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0.7-eV GaInAs Junction for a GaInP/GaAs/GaInAs(1-eV)/GaInAs(0.7-eV) Four-Junction Solar Cell: Preprint

Description: We discuss recent developments in III-V multijunction solar cells, focusing on adding a fourth junction to the Ga0.5In0.5P/GaAs/Ga0.75In0.25As inverted three-junction cell. This cell, grown inverted on GaAs so that the lattice-mismatched Ga0.75In0.25As third junction is the last one grown, has demonstrated 38% efficiency, and 40% is likely in the near future. To achieve still further gains, a lower-bandgap GaxIn1-xAs fourth junction could be added to the three-junction structure for a four-junc… more
Date: May 1, 2006
Creator: Friedman, D. J.; Geisz, J. F.; Norman, A. G.; Wanlass, M. W. & Kurtz, S. R.
Item Type: Refine your search to only Article
open access

1,2- Hydroxypyridonates as Contrast Agents for Magnetic ResonanceImaging: TREN-1,2-HOPO

Description: 1,2-Hydroxypyridinones (1,2-HOPO) form very stable lanthanide complexes that may be useful as contrast agents for Magnetic Resonance Imaging (MRI). X-ray diffraction of single crystals established that the solid state structures of the Eu(III) and the previously reported [Inorg. Chem. 2004, 43, 5452] Gd(III) complex are identical. The recently discovered sensitizing properties of 1,2-HOPO chelates for Eu(III) luminescence allow direct measurement of the number if water molecules in the metal co… more
Date: May 8, 2007
Creator: Jocher, Christoph J.; Moore, Evan G.; Xu, Jide; Avedano, Stefano; Botta, Mauro; Aime, Silvio et al.
Item Type: Refine your search to only Article
open access

A 1.8 Mev K+ injector for the high current beam transport experiment fusion

Description: For the High Current Beam Transport Experiment (HCX) at LBNL, an injector is required to deliver up to 1.8 MV of 0.6 A K{sup +} beam with an emittance of {approx}1 p-mm-mrad. We have successfully operated a 10-cm diameter surface ionization source together with an electrostatic quadrupole (ESQ) accelerator to meet these requirements. The pulse length is {approx}4 {micro}s, firing at once every 10-15 seconds. By optimizing the extraction diode and the ESQ voltages, we have obtained an output bea… more
Date: May 20, 2002
Creator: Kwan, J. W.; Bieniosek, F. M.; Henestroza, E.; Prost, L. & Seidl, P.
Item Type: Refine your search to only Article
open access

1-MeV-Electron Irradiation of GaInAsN Cells: Preprint

Description: This conference paper describes the GaInAsN cells that are measured to retain 933% and 894% of their original efficiency after exposure to 5 X 1014 and 1 X 1015 cm-2 1-MeV electrons, respectively. The rate of degradation is not correlated with the performance at beginning of life (BOL). The depletion width remains essentially unchanged, increasing by< 1%. Temperature-coefficient data for GaInAsN cells are also presented. These numbers are used to project the efficiency of GaInAsN-containing … more
Date: May 1, 2002
Creator: Kurtz, Sarah; King, R. R.; Edmondson, K. M.; Friedman, D. J. & Karam, N. H.
Item Type: Refine your search to only Article
open access

2.5 MHz feedforward beam loading compensation in the Fermilab Main Injector

Description: There are five 2.5 MHz ferrite cavities (h = 28) in the Main Injector with an R/Q of 500 that are presently used for coalescing for the Tevatron. For use with the Fermilab Recycler, feedforward (FF) beam loading compensation (BLC) is required on these cavities because they will be required to operate at a net of 2 kV. Under current Recycler beam conditions, the beam-induced voltage is of this order. Recently a system using a digital bucket delay module operating at 53 MHz (h = 588) was used to … more
Date: May 19, 2003
Creator: Dey, Joseph E.; Kourbanis, Ioanis & Steimel, James
Item Type: Refine your search to only Article
open access

2-D Simulations of Drainage Winds and Diffusion Compared to Observations

Description: A vertically integrated dynamical drainage flow model is developed from conservation equations for momentum and mass in a terrain-following coordinate system. Wind fields from the dynamical model drive a Monte Carlo transport and diffusion model. The model needs only topographic data, an Eulerian or Lagrangian time scale and a surface drag coefficient for input data, and can be started with a motionless atmosphere. Model wind and diffusion predictions are compared to observations from the rugge… more
Date: May 29, 2001
Creator: Garrett, A. J.
Item Type: Refine your search to only Article
open access

A 2-Liter, 2000 MPa Air Source for the Radiatively Driven Hypersonic Wind Tunnel

Description: The A2 LITE is a 2 liter, 2000 MPa, 750 K ultra-high pressure (UHP) vessel used to demonstrate UHP technology and to provide an air flow for wind tunnel nozzle development. It is the largest volume UHP vessel in the world. The design is based on a 100:1 pressure intensification using a hydraulic ram as a low pressure driver and a three-layer compound cylinder UHP section. Active control of the 900 mm piston stroke in the 63.5 mm bore permits pressure-time profiles ranging from static to constan… more
Date: May 30, 2002
Creator: Costantino, M & Lofftus, D
Item Type: Refine your search to only Article
open access

3,2-HOPO Complexes of Near-Infra-Red (NIR) Emitting Lanthanides: Sensitization of Ho(III) and Pr(III) in Aqueous Solution

Description: There is a growing interest in Near Infra-Red (NIR) emission originating from organic complexes of Ln{sup III} cations. As a major impetus, biological tissues are considerably more transparent at these low energy wavelengths when compared to visible radiation, which facilitates deeper penetration of incident and emitted light. Furthermore, the long luminescence lifetimes of Ln{sup III} complexes (eg. Yb{sup III}, {tau}{sub rad} {approx} 1 ms) when compared to typical organic molecules can be ut… more
Date: May 19, 2008
Creator: Moore, Evan G.; Szigethy, Geza; Xu, Jide; Palsson, Lars-Olof; Beeby, Andrew & Raymond, Kenneth N.
Item Type: Refine your search to only Article
open access

3-D full waveform inversion of seismic data; Part I. Theory

Description: Full waveform inversion of seismic data is a challenging subject partly because of the lack of precise knowledge of the source. Since currently available approaches involve some form of approximations to the source, inversion results are subject to the quality and the choice of the source information used. A new full waveform inversion scheme has been introduced (Lee and Kim, 2003) using normalized wavefield for simple two-dimensional (2-D) scalar problems. The method does not require source in… more
Date: May 12, 2003
Creator: Lee, Ki Ha
Item Type: Refine your search to only Article
open access

''6-Degrees of Freedom'' Single Crystal Plasticity Experiments

Description: A deformation experiment has been developed specifically for the purpose of validation of dislocation dynamics simulations of plastic flow up to strains on the order of 1% [1]. The experiment has been designed so that a compressive uniaxial stress field is essentially super imposed on the test sample, and the crystal is free to deform with 3 orthogonal translation directions, and 3 rotation/tilt axes of freedom and has been given the name ''6-degrees of freedom'' (6DOF) experiment. The rotation… more
Date: May 21, 2003
Creator: Lassila, D. H.; Florando, J. N.; LeBlanc, M. M.; Arsenlis, T. & Rhee, M.
Item Type: Refine your search to only Article
open access

8 GeV H- ions: Transport and injection

Description: Fermilab is working on the design of an 8 GeV superconducting RF H{sup -} linac called the Proton Driver. The energy of H{sup -} beam will be an order of magnitude higher than the existing ones. This brings up a number of technical challenges to transport and injection of H{sup -} ions. This paper will focus on the subjects of stripping losses (including stripping by blackbody radiation, field and residual gas) and carbon foil stripping efficiency, along with a brief discussion on other issues … more
Date: May 1, 2005
Creator: Chou, W.; Bryant, H.; Drozhdin, A.; Hill, C.; Kostin, M.; Macek, R. et al.
Item Type: Refine your search to only Article
captions transcript

9-11 Commission Hearing #2, May 22, 2003, Part 1

Description: Recording of the second public hearing held by the National Commission on Terrorist Attacks Upon the United States on May 22, 2003 at the Hart Senate Office Building in Washington, D.C. This hearing addresses four topics, which include the commission mandate and objectives, intelligence oversight and the joint inquiry, affected constituencies, and the state of civil aviation security on September 11th. This section includes the first panel on the commission mandate and objectives, with testimon… more
Date: May 22, 2003
Duration: 52 minutes 43 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
captions transcript

9-11 Commission Hearing #2, May 22, 2003, Part 2

Description: Recording of the second public hearing held by the National Commission on Terrorist Attacks upon the United States on May 22, 2003 at the Hart Office Senate Building in Washington, D.C. This hearing addresses four topics, which include the commission mandate and objectives, intelligence oversight and the joint inquiry, affected constituencies, and the state of civil aviation security on September 11th. This section includes the second panel on intelligence oversight and the joint inquiry with t… more
Date: May 22, 2003
Duration: 1 hour 34 minutes 46 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
captions transcript

9-11 Commission Hearing #2, May 22, 2003, Part 3

Description: Recording of the second public hearing held by the National Commission on Terrorist Attacks upon the United States on May 22, 2003 at the Hart Senate Office Building in Washington, D.C. This hearing addresses four topics, which include the commission mandate and objectives, intelligence oversight and the joint inquiry, affected constituencies, and the state of civil aviation security on September 11th. This section contains the third panel on affected constituencies with testimony from Senators… more
Date: May 22, 2003
Duration: 1 hour 23 minutes 23 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
captions transcript

9-11 Commission Hearing #2, May 22, 2003, Part # 4

Description: Recording of the second public hearing held by the National Commission on Terrorist Attacks upon the United States on May 22, 2003 at the Hart Senate Office Building in Washington, D.C. This hearing addresses four topics, which include the commission mandate and objectives, intelligence oversight and the joint inquiry, affected constituencies, and the state of civil aviation security on September 11th. This section includes the panel on civil aviation security with testimony from representative… more
Date: May 22, 2003
Duration: 2 hours 45 minutes 13 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
captions transcript

9-11 Commission Hearing #2, May 23, 2003, Part 1

Description: Recording of the second public hearing held by the National Commission on Terrorist Attacks upon the United States on May 23 in Washington, D.C. This hearing addresses four topics, which include the commission mandate and objectives, intelligence oversight and the joint inquiry, affected constituencies, and the state of civil aviation security on September 11th. This section includes the panel on civil aviation security, with testimony from Norman Mineta, Major General Craig McKinley, and Lieut… more
Date: May 23, 2003
Duration: 2 hours 6 minutes 47 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
captions transcript

9-11 Commission Hearing #2, May 23, 2003, Part 2

Description: Recording of the second public hearing held by the National Commission on Terrorist Attacks upon the United States on May 23, 2003 in Washington, D.C. This hearing addresses four topics, which include the commission mandate and objectives, intelligence oversight and the joint inquiry, affected constituencies, and the state of civil aviation security on September 11th. This section concludes the panel on civil aviation security, with testimony from Stephen McHale, Major General O.K. Steele, and … more
Date: May 23, 2003
Duration: 2 hours 31 minutes 29 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
captions transcript

9-11 Commission Hearing #11, May 18, 2004, Part 1

Description: Recording of the eleventh public hearing held by the National Commission on Terrorist Attacks upon the United States on May 18, 2004 at New School University in New York City. The two-day hearing examined the response of local and federal emergency response departments on September 11, 2001, and considered how to improve these critical functions in the event of future terrorist attacks. Two staff statements were presented during the course of the hearing. This section includes the staff stateme… more
Date: May 18, 2004
Duration: 1 hour 25 minutes 06 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
captions transcript

9-11 Commission Hearing #11, May 18, 2004, Part 2

Description: Recording of the eleventh public hearing held by the National Commission on Terrorist Attacks upon the United States on May 18, 2004 at New School University in New York City. The two-day hearing examined the response of local and federal emergency response departments on September 11, 2001, and considered how to improve these critical functions in the event of future terrorist attacks. Two staff statements were presented during the course of the hearing. This section includes the first panel, … more
Date: May 18, 2004
Duration: 1 hour 32 minutes 40 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
captions transcript

9-11 Commission Hearing #11, May 18, 2004, Part 3

Description: Recording of the eleventh public hearing held by the National Commission on Terrorist Attacks upon the United States on May 18, 2004 at New School University in New York City. The two-day hearing examined the response of local and federal emergency response departments on September 11, 2001, and considered how to improve these critical functions in the event of future terrorist attacks. Two staff statements were presented during the course of the hearing. This section includes the second panel … more
Date: May 18, 2004
Duration: 1 hour 42 minutes 01 second
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
captions transcript

9-11 Commission Hearing #11, May 18, 2004, Part 4

Description: Recording of the eleventh public hearing held by the National Commission on Terrorist Attacks upon the United States on May 18, 2004 at New School University in New York City. The two-day hearing examined the response of local and federal emergency response departments on September 11, 2001, and considered how to improve these critical functions in the event of future terrorist attacks. Two staff statements were presented during the course of the hearing.This section includes the beginning of t… more
Date: May 18, 2004
Duration: 1 hour 23 minutes 52 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
captions transcript

9-11 Commission Hearing #11, May 19, 2004, Part 1

Description: Recording of the eleventh public hearing held by the National Commission on Terrorist Attacks upon the United States on May 18, 2004 at New School University in New York City. The two-day hearing examined the response of local and federal emergency response departments on September 11, 2001, and considered how to improve these critical functions in the event of future terrorist attacks. Two staff statements were presented during the course of the hearing.This section includes the staff statemen… more
Date: May 18, 2004
Duration: 30 minutes 13 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
captions transcript

9-11 Commission Hearing #11, May 19, 2004, Part 2

Description: Recording of the eleventh public hearing held by the National Commission on Terrorist Attacks upon the United States on May 18, 2004 at New School University in New York City. The two-day hearing examined the response of local and federal emergency response departments on September 11, 2001, and considered how to improve these critical functions in the event of future terrorist attacks. Two staff statements were presented during the course of the hearing. This section includes testimony from fo… more
Date: May 19, 2004
Duration: 1 hour 54 minutes 19 seconds
Creator: National Commission on Terrorist Attacks upon the United States
Item Type: Refine your search to only Video
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