John Orrell Physics - Nuclear & Particle
Curriculum Vitae
Education
University of Washington, Seattle, WA
- Doctor of Philosophy, Experimental Nuclear Physics (March 2004)
A Search for an Electron Antineutrino Signal in the Sudbury Neutrino Observatory (ps,pdf)
- Master of Science, Physics (August 2001)
Rensselaer Polytechnic Institute, Troy, NY
- Bachelor of Science, cum laude, Physics (August 1998)
- Bachelor of Science, cum laude, Philosophy (August 1998)
Research Interests
- National security applications of nuclear science
- Neutrino properties
- Dark matter
Experience
Research Scientist, Pacific Northwest National Laboratory, Richland, WA (6/06-current)
- Searching for dark matter using a germanium gamma-ray spectrometer at Soudan Underground Laboratory.
- Process Quality Assurance Lead for the Majorana DEMONSTRATOR experiment.
- Development of an 37Ar measurement system for application to On-Site Inspection under CTBT.
- Effort to measure antineutrino-nucleus coherent scattering to enable a new method to monitor reactor fuel burn-up.
- Instrumentation of a multi-crystal array of high purity germanium detectors.
- Demonstrating a lab-scale liquid argon based Compton-suppression system for HPGe gamma-ray spectrometers.
- Responsible for integrating a beta sensitive environmental monitor into field operations.
Postdoctoral Fellow, Pacific Northwest National Laboratory, Richland, WA (4/04 - 6/06)
- Alternative cooling scheme investigation for the Majorana Project: Exposed germanium crystals in liquid argon.
- Developed & performed optimization tests of a scintillating optical fiber, beta detector designed for environmental monitoring.
- Investigated the radial position dependence of a parametric pulse shape analysis for high purity germanium gamma-ray spectrometers.
Teaching Assistant, University of Washington, Seattle, WA (10/98 - 12/98)
- Taught two sections of the introductory classical mechanics laboratory.
- Assistant in two sections of the introductory classical mechanics tutorial.
Research Intern, Argonne National Laboratory, Chicago, IL (5/98 - 8/98)
- Studied electron response of the HERMES Cherenkov for electron/pion separation.
- Wrote report on the response of the HERMES Cherenkov for ANL.
Research Intern, Argonne National Laboratory, Chicago, IL (5/97 - 8/97)
- Authored programs to analyze and correct the HERMES Cherenkov counter's response to electrons as a function of track position and time.
- Wrote simulation of the photomultiplier tube light acceptance efficiency for a proposed HERMES Ring Imaging Cherenkov counter.
Lab Technician, Thomas Jefferson National Accelerator Facility, Newport News, VA (8/96)
- Installed and aligned mirrors in the CLAS Collaboration Cherenkov detectors.
- Detected and repaired gas & light leaks in completed Cherenkov detectors.
Lab Technician, Photomultiplier Test Lab, Rensselaer Polytechnic Institute, Troy, NY (9/95 - 7/96)
- Tested 5" photomultiplier tubes for the CLAS Collaboration Cherenkov detectors.
- Analyzed test results to obtain relative efficiency and dark noise at a specified gain.
- Trained other students in testing procedures.
Honors, Awards and Leadership Positions
Elected to Secretary/Treasurer for the Northwest Section of the American Physical Society (APS) (2011-2014).
Elected to Member-at-Large for the Northwest Section of the American Physical Society (APS) (2007-2011).
Appointed as the 2006 Chairperson of the APS Committee on Careers and Professional Development.
Appointed to the APS Committee on Careers and Professional Development (2004-2007).
Visiting Scholar at the University of Washington, March 2004 - July 2005.
Two Best Graduate Student Talk awards at annual meetings of the Northwest Section of APS:
- 2002 - High Energy Physics Session, May 17 - 18, Banff, Alberta.
- 2001 - Nuclear Physics Session, May 25 - 26, Seattle, WA.
Scholarship to attend the Twelfth National Nuclear Physics Summer School at the University of California, Santa Cruz, July 3 - 14, 2000.
Initiate of the National Order of Omega, the Greek Leadership Honor Society.
Gamma Tau Chapter of the Pi Kappa Alpha Fraternity
- President - Fall Semester, 1997.
- Internal Vice President - String Semester, 1997.
- Treasurer (Managed $160,000 annual dues based budget) - Spring and Fall Semesters, 1996.
Dean's List all 8 semesters while attending Rensselaer Polytechnic Institute (RPI).
Professional Affiliations
Publications
Most recent from inSPIRE
C.E. Aalseth et al., Phys. Rev. Lett. 107 (2011) 141301.
Search for an Annual Modulation in a P-type Point Contact Germanium Dark Matter Detector |
C.E. Aalseth et al., Nucl. Instrum. Methods A 652 (2011) 58-61.
Measurement of 37Ar to support technology for On-site Inspection under the Comprehensive Nuclear-Test-Ban Treaty |
C.E. Aalseth et al., Nucl. Instrum. Methods A 652 (2011) 692-695.
Astroparticle Physics with a Customized Low-Background Broad Energy Germanium Detector |
C.E. Aalseth et al., Phys. Rev. Lett. 106 (2011) 131301.
Results from a Search for Light-Mass Dark Matter with a P-type Point Contact Germanium Detector |
C.E. Aalseth et al., Phys. Rev. Lett. 101 (2008) 055502. Errata: Phys. Rev. Lett. 102 (2009) 109903.
Experimental Constraints on a Dark Matter Origin for the DAMA Annual Modulation Effect |
R. Suarez et al., Nucl. Instrum. Methods A 586 (2008) 276-285.
Real-time digital signal-processor implementation of self-calibrating pulse-shape discriminator for high-purity germanium |
B. Aharmim et al., Phys. Rev. C 75 (2007) 045502.
Determination of the νe and total 8B solar neutrino fluxes using the Sudbury Neutrino Observatory Phase I data set |
J.L. Orrell et al., Nucl. Instrum. Methods A 579 (2007) 91-93.
Operation of a high-purity germanium crystal in liquid argon as a Compton-suppressed radiation spectrometer |
B. Aharmim et al., Phys. Rev. C 72 (2005) 055502.
Electron energy spectra, fluxes, and day-night asymmetries of 8B solar neutrinos from measurements with NaCl dissolved in the heavy-water detector at the Sudbury Neutrino Observatory |
C.E. Aalseth et al., Nucl. Phys. Proc. Suppl. 138 (2005) 217-220.
The proposed Majorana 76Ge double-beta decay experiment |
B. Aharmim et al., Phys. Rev. D 72 (2005) 052010.
Search for Periodicities in the 8B Solar Neutrino Flux Measured by the Sudbury Neutrino Observatory |
B. Aharmim et al., Phys. Rev. D 70 (2004) 093014.
Electron Antineutrino Search at the Sudbury Neutrino Observatory |
S. N. Ahmed et al., Phys. Rev. Lett. 92 (2004) 181301.
Measurement of the Total Active 8B Solar Neutrino Flux at the Sudbury Neutrino Observatory with Enhanced Neutral Current Sensitivity |
S. N. Ahmed et al., Phys. Rev. Lett. 92 (2004) 102004.
Constraints on Nucleon Decay via Invisible Modes from the Sudbury Neutrino Observatory |
Q.R. Ahmad et al., Phys. Rev. Lett. 89 (2002) 011302.
Measurement of Day and Night Neutrino Energy Spectra at SNO and Constraints on Neutrino Mixing Parameters |
Q.R. Ahmad et al., Phys. Rev. Lett. 89 (2002) 011301.
Direct Evidence for Neutrino Flavor Transformation from Neutral-Current Interactions in the Sudbury Neutrino Observatory |
Q.R. Ahmad et al., Phys. Rev. Lett. 87 (2001) 071301.
Measurement of the Rate of νe + d → p + p + e- Interactions Produced by 8B Solar Neutrinos at the Sudbury Neutrino Observatory |
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