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Astrophysical Background:
Charge: Review of the physical process and where topic is important in Astrophysics. What parameter regimes and/or geometry are necessary to learn something important? What needs to be measured?
Experimental or Numerical Modeling Scenario:
Charge: Conceptual design of plasma experiment (in MPDX or otherwise) and feasibility. Hardware implementation, geometry, and required plasma parameters. What can be measured?
Speakers
| Day I - Tue. Dec 15 | |
| 8:30-9:15 | Welcome and Introduction | Cary Forest |
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| 9:15-10:00 | MHD Dynamos | Stas Boldyrev
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| From a pure MHD standpoint, how do we optimize the experiment for studying outstanding questions in dynamos? What flow topologies are optimal? Can time dependent (Galloway Proctor flows) be devised in a sphere? How does compressibility and/or high Pm possible in plasma change outlook. |
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| 10:00-10:30 | Break | |
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| 10:30-11:30 | Plasma Dynamos | Steve Cowley
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| Where and when do two fluid or kinetic effects become important in astrophysical dynamos? What parameter regime and geometry is optimal for studying this in experiment? Hall effects; firehose, mirror |
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| 11:30-12:15 | Discussion | Hantao Ji |
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| 12:15-1:30 | Lunch (provided) | |
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| 1:30-3:30 | Plasma MRI | Greg Hammett (45 min)
Hantao Ji (30 min)
Cami Collins (15 min)
Fatima Ebrahami+Ivan Khalzov (30 min) |
| Standard MRI flow; what will Hall (both MHD and neutral collisions) effects, anisotropic pressure and collisionless MRI look like. What do we need to diagnose it. |
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| 3:30-4:00 | Break | |
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| 4:00-5:00 | Rotating Convection: | Ben Brown |
| compressibility and stratification |
| Compositional/temperature/magnetic buoyancy driven instabilities in stratified, rotating plasmas; ECH applied to boundary provides heating and buoyancy; Role of Reynolds stress on rotation profile; stratification; Magnetic buoyancy |
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| 5:00-6:00 | Discussion | Fausto Cattaneo |
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| 7:00-9:30 | Group Dinner | |
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| Day II - Wed. Dec 16 | |
| 8:30-9:15 | Plasma Turbulence at High Beta |
Troy Carter |
| See MRI and Plasma Dynamos; Self-excitation not critical; chaotic stirring is. Turbulence in near equipartition. Ion heating. Inertial range; transition from unmagnetized to magnetized (anisotropy) | | | |
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| 9:15-10:00 | Jets and Disks | John Everett |
| Plasma Gun array injecting into high beta plasma; equilibrium, loss of equilibrium, collimation; focus on steady state aspects and role of external plasma pressure |
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| 10:00-10:30 | Break | |
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| 10:30-11:15 | Comic Ray Acceleration by Plasma Turbulence | Ken Fowler | |
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| 11:15-11:45 | Flow driven reconnection | Barrett Rogers |
| 2D Reconnection of multipolar magnetic fields in spherical source, with fields that drop off outward. Rotating plasma wind tunnel impinging on a dipole. |
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| 11:45-12:15 | A review of Terrella experiments investigating the Solar Wind/Magnetosphere interaction | Mark Koepke |
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| 12:30-12:45 | Discussion | Troy Carter |
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| 12:45-1:45 | Lunch (provided) | |
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| 1:45-2:30 | Pulsar Winds and Shocks | Jonathan Arons |
| Concept: rotating dipole built into source in center in center of sphere, spewing off magnetic fields of alternating polarity; as density drops off, Alfvén velocity approaches speed of light. Heliospheric, sectored structure of heliosphere solar wind. Anomalous Cosmic Rays from Fermi accelleration from reconnection(Drake). |
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| 2:30-3:15 | Partially Ionized MHD | Ellen Zweibel |
| In what parameter regime should we be concerned with neutral particles in MHD? How does this differ from Hall MHD? |
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| 3:15-3:45 | Break | | |
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| 3:45-4:15 | Skunkworks | Cary Forest |
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| 4:15-6:00 | Discussion | Ellen Zweibel |
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| DAY III: MPDX Design Review - Thurs. Dec 17 | |
| | Panel: Troy Carter, Fred Skiff, Mike Brown, Dave Anderson, Peter Titus |
| 9:00-9:30 | Overview | Cary Forest |
| Facility, Infrastructure, time line |
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| 9:30-10:15 | Vessel, Magnets, and Cooling | John Wallace |
| Primary issues related to assembly of high field magnets, internal water cooling, insulating plasma facing components |
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| 10:15-10:45 | Break | |
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| 10:45-11:15 | LaB6 Plasma Source | Troy Carter |
| Large Area, spherical, plasma source (review of similar sources elsewhere, and design of spherical source) |
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| 11:15-11:30 | Data Acquisition and Control | Alex Squitieri |
| GA PCS, DTAQ, RealTime MDSPlus, Power supplies (review similar systems in use on MST, and give overview of how this will be implemented on experiment). |
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| 11:30-12:00 | Programmable Power Supplies | Don Holly |
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| 12:00-1:00 | Diagnostic Overview | Weiging Ding |
| Port layout, access. Probes, Faraday Rotation/Interferometry, Gas Puff imaging using fast camera, CXRS for flow, external magnetics, LIF, Brainstorming |
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| 1:00-1:30 | Working Lunch (provided) | |
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| 1:30-3:00 | Discussion | |
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| 3:30 | Adjourn | |
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