Center for Bright Beams

Transcription

1 Center for Bright Beams Overview J. Ritchie Patterson

2 Industry Food & product safety Contraband detection Bridge safety Semiconductor fabrication Medicine Tumor detection and treatment. Why accelerators? ~30,000 industrial and medical accelerators are in use, with annual sales of $3.5 B and 10% growth per year. Research X ray sources and colliders for nuclear & particle physics Electron microscopes Since 1943, a Nobel Prize in Physics has been awarded to research benefiting from accelerators every 3 years. Since 1997, the same has been true of Chemistry. 2

3 Research Mission Transform the reach of electron beams by Increasing brightness x100, and Reducing the cost and size of key enabling technologies. Impact: Better beams of electrons... and by extension X-rays, protons, neutrons and ions... for applications ranging from giant colliders to table top electron microscopes. 3

4 Vision Bright electron beams that Reveal not only the structure of biological molecules, but also their function. Movies of molecules in action using ultrafast electron diffraction State-of-the art 100 fs electron source With 100x more brightness 4

5 Bright beams that Vision Enable a sustainable future Proton accelerators to drive nuclear power plants or transmute nuclear waste into shorter lived, more manageable by-products. The MYRRHA research reactor in Belgium will test accelerator-driven systems for nuclear power generation. 5

6 Bright electron beams that Create a safer world. Vision Cargo imaging using a compact, high power X-ray source. The same technology benefits oil exploration, medical equipment sterilization, and tire manufacturing. 6

7 Vision Bright beams that Explain how remarkable material properties emerge from complex correlations T Intertwined Phase 5-20 nm The dynamics of High T c and other strongly correlated materials with hard x-rays with nm spot size and high transverse coherence. Unconventional Superconductors Nature 466, 347 (2010). x Achievable with a bright new source for LCLS-II. 7

8 Bright beams that Vision Treat tumors without damaging nearby tissue. source linac CCL (TER A) Better, cheaper proton and carbon beams for Radiotherapy. ± 5 mm every pulse TULIP - UA U. Amaldi and TULIP. 8

9 Bright electron beams that Extend Moore s Law Vision Integrated Circuit (IC) fab with 5nm structures using Extreme UV lithography IBM unveils chip with 7nm features, July

10 Vision Bright electron beams that Glimpse nearer the Big Bang Map is for scale only. Japan may build the linear collider, with international help. Cost will be a deciding factor. Higher accelerating fields for a Linear Collider that costs less and has a smaller footprint. Alternatively, keep the footprint the same, and double the scientific reach. 10

11 Vision Bright electron beams that Tell us where the proton gets its spin Higher luminosity in an Electron-ion collider to peer deeper inside the proton 11

12 CBB research goal Transform the reach of electron beams by Increasing brightness x100, and LOW BRIGHTNESS High emittance HIGH BRIGHTNESS Low emittance Reducing the cost and size of key enabling technologies. Emittance = Size x angular spread 12

13 Theme: Beam production Goal: Methods for x100 brighter electron beams through better photocathodes. For brighter beams for X-ray sources, colliders and electron imaging. Areas of investigation: Band structure Thermal effects Multi-electron scattering Phonon-scattering Surface roughness Light Electron beam Photocathode Sample discoveries: Band structure can sculpt the emitted transverse momentum spectrum. Phonon scattering appears to be important. 13

14 Theme: Beam acceleration Input RF power at 1.3 GHz Slowed down by factor of approximately 4x10 9 Goals: Methods for x10 lower power losses. For lower costs, simpler refrigeration and wider access to high-power beams. x2 accelerating gradient Compound superconductors promise cheaper, more compact acceleration. Areas of investigation: Doping effects in niobium Vortex nucleation & flux trapping Nb 3 Sn growth, grain orientation and superconducting properties Sample discovery: The field in Nb 3 Sn cavities is limited by flux penetration at defects. Grain boundaries? Tin-depleted layers? NbO on (100) Nb TEM Nb 3 Sn grains Grain Orientation cross section in Nb 3 Sn Sn conc. 14

15 Impact for SRF operations Superconducting RF refrigeration systems, for one cavity. 2K (Today) Cost: ~$1M 4.2K Cost: $50k 4.2K operation will make Superconducting RF vastly more accessible, enabling widespread use of high power beams in science and industry. 15

16 Theme: Beam transport and storage Goal: Methods for beam transport that preserve the quality of x100 brighter beams in linear accelerators and electron microscopes and x10 brighter beams in storage rings. For better, cheaper beam control. Areas of investigation: Nonlinearities in storage rings Mathematical algorithms for nonlinear dynamics Aberration correction in electron microscopes Space charge control Sample discovery: Electron microscope tuning can be described with a sloppy model, reducing the number of tuning parameters from >100 to ~10. 16

17 Research Optimal Outcomes Beam Production Methods for better photocathodes Beam Acceleration Methods for better superconducting RF accelerating cavities Beam Transport and Storage Methods for less disruptive beam transport Integration of these methods in order to optimize high performance accelerator systems. 17

18 Accelerator brightness today (Transverse normalized emittance) -1 (m-rad) -1 Conventional e- imaging Single shot UED/UEM CW XFELs High Brightness ILC Materials and food processing X-Ray storage rings and ERLs Electron-ion Colliders 18

19 Collaboration Year 1 21 faculty or sr. scientists 5 postdocs 20 doctoral students 20 summer students 10 affiliates (<160 hrs/yr) 5 educators, evaluators (0.6 FTE) 4 administration, IT communication (2.1 FTE) 19

20 Our students and post-docs Stas Baturin Mariah Brown Paul Cueva Will DeBenedetti Alice Galdi Lipi Gupta Brianna Harris Siddharth Karkare William Li Danilo Liarte Andy Linscheid James Maniscalco Alison McMillan Kevin Nangoi Thomas Oseroff Alden Pack Chris Parzyck Ryan Porter Jeff Sayler Nathan Sitaraman Erik Skibinski Aron Darren Tesfamichael Veit 20

21 New CBB faculty Assistant Professor Jared Maxson CBB postdoc at UCLA, hired as Cornell faculty member Active in Beam Production and Beam Transport and Storage CBB seed funding for students (our first seed!) Assistant Professor Lena Fitting Kourkoutis Applications of bright beams Becoming a CBB participant one year earlier than planned. Expert in microscopy. CBB hire! 21

22 The Beam Team TRIUMF U Toronto LBNL Brigham Young U Chicago Fermilab Cornell UCLA Clark Atlanta U U Florida 22

23 CBB Team Identify the problem Accelerator challenge Build the team Accelerator science Surface chemistry Nonlinear dynamics Condensed matter physics Materials science Ultrafast electron microscopy Elementary particle physics 23

24 CBB Team Is it a bunch of electrons or a packet? How many kj/mol in a Hartree? Do I share interim results? Who gets to comment on my paper draft? Where do I publish? How often do I go to conferences? Accelerator science Surface chemistry Nonlinear dynamics Condensed matter physics Materials science Ultrafast electron microscopy Elementary particle physics Team-building is essential. Goal: Become a model for Team Science 24

25 Workforce Development Examples: Eight URM Master s students and undergrads in research Two workshops with middle school teachers Bi-weekly grad student only meetings Four professional development workshops YouTube pedagogical lectures Biweekly theme meetings Face-to-face collaboration meeting 25

26 Optimal Outcomes Knowledge Transfer Transfer CBB approaches into new accelerators and commercial products. Educate graduate students to recognize and transfer their skills to industry and lab partners. Field Emission Sources for TEM, SEM, UTEM Beam Transport and Storage APS-U metrology and wafer inspection (SEM, x-ray) Cargo Inspection & sterilization Sample activity: Symposium with invited speakers from industry and the national accelerator labs. Ultrafast MeV TEM Ultrafast TEM UED Beam Production XFEL EUV lithography electron ion collider SRF Cavities Beam Acceleration SRF Cavities PEP-II 26

27 Center for Bright Beams Questions? 27