Wednesday, October 4, 2017 – Coordinated by Starship Century
Pete Klupar, Chief Engineer, Breakthrough Initiatives
Are We Alone?–Searching For Life in the Universe
Breakthrough Foundation is doing to help humanity investigate the possibility of life forms on other planets, and how scientists can get involved. The Star Shot initiative—a plan to send a spacecraft to another star in the next 25 years—will be the main topic of the presentation. Mr. Klupar will also discuss the foundation’s other major initiatives: Listen and Watch. Listen is the search for extraterrestrial intelligence using RF (1 GHz to 30GHz) and visible light. Watch is the search for earth-sized planets in the habitable zone of nearby stars.
Bio: Prior to his role at the Breakthrough Foundation, Mr. Klupar was Director of Engineering at NASA’s Ames Research Center. While at Ames he developed the Aquila, LADEE, TESS, Pharmasat, OREO and other small spacecraft missions while aiding in the development and operation of the Kepler and SOFIA projects.
Kevin L. G. Parkin, Parkin Research LLC
Breakthrough Star Shot System Model and Trade Studies
A constraint-based system model has been built to represent beam-driven relativistic sails. The model is solved by inference engine and uses 1-DOF RK45 trajectory integration nested within several bisection and golden section solvers in order to minimize the capital cost of the beam director while holding fixed the sail velocity at beam cutoff. A Goubau beam is assumed, the energy spillage of which is recalculated on every integration step, forming the core of the key tradeoff between beam director effective diameter vs. transmit power vs. sail diameter vs. beam duration. This key tradeoff is driven by user-provided technology figures of merit for beam director areal cost ($/m^2), transmit power cost ($/Watt) and energy storage cost ($/kWh) as well as sail areal density (g/m^2) and optical properties. Since March 2016, the system model has been used to conduct parametric trade studies for a 0.2c mission to Alpha Centauri, a 0.01c precursor mission to a closer objective and a 70 km/s ground-based vacuum tunnel test facility. The results from these trade studies are presented.
Bio: Dr. Parkin is the Systems Director of Breakthrough Star Shot, founder of Parkin Research LLC and the inventor of the microwave thermal rocket. In 2005 he was awarded the Korolev Medal by the Russian Federation of Astronautics and Cosmonautics for his ground-breaking work in microwave thermal propulsion. In 2007, Dr. Parkin founded the Mission Design Center (MDC) at NASA Ames. From 2009 to 2015, he was a Research Faculty member at Carnegie Mellon Silicon Valley. In this role, he served as Principal Investigator of a $5M NASA-funded project to conduct innovative research to implement a sustainable and extensible vision for space exploration in the long term. From 2012-2014 he additionally served as Principal Investigator and Chief Engineer of a $3M DARPA-instigated project to build a small millimeter-wave thermal rocket and launch it. This resulted in the first millimeter-wave absorbent refractory heat exchanger, the first millimeter-wave thermal rocket, and the first high power cooperative target millimeter-wave beam director. These elements were combined to achieve the first millimeter-wave thermal rocket launch in early 2014. He is a member of the Institute of Physics (IOP) and holds an M.Phys. from the University of Leicester (1999), an M.S. from Caltech (2001) and a Ph.D. from Caltech (2006).
The Star Shot Propulsion System
The key concept for going to the stars in the Star Shot Project is to minimize the mass of the spacecraft by leaving the apparatus that propels the spacecraft on Earth. The force that accelerates the payload is light pressure generated by a laser system producing a controllable, coherent beam of light having an average power of the order of 100 GW. A 1-gram mass payload would experience an acceleration about 60,000 gees when subjected to the radiation pressure from this system (assuming imperfections). This talk addresses the many challenges confronting us in conceiving, designing, building, and operating such a propulsion system. Chief among these are developing a plan to coherently combine many millions of laser beams at the sail target in the presence of laser phase noise, large optical path length differences, and atmospheric refractive index fluctuations caused by turbulence, while maintaining a specified irradiance profile on the sail with sub nanoradian pointing jitter as it travels from high earth orbit to a distance equivalent to ten times the range to the Moon, all in a few hundred seconds.
Bio: Dr. Robert Q. Fugate is internationally recognized as the first to demonstrate the concept of laser guide star adaptive optics and to develop and apply needed technologies to make the concept practical on large ground-based telescopes. This technology allows researchers to overcome the limitations on image resolution set by the Earth’s atmosphere. Dr Fugate spent over 35 years in the Air Force Research Laboratory and retired as the Senior Scientist for Atmospheric Compensation in 2006. He created the Starfire Optical Range as the premier research organization in the DoD for correcting atmospheric effects on the propagation of light.
He championed the transition of this technology from DoD to the astronomy community. From early 2006, he was the Senior Technical Advisor on the staff of New Mexico Tech and retired with Emeritus status at the end of 2011. He now serves as a part-time consultant, speaker, and advisor to the Air Force and other US Government agencies and private organizations. His latest endeavor is serving on the advisory board for Breakthrough Star Shot and as Chairman of the Laser Subcommittee. He is a member of the National Academy of Engineering, has published over 100 papers and book chapters, presented dozens of invited talks, served on numerous international astronomy and telescope committees, and has received many honors.
James Benford, Microwave Sciences
Our First Starships: Sails & Payloads for Star Shot
Star Shot reduces the sail mass down to about a gram and sail scale to a few meters. The acceleration is driven by lasers with total power of 10-100 GW; accelerations are 10,000 100,000 gravities. Acceleration times are about 1-10 minutes. Constructing a laser light sail sufficient to propel a one-gram class spacecraft to 0.2c within a few decades using a laser beam director of approximately one-kilometer scale with a beam power of 10’s of GW requires thin and light-weight materials, perhaps metamaterials, meaning fabrication of meter-scale sails no more than a few hundred atoms thick. The material must be light enough yet highly reflective. Properties that influence material choice and fabrication, are its reflectance, absorptance and transmittance, tensile strength and areal density. Stability of he sail on the beam is influenced by sail shape, beam shape and the distribution of mass, such as payload, on the sail. The laser system interacts with the sail through its power density distribution on the sail, duration of the beam, width of the beam, pointing error of the beam as well as its pointing jitter.
Bio: James Benford is Sail System Director of Breakthrough Star Shot and President of Microwave Sciences, Inc. in Lafayette, California. His interests include high power microwave systems from conceptual designs to hardware, microwave source physics, electromagnetic power beaming for space propulsion, experimental intense particle beams and plasma physics. He is co-author of the textbook, High Power Microwaves, 3rd Edition (Taylor & Francis, 2016). He has a Ph.D in Physics at the University of California San Diego. He is an IEEE Fellow and an EMP Fellow.
David Messerschmitt, Professor Emeritus of Electrical Engineering and Computer Sciences, UC Berkeley
Data Return from Star Shot Probes: Live from Alpha Centauri!
Returning scientific data from a Star Shot mission will be challenging due to many factors, including limited available energy, transmit and receive antennas, pointing accuracy, and speed. This talk examines an optical downlink communicating image data. Available energy has to be beneficially allocated among attitude control, processing, and communications functions. The profile of the available power varies widely during and after an encounter. Especially relevant is the rapidly changing distance to a target star, and the impact of this distance on available solar energy. Based on known fundamental limits, the maximum total returned data is estimated for a set of alternative assumptions. For best-available coding algorithms, energy-balance tradeoffs between processing for source and channel coding and transmitted optical power are considered. For the benefit of audience members not well versed in communications theory, we include a brief tutorial on the fundamental limits to image coding and communications. This talk reports on joint work with Philip Lubin of the University of California at Santa Barbara and Ian Morrison of Swinburne University Australia, and draws heavily on near-Earth optical communications research at Jet Propulsions Laboratory and elsewhere.
Bio: David Messerschmitt is the Roger A. Strauch Professor Emeritus of Electrical Engineering and Computer Sciences (EECS) at the University of California at Berkeley. The first ten years of his career was spent at Bell Laboratories, where he participated in the exploratory development of digital communications. At Berkeley he has done research in digital communications and audio and video encoding, and has served as the Chair of EECS and the Interim Dean of the School of Information. He is the co- author of five books, including Digital Communication (Kluwer Academic Publishers, Third Edition, 2004). His doctorate in Computer, Information, and Control Engineering is from the University of Michigan, and he is a Life Fellow of the IEEE, a Member of the National Academy of Engineering, and a recipient of the IEEE Alexander Graham Bell Medal recognizing “exceptional contributions to the advancement of communication sciences and engineering”.
Thursday, October 5, 2017 – Coordinated by Tau Zero Foundation
Marc Millis, Founder, Tau Zero Foundation
Marc Millis lead NASA’s visionary “Breakthrough Propulsion Physics” project and created the milestone book, Frontiers of Propulsion Science, a compendium of scholarly research on propellantless space drives and faster-than-light flight. Earlier in his NASA career, Millis designed ion thrusters, electronic instrumentation for rockets, cryogenic propellant equipment, and even a cockpit display for free-fall aircraft flights. After 31 years with NASA, he retired in 2010 to devote full time to interstellar research and education via the Tau Zero Foundation.
Tau Zero is a place for thinking about the long-range future of space exploration. While others work on the next big thing, Tau Zero looks at emerging possibilities that could change our future. Instead of advocating a specific mission or vehicle, Tau Zero builds a foundation of reliable information from which future vehicles and missions can be created. This includes investigating ideas on the infrastructures for expanding human presence in space, launching interstellar probes, and all the way to the advancing the physics of faster-than-light flight.
Jeff Greason, Board Chairman, Tau Zero Foundation
Jeff Greason has over 25 years’ experience managing innovative technical project teams at XCOR Aerospace, Rotary Rocket and Intel Corporation, and now as CEO of Agile Aero. As president and co-founder of XCOR, he led the engineering team that developed over 14 different long-life, highly-reusable liquid-fueled rocket engines. He has also worked on a low-cost liquid propellant piston pump, and two manned reusable rocket aircraft – the EZ-Rocket and the X-Racer, which broke all previous barriers for low cost and rapid reflight of rocket vehicles with 66 successful flights between them.
Jeff is a recognized expert in reusable launch vehicle (RLV) regulations. He has been a member of the COMSTAC RLV working group since 2000 and presently serves on the full COMSTAC, and he was integral in the first spaceport license at an airport, in Mojave, California, and the first spaceport license at a scheduled air service airport, in Midland, Texas. He was one of the architects of the regulatory policy embodied in the 2004 Commercial Space Launch Amendments Act; following which he co-founded the trade association for the commercial space industry, now the Commercial Spaceflight Federation. He also recently took over as Chairman of the Board at the Tau Zero foundation, a non-profit group working towards practical interstellar transportation technologies.
In 2009 he was named by the White House to a panel of independent experts that examined alternatives for advancing the United States’ human space exploration agenda. Chaired by Normal Augustine, the Review of U.S. Human Space Flight Plans Committee examined ongoing and planned NASA activities and present options for a safe, innovative, affordable, and sustainable human space flight program after the retirement of the space shuttle. He has remained active in national space transportation policy and has given several widely circulated speeches on the subject.
Greason was cited by Time magazine in 2001 as one of the “Inventors of the Year” for his team’s work on the EZ-Rocket. In 2016 the National Space Society awarded him the Space Pioneer Award for Entrepreneurial Business. Mr. Greason holds 25 U.S. patents. He graduated with honors from the California Institute of Technology in Pasadena and currently lives in Midland, Texas.
Friday, October 6, 2017 – Coordinated by TVIW
Direct Miltipixel Imaging of an Exo-Earth with a Solar Gravitational Lens Telescope
Nature has presented us with a very powerful “instrument” that we have yet to explore and learn to use. This instrument is the Solar Gravitational Lens (SGL), which results from the ability of the gravity field of the Sun to focus light from faint, distant targets. In the near future, a modest telescope could operate on the focal line of the SGL and, using the enormous magnification power of the Lens, could provide high-resolution images and spectroscopy of a habitable exoplanet. We discuss the imaging properties of the SGL, when the image occupies many pixels in the region near the optical axis. We discuss a mission to the SGL focal region that could provide us with direct, multi-pixel, high-resolution images and spectroscopy of a potentially habitable Earth-like exoplanet. Based on our initial studies, we find that such a mission could produce (1,000×1,000) pixels images of “Earth 2.0” at distances up to 30pc with spatial resolution of ~10 km on its surface, enough to see its surface features. We address some aspects of mission design and spacecraft requirements, as well as capabilities needed to fly this mission in the next two decades.
Bio: Dr. Turyshev is a physicist at the NASA Jet Propulsion Laboratory, California Institute of Technology, whose areas of research include gravitational and fundamental physics, research in astronomy, astrophysics and planetary science. He is an expert in spacecraft navigation, solar system dynamics, satellite and lunar laser ranging, planetary research and related technology efforts spanning detectors, instruments and data analysis. Dr. Turyshev has made a number of significant accomplishments: i) successful resolution of the Pioneer anomaly; ii) development of new methods to describe performance of the long-baseline optical interferometers; iii) major improvements in the tests of general relativity; Developed several new missions and experiments to test general relativity; iv) proposed new method to describe relativistic dynamics of N-body system and spacecraft observables; v) developed new instruments and methods for lunar laser ranging including new design of a hollow laser corner-cube retroreflector instrument and new LLR techniques; v) developed a new wave-theoretical treatment of the Solar Gravitational Lens (SGL) and proposed a new mission concept of direct megapixel imaging and spectroscopy of an exoplanet from the focal area of the SGL. Dr. Turyshev has published over 175 research papers, 2 books. Over the years, he actively participated in organization of and contribution to technical meetings, symposia, committees, industry and NASA review panels. Organized major international conferences; edited their proceedings. Since 2012 he is an Adjunct Professor at the UCLA’s Department of Physics and Astronomy. In 2016 Dr. Turyshev was elected a corresponding member of the International Academy of Astronautics.
Bio: As Chair of the House Commerce, Justice, Science, and Related Agencies (CJS) Appropriations Subcommittee, which funds NASA, the Congressman is focused on ensuring that NASA receives the funding and guidance necessary to maintain US leadership in space. He supports additional funding for NASA and believes it is crucial for the agency to have a clear vision that is driven by science and inspires our young people to study science and mathematics. The Space Launch System heavy-lift rocket and Orion multi-purpose crew vehicle will be critical components of our capability to return to the moon or lunar orbit, to reach Mars, and to go beyond. He authored the Space Leadership Preservation Act to make NASA more professional and less political by establishing a long-term NASA Administrator who overlaps presidential administrations, creating a board to drive the vision for NASA exploration, and allowing NASA to develop spacecraft using long term contracts.