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Energize Your Photovoltaics: NREL's Process Development and Integration Laboratory (PDIL)

Description: The Process Development and Integration Laboratory (PDIL) at the National Renewable Energy Laboratory (NREL) is a unique collaborative facility where industry and universities can work closely with NREL scientists on integrated equipment to answer pressing questions related to photovoltaics (PV). The integrated equipment includes deposition, processing, and characterization tools. We work with a wide range of PV materials, from crystalline silicon to thin-films (amorphous, nano- and microcrysta… more
Date: April 1, 2008
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A High Vacuum High Speed Ion Pump

Description: A vacuum pump based on the properties of a magnetically collimated electric discharge is described. It has a speed in the range 3000 to 7000 liters a second and a base pressure in the order of 10{sup-6}mm.
Date: August 27, 1952
Creator: Foster, J. S., Jr.; Lawrence, E. O. & Lofgren, E. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Component Manufacturing Development for the National Compact Stellarator Experiment (NCSX)

Description: NCSX [National Compact Stellarator Experiment] is the first of a new class of stellarators called compact stellarators which hold the promise of retaining the steady state feature of the stellarator but at a much lower aspect ratio and using a quasi-axisymmetric magnetic field to obtain tokamak-like performance. Although much of NCSX is conventional in design and construction, the vacuum vessel and modular coils provide significant engineering challenges due to their complex shapes, need for hi… more
Date: October 28, 2004
Creator: Heitzenroeder, P. J.; Brown, T. G.; Chrzanowski, J. H.; Cole, M. J.; Goranson, P. L.; Neilson, G. H. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Structural Analysis of the NCSX Vacuum Vessel

Description: The NCSX (National Compact Stellarator Experiment) vacuum vessel has a rather unique shape being very closely coupled topologically to the three-fold stellarator symmetry of the plasma it contains. This shape does not permit the use of the common forms of pressure vessel analysis and necessitates the reliance on finite element analysis. The current paper describes the NCSX vacuum vessel stress analysis including external pressure, thermal, and electro-magnetic loading from internal plasma disru… more
Date: September 28, 2004
Creator: Dahlgren, Fred; Brooks, Art; Goranson, Paul; Cole, Mike & Titus, Peter
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fast Neutral Pressure Measurements in NSTX

Description: Several fast neutral pressure gauges have been installed on NSTX [National Spherical Torus Experiment] to measure the vessel and divertor pressure during inductive and coaxial helicity injected (CHI) plasma operations. Modified, PDX [Poloidal Divertor Experiment]-type Penning gauges have been installed on the upper and lower divertors. Neutral pressure measurements during plasma operations from these and from two shielded fast Micro ion gauges at different toroidal locations on the vessel mid-p… more
Date: August 6, 2002
Creator: Raman, R.; Kugel, H. W.; Provost, T.; Gernhardt, R.; Jarboe, T. R. & Bell, M. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental Investigation of m=1 Diocotron Mode Growth at Low Electron Densities

Description: Previous experiments on the Electron Diffusion Gauge showed that the diocotron mode damping increases with higher neutral gas filling pressure. Yet the energy dissipated from a rotating plasma by collisions with neutrals is predicted to excite the mode. To resolve this, experiments have been conducted to examine the coupling between expansion and the m=1 diocotron mode. Results from recent experiments have shown interesting phenomena: (1) The degree and sensitivity of mode growth is observed to… more
Date: August 21, 2003
Creator: Paul, Stephen F.; Morrison, Kyle & Davidson, Ronald C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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