Christopher Walter, Professor and Interim Associate Chair  

Christopher Walter

Office Location: Box 90305 Physics Department, Duke University, Durham, NC 27708
Office Phone: (919) 660-2535
Email Address: chris.walter@duke.edu
Web Page: http://www.phy.duke.edu/~cwalter/

Specialties:
Experimental high energy physics

Education:
Ph.D., California Institute of Technology, 1997
M.S., California Institute of Technology, 1991
B.A., University of California - Santa Cruz, 1989

Research Categories: Experimental Particle Physics, Neutrino Physics, Particle-Astrophysics, Observational Cosmology

Current projects: The Super-Kamiokande Experiment, The T2K Experiment, The Hyper-Kamiokande Experiment, The LSST Dark Energy Science Collaboration

Areas of Interest:
Experimental Particle Physics
Neutrino Physics
Particle-Astrophysics
Observational Cosmology

Recent Publications   (More Publications)

  1. Orii, A; Abe, K; Bronner, C; Hayato, Y; Ikeda, M; Imaizumi, S; Ito, H; Kameda, J; Kataoka, Y; Kato, Y; Kishimoto, Y; Miura, M; Moriyama, S; Mochizuki, T; Nagao, Y; Nakahata, M; Nakajima, Y; Nakayama, S; Okada, T; Okamoto, K; Pronost, G; Sekiya, H; Shiozawa, M; Sonoda, Y; Suzuki, Y; Takeda, A; Takemoto, Y; Takenaka, A; Tanaka, H; Yano, T; Han, S; Kajita, T; Okumura, K; Tashiro, T; Wang, R; Xia, J; Megias, GD; Bravo-Berguño, D; Labarga, L; Marti, L; Zaldivar, B; Blaszczyk, FDM; Kearns, E; Raaf, JL; Stone, JL; Wan, L; Wester, T; Pointon, BW; Bian, J; Griskevich, NJ; Kropp, WR; Locke, S; Mine, S; Smy, MB; Sobel, HW; Takhistov, V; Weatherly, P; Ganezer, KS; Hill, J; Kim, JY; Lim, IT; Park, RG; Bodur, B; Scholberg, K; Walter, CW; Bernard, L; Coffani, A; Drapier, O; El Hedri, S; Giampaolo, A; Gonin, M; Mueller, TA; Paganini, P; Quilain, B; Ishizuka, T; Nakamura, T; Jang, JS; Learned, JG; Matsuno, S; Anthony, LHV; Litchfield, RP; Sztuc, AA; Uchida, Y; Berardi, V; Catanesi, MG; Radicioni, E; Calabria, NF; Machado, LN; De Rosa, G; Collazuol, G; Iacob, F; Lamoureux, M; Ospina, N; Ludovici, L; Nishimura, Y; Cao, S; Friend, M; Hasegawa, T; Ishida, T; Kobayashi, T, Search for tens of MeV neutrinos associated with gamma-ray bursts in Super-Kamiokande, Progress of Theoretical and Experimental Physics, vol. 2021 no. 10 (October, 2021) [doi]  [abs].
  2. Abe, K; Bronner, C; Hayato, Y; Ikeda, M; Imaizumi, S; Kameda, J; Kanemura, Y; Kataoka, Y; Miki, S; Miura, M; Moriyama, S; Nagao, Y; Nakahata, M; Nakayama, S; Okada, T; Okamoto, K; Orii, A; Pronost, G; Sekiya, H; Shiozawa, M; Sonoda, Y; Suzuki, Y; Takeda, A; Takemoto, Y; Takenaka, A; Tanaka, H; Watanabe, S; Yano, T; Han, S; Kajita, T; Okumura, K; Tashiro, T; Wang, R; Xia, J; Megias, GD; Bravo-Berguño, D; Labarga, L; Marti, L; Zaldivar, B; Pointon, BW; Blaszczyk, FDM; Kearns, E; Raaf, JL; Stone, JL; Wan, L; Wester, T; Bian, J; Griskevich, NJ; Kropp, WR; Locke, S; Mine, S; Smy, MB; Sobel, HW; Takhistov, V; Weatherly, P; Hill, J; Kim, JY; Lim, IT; Park, RG; Bodur, B; Scholberg, K; Walter, CW; Bernard, L; Coffani, A; Drapier, O; El Hedri, S; Giampaolo, A; Gonin, M; Mueller, TA; Paganini, P; Quilain, B; Ishizuka, T; Nakamura, T; Jang, JS; Learned, JG; Anthony, LHV; Martin, DGR; Sztuc, AA; Uchida, Y; Berardi, V; Catanesi, MG; Radicioni, E; Calabria, NF; Machado, LN; de Rosa, G; Collazuol, G; Iacob, F; Lamoureux, M; Ospina, N; Ludovici, L; Maekawa, Y; Nishimura, Y; Cao, S; Friend, M; Hasegawa, T; Ishida, T; Jakkapu, M; Kobayashi, T; Matsubara, T; Nakadaira, T, Search for neutrinos in coincidence with gravitational wave events from the LIGO–Virgo O3a observing run with the Super-Kamiokande detector, The Astrophysical Journal, vol. 918 no. 2 (September, 2021), pp. 78-78, American Astronomical Society [doi]  [abs].
  3. Collaboration, S-K; Abe, K; Bronner, C; Hayato, Y; Ikeda, M; Imaizumi, S; Ito, H; Kameda, J; Kataoka, Y; Miura, M; Moriyama, S; Nagao, Y; Nakahata, M; Nakajima, Y; Nakayama, S; Okada, T; Okamoto, K; Orii, A; Pronost, G; Sekiya, H; Shiozawa, M; Sonoda, Y; Suzuki, Y; Takeda, A; Takemoto, Y; Takenaka, A; Tanaka, H; Yano, T; Akutsu, R; Han, S; Kajita, T; Okumura, K; Tashiro, T; Wang, R; Xia, J; Bravo-Berguño, D; Labarga, L; Marti, L; Zaldivar, B; Blaszczyk, FDM; Kearns, E; Raaf, JL; Stone, JL; Wan, L; Wester, T; Pointin, BW; Bian, J; Griskevich, NJ; Kropp, WR; Locke, S; Mine, S; Smy, MB; Sobel, HW; Takhistov, V; Weatherly, P; Hill, J; Kim, JY; Lim, IT; Park, RG; Bodur, B; Scholberg, K; Walter, CW; Bernard, L; Coffani, A; Drapier, O; Hedri, SE; Giampaolo, A; Gonin, M; Mueller, TA; Paganini, P; Quilain, B; Ishizuka, T; Nakamura, T; Jang, JS; Learned, JG; Anthony, LHV; Sztuc, AA; Uchida, Y; Berardi, V; Catanesi, MG; Radicioni, E; Calabria, NF; Machado, LN; Rosa, GD; Collazuol, G; Iacob, F; Lamoureux, M; Ospina, N; Ludovici, L; Nishimura, Y; Cao, S; Friend, M; Hasegawa, T; Ishida, T; Jakkapu, M; Kobayashi, T; Matsubara, T; Nakadaira, T; Nakamura, K; Oyama, Y; Sakashita, K; Sekiguchi, T; Tsukamoto, T; Nakano, Y; Shiozawa, T; Suzuki, AT; Takeuchi, Y; Yamamoto, S; Ali, A; Ashida, Y; Feng, J; Hirota, S; Ichikawa, AK; Kikawa, T; Mori, M; Nakaya, T; Wendell, RA; Yasutome, Y; Fernandez, P; McCauley, N; Mehta, P; Pritchard, A; Tsui, KM; Fukuda, Y; Itow, Y; Menjo, H; Niwa, T; Sato, K; Tsukada, M; Mijakowski, P; Jung, CK; Vilela, C; Wilking, MJ; Yanagisawa, C; Harada, M; Hagiwara, K; Horai, T; Ishino, H; Ito, S; Koshio, Y; Ma, W; Piplani, N; Sakai, S; Kuno, Y; Barr, G; Barrow, D; Cook, L; Goldsack, A; Samani, S; Simpson, C; Wark, D; Nova, F; Boschi, T; Lodovico, FD; Taani, M; Migenda, J; Sedgwick, SM; Zsoldos, S; Yang, JY; Jenkins, SJ; Malek, M; McElwee, JM; Stone, O; Thiesse, MD; Thompson, LF; Okazawa, H; Kim, SB; Yu, I; Nishijima, K; Koshiba, M; Iwamoto, K; Ogawa, N; Yokoyama, M; Martens, K; Vagins, MR; Izumiyama, S; Kuze, M; Tanaka, M; Yoshida, T; Inomoto, M; Ishitsuka, M; Matsumoto, R; Ohta, K; Shinoki, M; Martin, JF; Tanaka, HA; Towstego, T; Hartz, M; Konaka, A; Perio, PD; Prouse, NW; Chen, S; Xu, BD; Richards, B; Jamieson, B; Walker, J; Minamino, A; Pintaudi, G; Sasaki, R; Posiadala-Zezula, M, Search for solar electron anti-neutrinos due to spin-flavor precession in the Sun with Super-Kamiokande-IV (December, 2020)  [abs].
  4. Collaboration, S-K; Abe, K; Bronner, C; Hayato, Y; Ikeda, M; Imaizumi, S; Ito, H; Kameda, J; Kataoka, Y; Miura, M; Moriyama, S; Nagao, Y; Nakahata, M; Nakajima, Y; Nakayama, S; Okada, T; Okamoto, K; Orii, A; Pronost, G; Sekiya, H; Shiozawa, M; Sonoda, Y; Suzuki, Y; Takeda, A; Takemoto, Y; Takenaka, A; Tanaka, H; Yano, T; Akutsu, R; Han, S; Kajita, T; Okumura, K; Tashiro, T; Wang, R; Xia, J; Bravo-Berguño, D; Labarga, L; Marti, L; Zaldivar, B; Blaszczyk, FDM; Kearns, E; Gustafson, JD; Raaf, JL; Stone, JL; Wan, L; Wester, T; Bian, J; Griskevich, NJ; Kropp, WR; Locke, S; Mine, S; Smy, MB; Sobel, HW; Takhistov, V; Weatherly, P; Hill, J; Kim, JY; Lim, IT; Park, RG; Bodur, B; Scholberg, K; Walter, CW; Coffani, A; Drapier, O; Hedri, SE; Giampaolo, A; Gonin, M; Mueller, TA; Paganini, P; Quilain, B; Ishizuka, T; Nakamura, T; Jang, JS; Learned, JG; Anthony, LHV; Sztuc, AA; Uchida, Y; Berardi, V; Catanesi, MG; Radicioni, E; Calabria, NF; Machado, LN; Rosa, GD; Collazuol, G; Iacob, F; Lamoureux, M; Ospina, N; Ludovici, L; Nishimura, Y; Cao, S; Friend, M; Hasegawa, T; Ishida, T; Kobayashi, T; Matsubara, T; Nakadaira, T; Jakkapu, M; Nakamura, K; Oyama, Y; Sakashita, K; Sekiguchi, T; Tsukamoto, T; Nakano, Y; Shiozawa, T; Suzuki, AT; Takeuchi, Y; Yamamoto, S; Ali, A; Ashida, Y; Feng, J; Hirota, S; Ichikawa, AK; Kikawa, T; Mori, M; Nakaya, T; Wendell, RA; Yasutome, K; Fernandez, P; McCauley, N; Mehta, P; Pritchard, A; Tsui, KM; Fukuda, Y; Itow, Y; Menjo, H; Niwa, T; Sato, K; Tsukada, M; Mijakowski, P; Posiadala-Zezula, M; Jung, CK; Vilela, C; Wilking, MJ; Yanagisawa, C; Harada, M; Hagiwara, K; Horai, T; Ishino, H; Ito, S; Koshio, Y; Ma, W; Piplani, N; Sakai, S; Kuno, Y; Barr, G; Barrow, D; Cook, L; Goldsack, A; Samani, S; Simpson, C; Wark, D; Nova, F; Boschi, T; Lodovico, FD; Sedgwick, SM; Taani, M; Zsoldos, S; Yang, JY; Jenkins, SJ; McElwee, JM; Thiesse, MD; Thompson, LF; Malek, M; Stone, O; Okazawa, H; Kim, SB; Yu, I; Nishijima, K; Koshiba, M; Ogawa, N; Iwamoto, K; Yokoyama, M; Martens, K; Vagins, MR; Kuze, M; Izumiyama, S; Tanaka, M; Yoshida, T; Inomoto, M; Ishitsuka, M; Matsumoto, R; Ohta, K; Shinoki, M; Martin, JF; Tanaka, HA; Towstego, T; Hartz, M; Konaka, A; Perio, PD; Prouse, NW; Pointon, BW; Chen, S; Xu, BD; Richards, B; Jamieson, B; Walker, J; Minamino, A; Pintaudi, G; Sasaki, R, Neutron-Antineutron Oscillation Search using a 0.37 Megaton$\cdot$Year Exposure of Super-Kamiokande (December, 2020)  [abs].
  5. Amon, A; Bechtol, K; Connolly, AJ; Digel, SW; Drlica-Wagner, A; Gawiser, E; Jarvis, M; Jha, SW; Linden, AVD; Moniez, M; Narayan, G; Regnault, N; Sevilla-Noarbe, I; Schmidt, SJ; Suyu, SH; Walter, CW, Recommended Target Fields for Commissioning the Vera C. Rubin Observatory (October, 2020) (I led a two year effort across the DESC to produce this note detailing suggested fields for observation in the Rubin Obs. It is now being used by the other science collaborations and the Rubin Obs.)  [abs].

Highlight:
I am a professor in the physics department studying particle physics and cosmology. I try to understand both the nature of the ghostly particles called neutrinos in giant detectors deep underground, and why the expansion of the universe is accelerating using telescopes on top of mountains.   My background and training is originally in particle physics and I was part of the team that showed the sub-atomic particles called neutrinos have mass.  The leader of our team, T. Kajita was co-awarded the 2015 Nobel Prize in Physics for this discovery which cited the work of our collaboration.   I also began the effort in observational cosmology at Duke, joining the Vera C. Rubin Observatory, a giant telescope under construction in Chile designed to make a 10 year, three dimensional survey of the entire visible sky. Using the Rubin Observatory, we will focus on examining billions of galaxies, along with supernovae and other astronomical probes to try to determine the nature of the mysterious “Dark Energy” which is unaccountably causing the universe to pushed apart at a faster and faster rate.

Postdocs Mentored

  • Erin O'Sullivan (2014/11-present)  
  • Alex Himmel (2011 - present)  
  • Tarek Akiri (2011 - 2013)  
  • Jennifer Prendki (2010 - 2011)  
  • Roger Wendel (May, 2008 - present)  
  • Maximilien Fechner (2006 - 2008)  
  • Naho Tanimoto (2005 - 2008)