Publications

Publications while at Marquette:

1.

J. Schaefer, T. Tharp, & D. Nowacek (2021).
Addressing Human-Induced Climate Change from an Ignatian Perspective.
In S. D. Trolio (Ed.), Best Practices in Jesuit Higher Education: Vol. 1 (1st ed., pp. 18–34). International Association of Jesuit Universities.
PDF, link

2.

The ALPHA Collaboration (C. J. Baker et. al.). (2021).
Laser cooling of antihydrogen atoms,
Nature, Vol. 592 (p. 35-42).
PDF, link

3.

The ALPHA Collaboration (M. Ahmadi, et. al.). (2020).
Investigation of the fine structure of antihydrogen,
Nature, Vol. 578 (p. 375–380).
PDF, link

4.

The ALPHA Collaboration (M. Ahmadi, et. al.). (2018).
Observation of the 1S–2P Lyman-α transition in antihydrogen,
Nature, Vol. 561 (pp. 211–215).
PDF, link

5.

The ALPHA Collaboration (M. Ahmadi, et. al.). (2018).
Characterization of the 1S-2S transition in antihydrogen,
Nature, Vol. 557 (p. 71).
PDF, link

6.

The ALPHA Collaboration (M. Ahmadi, et. al.). (2018).
Enhanced Control and Reproducibility of Non-Neutral Plasmas,
Phys. Rev. Lett., Vol. 120 (2nd ed., p. 025001).
PDF, link

7.

The ALPHA Collaboration (M. Ahmadi, et. al.). (2017).
Antihydrogen accumulation for fundamental symmetry tests
Nature Commun. Vol. 8 (1st ed., p. 681).
PDF, link

8.

The ALPHA Collaboration (M. Ahmadi, et. al.). (2017).
Observation of the hyperfine spectrum of antihydrogen,
Nature, Vol. 548 (pp. 66–69).
PDF, link

9.

A. Capra, et. al. (2016).
Limit on the electric charge of antihydrogen,
Proceedings, 6th International Symposium on Symmetries in Subatomic Physics (SSP 2015): Victoria, BC, Canada, June 8-12, 2015: Hyperfine Interact., Vol. 238 (1st ed., p. 9).
PDF, link

10.

The ALPHA Collaboration (M. Ahmadi, et. al.). (2016).
Observation of the 1S-2S transition in trapped antihydrogen,
Nature, Vol. 541 (pp. 506–510).
PDF, link

Patent application:

11.

Tharp, T.
Systems and Components for Anchoring Objects to Rack Mount Systems and Assemblies,
Patent Application, (2018).
PDF, link

Publications previous to Marquette:

12.

D. M. Silveira, et. al. (2016, August).
Fundamental Tests of Physics with Antihydrogen at ALPHA,
Proceedings, OSA Latin America Optics and Photonics Conference (LAOP 2016): Medellin, Colombia, August 22-26, 2016.
(PDF not available), link

13.

The ALPHA Collaboration (M. Ahmadi, et. al.). (2016).
An improved limit on the charge of antihydrogen from stochastic acceleration
Nature, Vol. 529 (pp. 373–376).
PDF, link

14.

A. Gutierrez, et. al. (2015).
Antiproton cloud compression in the ALPHA apparatus at CERN
In Proceedings, 6th International Conference on Trapped Charged Particles and Fundamental Physics (TCP2014): Takamatsu, Japan, November 28 - December 5, 2014. Hyperfine Interact., Vol. 235 (1-3rd ed., pp. 21–28).
(PDF not available), link

15.

The ALPHA Collaboration (C. Amole, et. al.). (2014).
An experimental limit on the charge of antihydrogen
Nature Commun., Vol. 5 (p. 3955).
PDF, link

16.

Dorfman, S., Ji, H., Yamada, M., Yoo, J., Lawrence, E., Myers, C., & Tharp, T. (2014).
Experimental observation of 3-D, impulsive reconnection events in a laboratory plasma
Physics of Plasmas, Vol. 21 (1st ed., p. 012109).
PDF, link

17.

The ALPHA Collaboration (C. Amole, et. al.). (2014).
In situ electromagnetic field diagnostics with an electron plasma in a Penning-Malmberg trap
New J. Phys., Vol. 16 (1st ed., p. 013037).
PDF, link

18.

The ALPHA Collaboration (C. Amole, et. al.).
Silicon vertex detector upgrade in the ALPHA experiment.
In Proceedings, 13th Vienna Conference on Instrumentation (VCI 2013): Vienna, Austria, February 11-15, 2013. Nucl. Instrum. Meth., Vol. A732 (pp. 134–136).
PDF, link

19.

Tharp, T., Yamada, M., Ji, H., Lawrence, E., Dorfman, S., Myers, C., Yoo, J., Huang, Y., & Bhattacharjee, A. (2013).
Study of the effects of guide field on Hall reconnection
Physics of Plasmas, Vol. 20 (p. 055705).
PDF link

20.

Dorfman, S., Ji, H., Yamada, M., Yoo, J., Lawrence, E., Myers, C., & Tharp, T. D. (2013).
Three-dimensional, impulsive magnetic reconnection in a laboratory plasma,
Geophysical Research Letters, Vol. 40 (2nd ed., pp. 233–238).
PDF link

21.

Tharp, T., Yamada, M., Ji, H., Lawrence, E., Dorfman, S., Myers, C. E., & Yoo, J. (2012).
Quantitative Study of Guide-Field Effects on Hall Reconnection in a Laboratory Plasma,
Phys. Rev. Lett., Vol. 109 (p. 165002).
PDF link

22.

Tharp, T., Almagri, A. F., Miller, M. C., Mirnov, V. V., Prager, S. C., Sarff, J. S., & Kim, C. C. (2010).
Measurements of impulsive reconnection driven by nonlinear Hall dynamics
Physics of Plasmas, Vol. 17 (p. 120701).
PDF link

23.

D. Den Hartog, et. al. (2007).
Recent improvements in confinement and beta in the MST reversed-field pinch
Nuclear Fusion, Vol. 47 (9th ed., p. L17).
PDF, link

Publications in Preparation:

1.

The ALPHA Collaboration (C. J. Baker et. al.). The ALPHA-2 apparatus - facilitating experimentation with trapped antihydrogen,
Expected submission in 2021 or 2022 to Nuclear Instruments and Methods in Physics Research.

•  This paper reports the technical design of the hardware of ALPHA-2. I am the internal editor of this paper, responsible for collecting contributions and writing the manuscript. In addition, I built a significant portion of the ALPHA-2 apparatus that is described in this paper.

2.

T. D. Tharp, C. J. Baker, S. Cieslicki, E. Corr, Mia Ketelhohn, D. Loos, Vacuum Compatibility Measurements of Unbaked 3D Printed Metals and Ceramic
Expected submission in 2021 to Journal of Vacuum Science & Technology.

•  This reports the local work on outgassing measurements at Marquette. I was responsible for this scientific investigation and am writing the paper.

3.

The ALPHA Collaboration (C. J. Baker et. al.). A Novel Multi-species Beamline for the ALPHA Antihydrogen Experiment, Physical Review Accelerators and Beams,
Expected submission July 2021.

•  I contributed an analytic analysis resulting in Equation 5, and I contributed the hardware featured in Figure 6.