuboyama, “Development and Implementation of a Readout Module for Radiation Sensing Field-Effect Transistors,” IEEE Trans. Nucl. Sci. 53 (2006) 2452-2455.
G.S.Varner, L.L.Ruckman, J. Schwiening, J. Vavra “Compact, low-power and precision timing photodetector readout, Proceedings of Science PD07:026 (2008).
G. Varner, “The Modern FPGA as Discriminator, TDC and ADC”, Journal of Instrumentation, Volume 1, P07001 (2006).
E. Martin, G. Varner, M. Barbero, J. Kennedy, H. Tajima and Y. Arai, “Hard X-Ray SOI Sensor Prototype”, Proceedings of the 2nd Conference on PhD Research in Microelectronics and Electronics (PRIME), pp. 417-420, Otranto (Lecce) Italy, June 12-15, 2006.
G. Varner, et al, (ANITA Collaboration) “Detection of Ultra High Energy Neutrinos via Coherent Radio Emission,” Presented at 9th International Symposium on Detector Development for Particle, Astroparticle and Synchrotron Radiation Experiments (SNIC 2006), Menlo Park, California, 3-6 April 2006, SLAC-PUB-11872, 6pp. May 2006.
S. Barwick, et al, (ANITA Collaboration) “Constraints on Cosmic Neutrino Fluxes from the Antarctic Impulsive Transient Antenna Experiment,” Phys. Rev. Lett. 96 (2006) 171101.
G. Varner, et al, “A Giga-bit Ethernet Instrument for SalSA Experiment Readout,” Nucl. Instr. Meth. A554 (2005) 437-443.
M. Barbero, G. Varner. et al, “Development of the Continuous Acquisition Pixel Detector for Super B-factory”, IEEE Trans. Nucl. Sci. 52 (2005) 1187.
G. Varner, et al, “Development of a Super B-Factory Monolithic Active Pixel Detector – the Continuous Acquisition Pixel (CAP) Prototypes,” Nucl. Instr. Meth. A541 (2005) 166-171.
G. Varner, et al., “Monolithic Multi-channel GSa/s Transient Waveform Recorder for Measuring Radio Emissions from High Energy Particle Cascades,” Proc. SPIE Int. Soc. Opt. Eng. 4858-31, 2003.
R. Milinic, et al., “Testbed for Measurments of Coherent Radio Cherenkov Emission from Cosmic Ray Induced Cascades,” Proc. SPIE Int. Soc. Opt. Eng. 4858:163-170, 2003.
R. Abe, et al., “Status of the Belle Silicon Vertex Detector,” Nucl. Instr. Meth. A478:296-298, 2002.
J.W. Nam, et al., “A Detailed Monte Carlo Simulation for the Belle TOF System,” Nucl. Instrum. Meth. A491:54-68, 2002.
J.Z. Bai, et al., “The BES Upgrade,” Nucl. Instrum. Meth. A458:627-637, 2001.
G. Varner, et al., "Silicon Pixel Detector R&D for a Beam Profile Monitor," Taipei 2000, Asian Pacific Physics Conference, APPC 2000 572-577.
G. Alimonti, et al., “The Belle Silicon Vertex Detector,” Nucl. Instrum. Meth. A453 (2000) 71-77.
H. Kichimi, G. Varner, et al., "The Belle TOF System," Nucl. Instr. Meth. A453 (2000) 315-320.
J.Z. Bai, et al., “Study of the Hadronic Decays of Chi_c States,” Phys. Rev. D60:072001, 1999.
R.M. Carey, et al., “New Measurement of the Anomalous Magnetic Moment of the Positive Muon,” Phys. Rev. Lett. 82:1632-1635, 1999.
G. Varner and Sahu, SK "Pixel Detectors in a B Factory Environment and Thoughts on Use in Belle," 2nd Workshop on Backgrounds at Machine Detector Interface 162-180, 1997.
R. Adler, et al, “First Observation of Particle – Anti-Particle Asymmetry in the Decay of Neutral Kaons into Pi0 Pi0,” Z. Phys. C70:211-218, 1996.
G. Varner, et al., “A Scintillating Fiber Hodoscope for A Bremsstrahlung Luminosity Monitor at an Electron-Positron Collider,” Rev. Sci. Instrum. 67:2780-2787, 1996.
H. Kichimi, et al., “The Cherenkov Correlated Timing Detector: Beam Test Results from Quartz and Acrylic Bars,” Nucl. Instrum. Meth. A371:91-95, 1996.
Y. Bonushkin, et al., “A UV Laser Technique for the Lorentz Effect Compensation Studies in Endcap Cathode Strip Chambers,” Nucl. Instrum. Meth. A367:311-315, 1995.
ATLAS: Technical Proposal for a General-Purpose P P Experiment at the Large Hadron Collider at CERN (MDT Muon electronics). CERN-LHCC-94-43, Dec 1994. 289pp.
G. Varner, et al., "A Deadtimeless Multihit TDC for the new g-2 Experiment," 4th International Conference on Electronics for Future Colliders 223-232, 1994.
E. Hazen, et al., “A New Multihit Digital TDC Implemented in a Gallium Arsenide ASIC,” IEEE Trans. Nucl. Sci. 41: 1125-1129, 1994.
D.H. Orlov, et al., “A Fast TDC for the CPLEAR Experiment at CERN,” Nucl. Instrum. Meth. A333:513-518, 1993.
GEM Technical Design Report (Muon System Electronics). GEM-TN-93-262, SSCL-SR-1219, Apr 1993. 628pp.

CONFERENCE PRESENTATIONS AND INVITED SYMPOSIA
Readout Electronics for the HanoHano Large Liquid Scintillation Detector. Advanced Neutrino Technology Workshop (ANT09), East-West Center, University of Hawaii, August 13, 2009.
Radio Detection of Extreme Energy Collsions. Invited Advanced Instrumentation Seminar, SLAC National Accelerator Laboratory, July 23, 2009.
Radio Detection of UHE Events. Invited Particle Astrophysics Seminar, Leung Center for Cosmology and Particle Astrophysics [LeCosPA], National Taiwan University (Taipei, Taiwan), June 18, 2009.
Radio Detection of UHE Events. Supersymmetry 2009 (SUSY09) Conference, Northeastern University (Boston), June 6, 2009.
Ultra Fast Analog and Timing CMOS Digitizers. Invited Keynote Talk, IEEE Real-Time 2009 (RT09), Institute for High Energy Physics (Beijing, China), May 11, 2009.
Radio Frequency detection of ultra-high-energy neutrinos. Invited Keynote Particle Astrophysics Talk, Technology In Particle Physics (TIPP09) Conference (Tsukuba, Japan), March 13, 2009.
Focusing DIRC with waveform digitizing electronics. Technology In Particle Physics (TIPP09) Conference (Tsukuba, Japan), March 13, 2009.
The Atmospheric Molecular Bremstrahlung Experimental Radiometer (AMBER) Project. Invited High Energy Physics Seminar, University College London (London, United Kingdom), Oct. 17, 2008.
The Second Buffered LABRADOR (BLAB2) ASIC for Precision Time Encoding. 6th International pico-second precision Timing Workshop, Institute for Nuclear Physics, University of Lyon (Lyon, France), Oct. 15, 2008.
Radio Detection of Ultra High Energy Neutrinos. Invited Physics Department Seminar, Enrico Fermi Institute, University of Chicago, Sept. 29th, 2008.
Atmospheric Molecular Bremstrahlung Detection of High Energy Cosmic Rays, Invited Colloquium, Institute for Cosmic Ray Research, University of Tokyo (Tokya, Japan), Jul. 11, 2008.
Radio Detection of Ultra High Energy Neutrinos. Invited Physics and Geophysics Colloquium, Nagoya University (Nagoya, Japan), Jul. 10, 2008.
ASICs for Frontier Discovery Research. Center for Nanofabrication and Materials, University of Barcelona Autonomia (Barcelona, Spain), May 9, 2008.
Requirements for Precision Vertex Detection at the Super-KEKB Detector. Max Planck Institute for Semiconductor Research (Munich, Germany), May 10, 2008.
ASICs for Precistion Timing Measurement. 4th International pico-second precision Timing Workshop, University of Chicago, Mar. 26, 2008.
Designing, Building, Testing and Using the LABRADOR chip. 2nd International pico-second precision Timing Workshop, University of Chicago, Dec. 17, 2007.
Vertex Detector Upgrade for SuperB. 2007 Joint BES-Belle-CLEO-Babar Workshop on Charm Physics, Institute for High Energy Physics, Beijing, China, Nov. 27th, 2007.
Radio Detection of Ultra High Energy Neutrinos. Physics Department Seminar, Institute for High Energy Physics, Beijing, China, July 18th, 2007.
ASICs for Particle and Astroparticle Physics. Invited Advanced Instrumentation Seminar, Stanford Linear Accelerator Center, Palo Alto, California, July 11th, 2007.
Compact, low-power and (deadtimeless) high timing precision photodetector readout. Photo-Detector 2007 International Conference, Kobe, Japan, June 30th, 2007.
Radio Detection of Ultra High Energy Neutrinos. Invited SLAC Experimental Seminar, Stanford Linear Accelerator Center, Palo Alto, California, March 27th, 2007.
Recording Electronics and Communications for a Large, Underwater Liquid Scintillator Neutrino Detector. Deep Ocean Anti-Neutrino Observatory Workshop, Honolulu, Hawaii, March 25th 2007.
Radio Detection of UHE Neutrinos. KEK Physics Seminar, High Energy Accelerator Research Laboratory (KEK), Tsukuba, Japan, March 12th 2007.
The Radio Technique and the Exploration of the Extreme Energy Universe. Plenary Presentation, TeV and Beyond Conference, Madison, Wisconsin, August 31st 2006.
Askaryan Under-ice Radio Array: A successor to RICE and prelude to a 10-km scale neutrino detector. Working Group Presentation on New Techniques, TeV and Beyond Conference, Madison, Wisconsin, August 30th 2006.
Messengers from the Edges of Our Universe. University Invited Lecture, Nanjing University of Information Science and Technology, Nanjing, China, July 19th 2006.
Ultimate Particle Identification Detector performance in a flavor-factory environment, Progress toward a focusing DIRC. Modern Physics Department Colloquium, University of Science and Technology of China, Hefei, China July 14th 2006.
ASICs for High-speed Transient and Position Recording, Modern Physics Department Seminar, University of Science and Technology of China, Hefei, China, July 13th 2006.
Detection of Ultra High Energy Neutrinos via Coherent Radio Emission. Stanford-Novosibirsk Instrumentation Conference (SNIC06), Palo Alto USA, April 2-6, 2006.
Radio Detection of Ultra High Energy Neutrinos: ANITA and SalSA for both Astrophysics and Particle Physics. Plenary presentation, Colliders to Cosmic Rays (C2CR) conference, Prague, Czech Republic, Sept 8-12, 2005.
Belle Pixel Detector Upgrade. Plenary presentation, PIXEL 2005 Conference, Bonn Germany, Sept. 4-7, 2005.
Belle Pixel Detector Upgrade and Relevance to ILC Vertexing. International Linear Collider Vertex Detector Working Group, Snowmass Colorado, Aug. 12-16, 2005.
Radio Detection of Ultra High Energy Neutrinos: ANITA and others. Physics Department Colloquium, University of Cincinnati, July 27th 2005.
An Introduction to Continuous Acquisition Pixel -- Monolithic Active Pixel Sensor. Linear Collider Vertex Detector Working Group, Japanese High Energy Accelerator Research Organization (KEK), Tsukuba, Japan, June 16th 2005.
Pixel Detector Upgrade Progress. 2nd International Workshop on High Luminosity B-Factory, University of Hawaii, April 20th 2005.
The Antarctic Implusive Transient Antenna (ANITA) and the search for Ultra High Energy neutrinos. Physics Department Colloquium, at the High Energy Accelerator Research Organization (KEK), Tsukuba Japan, March 25th 2005.
Salt dome Shower Array (SalSA) Instrumentation. Symposium on Use of Salt Formations for Ultra High Energy neutrino detection, Stanford Linear Accelerator Center, February 2005.
The Antarctic Implusive Transient Antenna (ANITA). Physics Department Seminar, University of Kansas, December 2nd 2004.
ANITA & ANITA-lite: A Pathfinding Long-Duration Balloon Mission to Constrain the Origin of the Highest Energy Cosmic Rays, Astrophysics and Cosmology Seminar, University of Minnesota, November 2004.
Discoveries Big and Small. Physics Department Colloquium, University of Hawaii, November 2004
Particle Astrophysics Initiatives: ANITA and others. Physics Department Colloquium, University of Canterbury, June 25th 2004
Silicon at Belle and Super Belle. Inaugural Australia-New Zealand Silicon Detector Symposium, New Zealand Royal Society, Wellington New Zealand, June 21st 2004



Monolithic Active Pixel Sensors: Recent Progress. 5th International Solid-state Detector (“Hiroshima”) Symposium, June 2004
The ANITA project and Belle vertex upgrades. Princeton University High Energy Physics seminar, March 2004.
Initiatives in Ultra-High Energy neutrino detection: ANITA and SalSA. Boston University High Energy Physics Seminar, February 2004.
Belle Monolithic Thin Pixel Upgrade. Super B Factory Workshop in Hawaii, January 2004.
Pipelined Readout for Super-Belle. Super B Factory Workshop in Hawaii, January 2004.
Precision Timing and Continuous Acquisition Pixels. Trigger and Data Acquisition Workshop, Nara University, November 2003.
Precision Timing: Monolithic Time Stretcher and High-Speed Sampling. 5th Workshop on Higher Luminosity B Factory, Izu Japan, August 25, 2003.
New Initiatives in Ultra-High Energy neutrino detection. Institute for High Energy Physics Seminar, Beijing P.R.C., March 2003.
Advanced Instrumentation Techniques: High-performance Timing, Sampling and Particle Identification. University of Science and Technology of China (USTC) Special Seminar, Hefei, Anhui P.R.C., March 2003.
The Antarctic Impulsive Transient Antenna: a Detector for Ultra-High Energy neutrinos. Paul-Scherrer Institute Seminar, Villigen Switzerland, November 2002.
Common Pipelined Platform for Electronics Readout (COPPER), Front-end Instrumentation Entity for Subdetector Specific Electronics (FINESSE) and custom timing and sampling ASICS. Trigger and Data Acquisition Workshop, Osaka City University, October 2002.
The Self-Triggered Recorder for Analog Waveforms (STRAW). SPIE Meeting, Waikaloa Hawaii, August 2002.
A Monolithic Time Stretcher for Large System Precision Timing. 4th Workshop on Higher Luminosity B Factory, Kanagawa Japan, August 2002.



High Precision Time-Of-Flight: Belle Experience and Future R&D. BESIII Workshop, Institute of High Energy Physics, Beijing P.R.C., June 25th 2002.
A Pair Loss Monitor for Luminosity Monitoring of a Future Linear Collider Detector. Asian Pacific Particle Conference, National Taiwan University, Taipei Taiwan, August 2000.
The Background Exorcism for A Stable Belle (BEAST) Experiment: Results and Lessons. Workshop on B Factory backgrounds, Tsukuba Japan, November 1999.
Intermediate Resonances in Hadronic Decays of the Chi(c) States. Institute for High Energy Physics High Energy Physics Seminar, Beijing P.R.C., May 1999.
Initial Performance Results of the Belle Time-of-Flight System. Beijing Experimental Spectrometer Upgrade Working Group, Beijing P.R.C., May 1999.
Data Concentration and Sparsification for the Compact Muon Solenoid (CMS) Subdetector Systems. Joint LHC Trigger and Data Acquisition Workshop, CERN, Geneva Switzerland, April 1998.
Design Performance and Queuing Simulation of the Compact Muon Solenoid (CMS) Electromagnetic Calorimeter (ECAL) Data Concentrator. LHC Electronics Review, ETH Zurich, Zurich Switzerland, October 1997.
A Time Expanding Multihit TDC for the Belle TOF Detector at the KEK B-Factory. Sixth International Conference on Electronics for Particle Physics, Chestnut Ridge New York, May 1997.
Pixel Detectors in a B-Factory Environment and thoughts on use in Belle. 2nd Workshop on Backgrounds at the Machine Detector Interface, Honolulu Hawaii, March 1997.
Thoughts on a 50ps Time-of-Flight System. Beijing Tau-Charm Factory Workshop, Beijing P.R.C., February 1996.
A FASTBUS Readout System for the Belle Time-of-Flight Detector. Particle Identification Workshop, Okayama University, Okayama Japan, July 1995.
Simulation and Test Results of the ATLAS Modified Drift Tube (MDT) Performance. LHC Electronics Review, NIKHEF, Amsterdam Netherlands, December 1994.

A New Multihit Digital TDC Implemented in a Gallium Arsenide ASIC. IEEE Nuclear Science Symposium, San Francisco California, November 1994.



A Deadtimeless Multihit TDC for the new g-2 Experiment. 4th International Conference on Electronics for Future Colliders, Chestnut Ridge New York, May 1994.

EXPERT REVIEW PANELS

Concept Study: Radio Detection Augmentation for the IceCube Detector Array at the South Pole, IceCube Headquarters, Madison WI, April 20-22, 2006.


Technology Assessment Review: Prospects for extreme sub-micron pipelined pixel readout electronics, Fermi National Accelerator Laboratory, Chicago IL, July 28th, 2005.
Concept Design Review: Imaging Hard X-Ray Compton Polarimeter, Tokyo Japan, June 2005.
Technology Assessment Review: fully depleted SOI as a pixel sensor technology for International Linear Collider Vertex Detector, Japanese Institute for High Energy Accelerator Research (KEK), June 2005.
Technology Assessment Review: CMOS image sensors for future vertex detectors, Fermilab, December 2004.
Critical Design Review: Radio Ice Cherenkov Experiment (RICE) version 2 readout instrumentation, University of Kansas, December 2004.

Preliminary Design Review: an ASIC Upgrade to the Super-Kamiokande ATM TKO Readout System, Boston University, February 2004.


Critical Design Review: the LABRADOR and DRS2 ASICS. Copthorne Hotel, London England, July 2003.
Performance Review on Using the APV25 ASIC for the Belle SVD3 Vertex Detector, Imperial College, London England, June 2003.
Critical Design Review: the Domino Ring Sampler (DRS) ASIC, Paul-Scherrer Institute, Villigen Switzerland, November 2002.
BESIII Time of Flight Design Review, Institute for High Energy Physics, Beijing P.R.C., June 2002.
Critical Design Review of the Belle Silicon Vertex Detector (SVD2) Readout and Power Supply System, Institute for Nuclear and Particle Physics, Krakow Poland, January 2000.
Design Performance of the Viking Architecture (VA-2) chip in the AMS 0.35um process and Radiation Hardness Issues, IDE AS, Oslo Norway, January 2000.
Preliminary Design Review of the BES Upgrade pipeline electronics and TOF Readout, Institute for High Energy Physics, Beijing P.R.C., May 1999.
Design Review of a Radiation Tolerant Viking Architecture (VA) silicon strip readout ASIC in the AMS 0.8um process, IDE AS, Oslo Norway, August 1998.

Selected Patent Disclosures

"A Monolithic Charge Integrating Wavefront Sensor Readout", patent rights held AOptix Tech

"An Integrated Charge Pump HV Bi-morph Mirror Driver", patent rights held AOptix Tech

PUBLICATION REVIEW ACTIVITIES





  • Evaluated 10 Abstracts and evaluated suitability for Oral presentation at the 2006 IEEE Nuclear Science Symposium, October 2006.




  • 2 articles for NIM proceedings submission for the Pixel 2005 (Bonn, Germany) Symposium, September 2005.



  • 2 articles for NIM proceedings submission for the 5th Solid-state Tracking Detector (Hiroshima) Symposium, June 2004.




  • 2 accepted papers (PLB and PRD), and 2 papers currently in review for the Belle experiment, including diverse topics: charmed baryons and leptonic B decays




  • 2 papers (accepted by NIM) for the Vertex 2003 Conference held in Kona, Hawaii




  • more than 20 papers on the BES experiment, including very difficult and controversial partial wave analyses of the low mass Sigma(500) resonance


PROFESSIONAL SERVICE ACTIVITIES

Given expertise in electronics and system design, have been asked to review proposals to the DOE Advanced Detector Research and Small Business Innovation in Research programs.


IEEE Nuclear Science Symposium Session Convener and Chairman
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