Particle accelerators

Interview with Kevin Lesko, Senior Physicist at Lawrence Berkeley National Lab and former Spokesperson for LUX-ZEPLIN (LZ), an international collaboration searching for dark matter. Lesko explains why so many different kinds of physicists are involved in dark matter searches and how theorists have provided guidance for experimental and observational work to understand dark matter. He recounts his upbringing in northern California, the scientific influence of his parents and older siblings, and his decision to attend Stanford, where he worked on a tandem Van De Graaff in the nuclear physics lab. Lesko discusses his graduate work at the University of Washington, where he worked under the direction of Bob Vandenbosch on nuclear fission research, and he describes his postdoctoral appointment at Argonne, where he pursued experiments in nuclear fusion and neutrino physics. He explains his decision to join the staff at Berkeley Lab and how his interests centered increasingly on astrophysics with the Sudbury Neutrino Observatory. Lesko discusses his collaborations in Japan and KamLAND’s discovery of the absolute measurement of neutrino oscillations and the origins of the Homestake collaboration. He describes the transition of support for Homestake from the NSF to the DOE and he explains his entrée to the LUX collaboration and the reasons for the merger with ZEPLIN. Lesko explains how LZ needs to be ready to detect dark matter either as a singularity or is comprised of multiple components, and he considers what it might look like for dark matter to be detected. He recounts LZ’s success in ruling out dark matter candidates and he reflects on LBNL serving as a home base while his collaborative research has always been far-flung. At the end of the interview, Lesko considers what we have learned about the universe as a result of LZ, and why mystery and curiosity will continue to drive the field forward.

Interview with Timothy James Symons, Senior Scientist at Lawrence Berkeley National Laboratory and recently retired as Associate Laboratory Director for Physical Sciences, for which he ran the Lab’s programs in high energy and nuclear physics. Symons explains how the Lab has responded to the pandemic and the wide range of physics research he is following at Berkeley and beyond. He recounts his childhood in England and his early interests in science and the opportunities that led to his undergraduate education at Oxford where a tutor focused his interests in nuclear physics. Symons explains his reasons for remaining at Oxford for graduate school and the relevance of the SU(3) shell model for his thesis. He describes his postdoctoral work at the UK Science Research Council, and the opportunities that initially led him to Berkeley to work with David Scott on low energy nuclear structure. Symons provides a history of the Bevatron and the many reasons that compelled him to take a staff position. He describes the challenges in replacing the Bevelac, and the import of the ISABELLE cancellation at Brookhaven on Berkeley’s decisions. He provides detail on the interplay between laboratory experiments and DOE policy decisions and he explains the significant administrative pull of his work for NSAC. Symons reviews broadly the state of U.S. nuclear physics in the 1990s and the value of the APS as a sounding board in shaping policies for the decade. He does the same for rare isotopes in the early 2000s and how the Lab became involved in DUSEL. Symons describes his world as Associate Lab Director and he discusses his interactions with the Lab Director which gave him a high-altitude appreciate for the broad range of research across the Lab. He explains the Lab’s contributions in energy research which stems from Steve Chu’s directorship. At the end of the interview, Symons reflects on the significant changes in the Lab’s scope and mission over his career, the overall trend that once-disparate research areas are now increasingly on a path of convergence, and he conveys optimism on the fundamental discoveries that are within reach for the near future of nuclear physics.

In this interview, David Zierler, Oral Historian for AIP, interviews Persis Drell, James and Anna Marie Spilker Professor in the School of Engineering, Provost of Stanford, and former Director of SLAC. Drell recounts her childhood as the daughter of the eminent physicist Sid Drell and what it was like to grow up in this milieu, and she emphasizes her lack of interest in physics as a child. She explains her decision to attend Wellesley for her undergraduate education, and she describes the benefits she felt she gained in attending a woman's college where Professor Phyllis Fleming turned her on to physics. Drell discusses her graduate work at Berkeley, where her key mentors were Gene Commins, Dave Jackson, and George Trilling and where she developed her thesis research on systematic errors that could cause false asymmetries. She describes her postgraduate work at Lawrence Berkeley National Laboratory where she switched to high-energy experimental physics and began her work at SLAC. Drell describes the changing culture at SLAC in the 1980s and 1990s, and the structural changes that compelled the Lab to branch out to new scientific pursuits. She discusses her decision to join the faculty at Cornell where she focused on data analysis for the CLEO particle detector and Cornell Electron-positron Storage Ring (CESR) projects, and conveys the supportive culture of Cornell.  Drell describes the circumstances that compelled her to return to SLAC as director of research. She discusses the increasing importance of astrophysics and the B factory to SLAC's research agenda and the strategic challenges facing the Gamma-ray Space Telescope project. Drell explains the considerations leading to her being named lab director and some of the structural challenges in managing the relationship between SLAC and the Department of Energy (DOE). She describes the technical triumph of the Linac Coherent Light Source (LCLS) and the opportunities for better integration of SLAC with Stanford proper during her tenure, and she explains her decision to become dean of engineering at Stanford and then provost. Drell describes her most important responsibilities as provost, and at the end of the interview, she reviews some of the fundamental challenges that Stanford is facing as a result of the Covid-19 pandemic, and explains why, despite these challenges, students should feel optimistic about the future. 

In this interview, David Zierler, Oral Historian for AIP, interviews Carson Chow, Senior Investigator in the Laboratory of Biological Modeling in NIDDK, which is the National Institute for Diabetes and Digestive and Kidney Diseases at the National Institutes of Health. Chow recounts his family background and childhood in Toronto, his undergraduate education at the University of Toronto and his graduate work at MIT, where he completed his doctoral research in Spatiotemporal Chaos in the Three Wave Interaction. Chow discusses his broader interests in nonlinear dynamics and describes his postdoctoral work at the University of Colorado where he worked with John Cary on particle accelerator physics, and the events leading up to his work with Jim Collins of Boston University, who hired Chow to integrate nonlinear dynamics work into biomedical engineering. Chow explains how this work ultimately led to his decision to join the NIH, where he works on biological modeling and supercomputing in collaborative projects throughout the Institutes.

In this interview, AIP Oral Historian David Zierler interviews high energy physicist Sekazi Mtingwa. Mtingwa describes his upbringing in Atlanta, life under segregation as a child, and his early interests as a budding scientist. He discusses his undergraduate education at MIT, where he developed his interest in theoretical physics and became involved in student protests in the late 1960s. Mtingwa describes his graduate work at Princeton, the cultural differences he experienced there versus at MIT, and his dissertation, which focused on collisions of elementary particles at high energies. He describes his postdoc at the University of Rochester, and some of the changes he felt personally that led to his decision to change his name. Mtingwa discusses his work at Fermilab, where he worked on creating the Antiproton Source, and his decision to move to Argonne Lab to work on plasma wakefield accelerators. Mtingwa describes his decision to build up the physics program at North Carolina A&T and his work at Morgan State. At the end of the interview, Mtingwa discusses his work in recent years, which has included trips to Africa to expand science education, supporting minorities in science, and his service for the U.S. Nuclear Regulatory Commission.

Elizabeth Paris interviews Wolfgang Panofsky, Director of the Stanford Linear Accelerator Center from 1961 to 1984. In this interview, Panofsky discusses the design and construction of particle accelerators and colliders at SLAC, especially the SPEAR (Stanford Positron Electron Accelerating Ring) collider, and his work with Gerard O’Neil, Bernard Gittelman, Carl Barber, and Burt Richter. Panofsky describes his influence on science and national security policy as a member of the President’s Science Advisory Committee, his role in the Nuclear Test Ban Treaty, and his involvement with the Atomic Energy Commission and the Congressional Joint Committee on Atomic Energy.

Family background, early education, and science-technology interests in California and Oregon; Willamette College and radio electronics; contacts with E.O. Lawrence; career as graduate student at University of California, Berkeley, 1942-1949; war work at Berkeley Radiation Laboratory and Los Alamos; security; attitudes toward Trinity test and Hiroshima; postwar political involvement; big machines and general comments on postwar physics.

Founding of the school of physics, Università di Roma, role of Orso Mario Corbino and others in recruiting young physicists; the decision to work on nuclear physics; financial support for and public knowledge of work at the university; contacts with other laboratories in Europe and the U.S.; available technology in Rome, ca. 1930; journal literature; visitors to Rome; circumstances of move to Università di Palermo, 1936; work and facilities in Palermo; early failures of physicists to recognize fission; early uses of cyclotron; mathematics and nuclear physics in 1930s; models of the nucleus and experimental work; circumstances of move to University of California at Berkeley, 1938; experiment and theory in nuclear physics at Berkeley; work on radiochemistry; alteration of half-lives of beta-radioactive substances; detection equipment; effect of work at Los Alamos Scientific Laboratory on nuclear physics; significance of nucleon-nucleon scattering experiments; entry into nuclear physics of students trained in technology during World War II; beginnings of high-energy physics; experimental physics and particle accelerators; fashions in physics; discovery of the antiproton; work considered personally satisfying. Also prominently mentioned are: Edoardo Amaldi, Felix Bloch, Niels Henrik David Bohr, Paul Adrien Maurice Dirac, Michael Faraday, Otto Robert Frisch, Guglielmo, Georg von Hevesy, Ernest Orlando Lawrence, Tullio Levi-Cività, Lo Surdo, Ettore Majorana, Lise Meitner, Ida Noddack, J. Robert Oppenheimer, Carlo Perrier, Franco D. Rasetti, Ernest Rutherford, Glenn Seaborg, Elfriede Segrè, V. Volterra, Chien-Shiung Wu, Hideki Yukawa; Columbia University, and Purdue University.

Youth and early education; undergraduate years at Caltech, 1924-1929; influence of Arthur A. Noyes, Linus Pauling; graduate training and molecular beam work at Princeton University with Karl Compton, Edward U. Condon, Robert Van de Graaff, 1929-1932. National Research Council Fellow at University of California at Berkeley, 1932-1934; at Radiation Laboratory with Ernest O. Lawrence, J. Robert Oppenheimer; on Berkeley staff as teacher and working on cyclotrons, nuclear physics and radiochemistry, 1934-1940. War work at MIT, Underwater Sound Laboratory at San Diego, Los Alamos Scientific Laboratory, 1940-1945; Trinity Test. Postwar career at Berkeley working on accelerators; Nobel Prize, 1951. Also includes "Impressions of Trinity Test," 2 pp. Also prominently mentioned is: Jesse William Monroe DuMond.

Youth and early education; undergraduate years at Caltech, 1924-1929; influence of Arthur A. Noyes, Linus Pauling; graduate training and molecular beam work at Princeton University with Karl Compton, Edward U. Condon, Robert Van de Graaff, 1929-1932. National Research Council Fellow at University of California at Berkeley, 1932-1934; at Radiation Laboratory with Ernest O. Lawrence, J. Robert Oppenheimer; on Berkeley staff as teacher and working on cyclotrons, nuclear physics and radiochemistry, 1934-1940. War work at MIT, Underwater Sound Laboratory at San Diego, Los Alamos Scientific Laboratory, 1940-1945; Trinity Test. Postwar career at Berkeley working on accelerators; Nobel Prize, 1951. Also includes "Impressions of Trinity Test," 2 pp. Also prominently mentioned is: Jesse William Monroe DuMond.