SLAC National Accelerator Laboratory
Showing 1-17 of 17 Results
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Martin Breidenbach
Professor of Particle Physics and Astrophysics, Emeritus
BioI have worked for more than 45 years in experimental particle physics, often in developing new kinds of electronics and instruments critical to the detectors that enable the physics experiments of interest. In 1965 through 1971, I was involved in the electron scattering program at SLAC. The deep inelastic experiments that discovered the scaling and point like structure in the nucleon, later interpreted as quarks, was my Ph.D. thesis. I then spent a year at CERN, mostly doing an experiment on minimum bias behavior of proton-proton scattering at the newly operating Intersecting Storage Rings. Despite intentions to stay longer at CERN, I was persuaded by Professor Richter to return to SLAC and join his SPEAR storage ring group. In the 1974 “November Revolution”, we discovered the and ’ particles, soon interpreted as bound states of charm-anti-charm quarks, which caused essentially complete acceptance of the quark model as real. Another critical discovery at SPEAR was the lepton, leading to the third family of the Standard Model.
Subsequently Professor Charles Baltay and I were co-spokesmen of the SLD, a comprehensive large detector for the SLAC Linear Collider (SLC), where we did Z physics, particularly polarization asymmetries possible because of the SLC polarized electron beam which led to a (correct) prediction of the Higgs mass, and precision b physics with a 300 MPixel CCD vertex detector.
I am now involved in the design of a detector for the International Linear Collider which may be built in Japan, which has led to substantial involvement in Si detector sensors and associated readout ASIC’s. I believe we have developed the first wafer scale sensors with on sensor traces leading to a relative small area “readout system on a chip” that delivers processed digital signals to a DAQ.
I also work on a search for neutrinoless double beta decay (02) in 136 Xe. The 02 experiment utilizes a liquid xenon TPC requiring ultra-low background materials, techniques, and locations, which was an education into rather different experimental techniques from collider detectors.
I am working on a new concept for an e+e- linear collider called C^3 for the Cool Copper Collider. The Cool Copper Collider (C3) is an advanced concept for a high energy e+e- linear collider. It is based on a new SLAC technology that dramatically improves efficiency and breakdown rate. C3 uses distributed power to each cavity from a common RF manifold and operates at cryogenic temperatures (LN2, ~80K). This makes it robust at high gradient: 120~MeV/m.
C3 is a promising option for a next-generation e+e- collider. It has the potential to reach energies of up to 1 TeV, which would allow it to study the properties of particles that are difficult to access with current experiments. C3 is also relatively affordable, which makes it a more viable option than some of the other proposed linear colliders.
Finally, these recent experiences have led to exploratory collaborative efforts in neuroscience, where we believe our SLAC expertise in sensors and electronics could be rather synergistic with Stanford efforts in tACs and in neural recording probes. -
Stanley Brodsky
Professor of Particle Physics and Astrophysics, Emeritus
BioRecipient of the Watkins Physics Award and Visiting Professorship by the Watkins Foundations at Wichita State University in November, 2017.
Awarded the International Pomeranchuk Prize for 2015.
The Pomeranchuk Prize is a major international award for theoretical physics, awarded annually since 1998 by the Institute for Theoretical and Experimental Physics (ITEP)
from Moscow to one international scientist and one Russian scientist, It is named after Russian physicist Isaak Yakovlevich Pomeranchuk, who together with Lev Landau,
established the Theoretical Physics Department of the Institute. The Laureates for 2015 were Professor Victor Fadin and myself.
Recipient of the 2007 J. J. Sakurai Prize in Theoretical Physics, awarded by the American Physical Society.
Honorary degree of doctor scientiarum honoris causa (dr.scient.h.c.) from Southern Denmark University
Alexander von Humboldt Distinguished U.S. Senior Scientist Award in 1987
Chair of the Hadron Physics Topical Physics Group (GHP) of the American Physical Society, 2010. -
Anders R. Nilsson
Professor of Photon Science, Emeritus
BioAnders Nilsson interests covers the application of synchrotron radiation to studies of surfaces and in liquids with a focus on studies catalytic processes in fuel cells, photoelectrochemical decomposition of water, CO2 reduction, chemical bonding on surfaces, structure of liquid water and aqueous solutions, interfacial processes of relevance to molecular environmental science and ultrafast processes on surfaces and in water.
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Charles Prescott
Professor at the Stanford Linear Accelerator Center, Emeritus
Current Research and Scholarly InterestsExperimental particle physics; parity violation in electron scattering experiments in End Station A; nucleon spin structure experiments with polarized electron beams and polarized solid targets; e+e- -> Zo studies with the SLD detector using the polarized electron beams of the SLC; Next Linear Collider detector studies; neutrinoless double beta decay in Xenon.
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Joachim Stöhr
Professor of Photon Science, Emeritus
BioEducation:
1968 Vordiplom in Physics, Bonn University, Germany
1971 M.S. in Physics, Washington State University, USA
1974 Dr. rer. nat. in Physics, TU München, Germany
Professional History:
Scientist at Lawrence Berkeley Laboratory (1976-77)
Senior Research Associate at Stanford Synchrotron Radiation Laboratory (1977-81)
Senior Staff Physicist at Exxon Research and Engineering Company (1981-85)
Research Staff Member at IBM Almaden Research Center (1985-89)
Manager, Department of Condensed Matter Science, IBM ARC (1989-91)
Manager, Department of Magnetic Materials and Phenomena, IBM ARC (1991-94)
Manager, Synchrotron Radiation Project, IBM ARC (1994-95)
Research Staff Member at IBM ARC (1995-99)
Professor of Photon Science, Stanford University (2000 – 2017)
Deputy Director, Stanford Synchrotron Radiation Lightsource (SSRL) (2000-2005)
Director, SSRL (2005-2009)
Director, Linac Coherent Light Source (LCLS) (2009-2013)
Professor Emeritus (2017 – present)
Fellowships, Awards, Honors:
Fulbright Scholarship 1969-70
Postdoctoral Scholarship from Deutsche Forschungsgemeinschaft 1975-76
Fellow of the American Physical Society since 1988
Adjoint Professor in Physics at Uppsala University, Sweden (1993-2000)
Consulting Professor at Stanford Synchrotron Radiation Laboratory (1994-1999)
IBM Outstanding Technical Achievement Award 1997
Hofstadter Lecture, Stanford University, 2010
Davisson-Germer Prize 2011 in Surface Physics from American Physical Society
Ångstrom Lecture, Uppsala University, 2017
Summary of Scientific Work:
My early scientific research focused on the development of x-ray based surface techniques, especially surface EXAFS and NEXAFS, and their use for the determination of the geometric arrangement and bonding of atoms, molecules and thin organic films on surfaces. This work is summarized in my review article “SEXAFS: Everything you always wanted to know about SEXAFS but were afraid to ask” (in X-Ray Absorption: Principles, Applications, Techniques of EXAFS, SEXAFS and XANES, Edits. D. Koningsberger and R. Prins, Wiley, 1988) and my 1992 book “NEXAFS Spectroscopy” (Springer).
My later research focused on magnetic materials and phenomena, in particular the study of magnetic thin films, interfaces and nanostructures, and their ultrafast dynamics by use of forefront x-ray techniques. This work forms the foundation of my 2006 book (with H. Siegmann) entitled “Magnetism: From Fundamentals to Nanoscale Dynamics” (Springer).
With the advent of x-ray free electron lasers (XFELs) around 2010 my research increasingly focused on the description of x-rays and their interactions with matter within modern quantum optics, leading to my 2023 book “The Nature of X-Rays and their Interactions with Matter”.
In total I have written 3 books, 10 review articles in the form of book chapters and about 250 scientific Journal publications. I hold 5 patents and have given more than 150 invited talks at international scientific conferences, about 100 colloquia at Universities and Scientific Research Institutions, and 3 public lectures on the topic of magnetism and x-ray free electron lasers.
More information on my career, research, students and postdocs is given on my Stanford website: https://stohr.sites.stanford.edu/ -
Sami Gamal-Eldin Tantawi
Professor of Particle Physics and Astrophysics, Emeritus
BioFor over a decade I have advocated for dedicated research efforts on the basic physics of room temperature high gradient structures and new initiatives for the associated RF systems. This required demanding multidisciplinary collaboration to harness limited resources. The basic elements of the research needed to be inclusive to address not only the fundamentals of accelerator structures but also the fundamentals of associated technologies such as RF manipulation and novel microwave power sources. These basic research efforts were not bundled with specific developments for an application or a general program. The emerging technologies promise a broad, transformational impact.
With this underlying philosophy in mind, in 2006 the US High Gradient Research Collaboration for which I am the spokesman was formed. SLAC is the host of this collaboration, which comprises MIT, ANL, University of Maryland and University of Colorado, NRL and a host of SBIR companies. This led to the revitalization of this research area worldwide. The international collaborative effort grew to include KEK in Japan, INFN, Frascati in Italy, the Cockcroft Institute in the UK, and the CLIC team at CERN.
This effort led to a new understanding of the geometrical effects affecting high gradient operations. The collaborative work led to new advances in understanding the gradient limits of photonic band gap structures. Now we have a new optimization methodology for accelerator structure geometries and ongoing research on alternate and novel materials. These efforts doubled the usable gradient in normal conducting high gradient linacs to more than 100 MV/m, thus revitalizing the spread of the technology to other applications including compact Inverse Compton Scattering gamma-ray sources for national security applications, and compact proton linacs for cancer therapy.
