Bulletin of the American Physical Society
2010 Fall Meeting of the APS Division of Nuclear Physics
Volume 55, Number 14
Tuesday–Saturday, November 2–6, 2010; Santa Fe, New Mexico
Session MH: TPCs and Beam Instrumentation |
Hide Abstracts |
Chair: Christopher Mauger, Los Alamos National Laboratory Room: Lamy |
Saturday, November 6, 2010 8:30AM - 8:42AM |
MH.00001: A Fission Time Projection Chamber for High Precision Cross Section Measurements Lucas Snyder, Uwe Greife The design of next generation nuclear reactors and other nuclear applications are increasingly dependent on advanced simulations. Sensitivity studies have shown a need for high precision nuclear data to improve the predictive capabilities of these simulations. The Neutron Induced Fission Fragment Tracking Experiment (NIFFTE) collaboration has constructed and is currently testing a prototype Time Projection Chamber (TPC) designed to measure fission cross sections to a higher accuracy than is capable with existing technology. In this talk, I will discuss the status of the fission TPC and progress on collecting the first set of data from $^{252}$Cf spontaneous fission. [Preview Abstract] |
Saturday, November 6, 2010 8:42AM - 8:54AM |
MH.00002: Online Computing for a Time Projection Chamber Designed to Make High Precision Fission Cross-Section Measurements Hai Qu The Neutron Induced Fission Fragment Tracking Experiment (NIFFTE) will employ a novel, high granularity, pressurized Time Projection Chamber to measure fission cross-sections of the major actinides to sub-1{\%} precision over a wide incident neutron energy range. The NIFFTE online computing system consists of many components. The run control will be able to ensure the safe operation of the detector and assure the quality of the data in real time. The custom-designed packet receiver and event builder are responsible for collecting and packing complete events. All these components will be integrated into a single system that will allow collaborators to help run the experiment remotely. In this talk, the design, implementation and current status of the online computing system as well as the DAQ hardware will be presented. [Preview Abstract] |
Saturday, November 6, 2010 8:54AM - 9:06AM |
MH.00003: Feasibility of a Spin Light Polarimeter at 12 GeV JLab Dipangkar Dutta The future 12 GeV program at JLab includes several key high precision experiments that aim to use parity violation in electro-weak interactions to search for Physics beyond the standard model. These include the ultra precise M{\o}ller experiment and the parity violating deep inelastic scattering experiment. These experiments will all rely on precision electron polarimetry with uncertainty of $\sim$ 0.4 \%. This ambitious goals can be achieved if several independent and high precision polarimeters are used simultaneously. In addition to being precise, the polarimeters must be non-destructive and must achieve the desired statistical precision in the shortest time possible. A complimentary polarimetry technique based on the spin dependence of synchrotron radiation referred to as ``spin light,'' is often overlooked. We have explored the feasibility of a spin light polarimeter at JLab for the 12 GeV era. We will present some of these results of the feasibility study and the conceptual design of a spin light polarimeter. Such a device promises to be a high precision, fast and continuous relative polarimeter. A R\&D proposal to develop a spin light polarimeter at JLab will also be discussed. [Preview Abstract] |
Saturday, November 6, 2010 9:06AM - 9:18AM |
MH.00004: A Quadrupole Band-Pass Filter for LANSCE protons Stephen Wender, R.J. Peterson, Jonathon Morrow Neutrons are produced for many purposes at the LANSCE facility by 800 MeV protons into a thick tungsten target. The reactions also yield a continuum of protons, emerging at energies up to about 700 MeV; these protons are currently absorbed to allow neutron experiments. We have designed a quadrupole doublet band-pass filter to focus a narrow range of proton energies onto small samples, for instance the size of electronic circuit elements. Wrong proton energies are spread over a wider area and diluted. One may thus irradiate such small samples with protons from about 50 to 700 MeV by adjuting the quadrupole current. For a typical example with an existing doublet, a one cm diameter sample could receive protons at 470 MeV with 38 MeV FWHM energy resolution at a flux of 1.9x107 protons per second within that energy band, using the 30 degree port of the WNR facility. The flux of protons below 440 MeV or above 530 MeV is reduced by a factor of ten or more. Since the produced range of proton energies is similar to that of protons above the atmosphere, such a band-pass system would be of great use to study proton-induced processes in the components of orbiting systems. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700