Bulletin of the American Physical Society
APS March Meeting 2010
Volume 55, Number 2
Monday–Friday, March 15–19, 2010; Portland, Oregon
Session L8: Recent Advances and New Projects in Neutron and X-Ray Sources |
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Sponsoring Units: DPB Chair: Christoph Leemann, Thomas Jefferson Lab National Accelerator Facility Room: Portland Ballroom 255 |
Tuesday, March 16, 2010 2:30PM - 3:06PM |
L8.00001: Spallation Neutron Source Operating Experience and Outlook for Upgrades Invited Speaker: The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory is a MW-class accelerator-driven pulsed neutron source. The SNS began formal operations in October 2006. Since then, the beam power has been increased to 1 MW, the number of operating hours per year has increased to nearly 5000, the availability has increased to 85{\%}, and the number of operating neutron scattering instruments has increased to 13. Plans are in place to increase the beam power and availability to their design values of 1.4 MW and 90{\%} over the next two years, and to continue the build-out of instruments to 16 by 2012. Two upgrade projects are in the planning stages. In the first, the beam power of the SNS is increased to at least 2 MW by raising the beam energy from 1.0 to 1.3 GeV and the beam current by 60{\%}. In the second, a Second Target Station is constructed, and is powered by sharing beam pulses with the first target station. The operating experience will be described, as will the challenges that have been met along the path toward 1 MW beam power. The strategy for upgrades will also be presented. [Preview Abstract] |
Tuesday, March 16, 2010 3:06PM - 3:42PM |
L8.00002: LCLS - Status and Performance Invited Speaker: |
Tuesday, March 16, 2010 3:42PM - 4:18PM |
L8.00003: NSLS-II - Progress and Outlook Invited Speaker: |
Tuesday, March 16, 2010 4:18PM - 4:54PM |
L8.00004: FLASH, the Free-Electron Laser at DESY: Machine Performance and Recent Highlights from User Experiments Invited Speaker: FLASH, the Free-Electron Laser at DESY in Hamburg is a world-wide unique facility delivering intense ultra-short coherent radiation pulses in the wavelength range between 47 and 6.8 nm. FLASH is a high-gain free-electron laser based on a superconducting linear accelerator currently running at 1GeV. Laser amplification and saturation in the so-called SASE (self-amplified spontaneous emission) mode is achieved with a single pass of the electron bunch through a 30m undulator. A machine upgrade which has been started recently will boost the energy to 1.2 GeV expanding the wavelength range to below 5nm. After the upgrade FLASH will also include the seeding experiment sFLASH where an external laser will overlap with the electron beam to seed the SASE process. First beam with the upgraded facility is expected in spring 2010. Since 2005 FLASH has been operating as a user facility serving a large variety of experiments. The unprecedented brilliance of the femtosecond coherent pulses in the extreme ultraviolet (XUV) and soft x-ray regime has been used to study nonlinear process in laser-matter interaction for atoms and molecules, to gain new insights in the properties of matter under extreme conditions and to perform single shot lens-less imaging of nano-sized objects. Furthermore, the pulse duration of less than 30 femtoseconds has allowed to gain new insights in ultrafast dynamics of matter. In the talk I will review machine performance and give examples of highlight experiments. [Preview Abstract] |
Tuesday, March 16, 2010 4:54PM - 5:30PM |
L8.00005: RF Superconductivity -- An Essential Technology for 4$^{th}$ Generation Light Sources Invited Speaker: The 4$^{th}$ generation light sources, which are expected to produce high brilliance photon beams, will require very low emittance electron beams. This will put stringent requirements and demands on the electron sources and on the accelerators needed to produce them. The characteristics of the superconducting rf (SRF) technology makes it ideally suited for such facilities, whether free electron lasers or energy recovering linacs. The opportunities offered by the SRF technology for 4$^{th}$ generation light sources, and its challenges, will be presented and reviewed. [Preview Abstract] |
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