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Holographic optical elements for the extreme-ultravioletregime

Description: As the development of extreme ultraviolet (EUV) lithography progresses, interest grows in the extension of traditional optical components to the EUV regime. The strong absorption of EUV by most materials and its extremely short wavelength, however, makes it very difficult to implement many components that are commonplace in the longer wavelength regimes. One such component is the diffractive optical element used, for example, in illumination systems to efficiently generate modified pupil fills.… more
Date: August 14, 2006
Creator: Naulleau, Patrick P.; Salmassi, Farhad; Gullikson, Eric M. & Anderson, Erik H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Mask inspection microscopy with 13.2 nm table-top laser illumination

Description: We report the demonstration of a reflection microscope that operates at 13.2-nm wavelength with a spatial resolution of 55 {+-} 3 nm. The microscope uses illumination from a table-top EUV laser to acquire aerial images of photolithography masks with a 20 second exposure time. The modulation transfer function of the optical system was characterized.
Date: October 14, 2008
Creator: Brizuela, Fernando; Wang, Yong; Brewer, Courtney A.; Pedaci, Francesco; Chao, Weilun; Anderson, Erik H. et al.
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Partner: UNT Libraries Government Documents Department
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Onset of Convection in Two Liquid Layers with Phase Change

Description: We perform linear stability calculations for horizontal fluid bilayers that can undergo a phase transformation, taking into account both buoyancy effects and thermocapillary effects in the presence of a vertical temperature gradient. We compare the familiar case of the stability of two immiscible fluids in a bilayer geometry with the less-studied case that the two fluids represent different phases of a single-component material, e.g., the water-steam system. The two cases differ in their interf… more
Date: September 14, 2006
Creator: McFadden, G B; Coriell, S R; Gurski, K F & Cotrell, D L
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Partner: UNT Libraries Government Documents Department
open access

Picosecond 14.7 nm interferometry of high intensity laser-produced plasmas

Description: We have developed a compact, 14.7 nm, sub-5 ps x-ray laser source at LLNL together with a Mach-Zehnder type Diffraction Grating Interferometer built at Colorado State University for probing dense, high intensity laser-produced plasmas. The short wavelength and pulse length of the probe reduces refraction and absorption effects within the plasma and minimizes plasma motion blurring. This unique diagnostic capability gives precise 2-D density profile snapshots and is generating new data for rapid… more
Date: October 14, 2004
Creator: Dunn, J.; Filevich, J.; Smith, R. F.; Moon, S. J.; Rocca, J. J.; Keenan, R. et al.
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Partner: UNT Libraries Government Documents Department
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Optimization for Single-Spike X-Ray FELs at LCLS with a Low Charge Beam

Description: The Linac Coherent Light Source is an x-ray free-electron laser at the SLAC National Accelerator Laboratory, which is operating at x-ray wavelengths of 20-1.2 Angstrom with peak brightness nearly ten orders of magnitude beyond conventional synchrotron radiation sources. At the low charge operation mode (20 pC), the x-ray pulse length can be <10 fs. In this paper we report our numerical optimization and simulations to produce even shorter x-ray pulses by optimizing the machine and undulator s… more
Date: December 14, 2011
Creator: Wang, L.; Ding, Y. & Huang, Z.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Performance of "Moth Eye" Anti-Reflective Coatings for Solar Cell Applications

Description: An inexpensive, effective anti-reflective coating (ARC) has been developed at the University of Florida to significantly enhance the absorption of light by silicon in solar cells. This coating has nano-scale features, and its microstructure mimics that of various night active insects (e.g. a moth's eye). It is a square array of pillars, each about 700 nm high and having a diameter of about 300 nm. Samples of silicon having this coating were exposed either to various combinations of either eleva… more
Date: March 14, 2011
Creator: Clark, E.; Kane, M. & Jiang, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Generation of Coherent X-Ray Radiation Through Modulation Compression

Description: In this letter, we propose a scheme to generate tunable coherent X-ray radiation for future light source applications. This scheme uses an energy chirped electron beam, a laser modulators, a laser chirper and two bunch compressors to generate a prebunched kilo-Ampere current electron beam from a few tens Ampere electron beam out of a linac. The initial modulation energy wavelength can be compressed by a factor of 1 + h{sub b}R{sub 56}{sup a} phase space, where h{sub b} is the energy bunch lengt… more
Date: December 14, 2010
Creator: Qiang, Ji & Wu, Juhao
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

In service design by simulations

Description: Irradiation of materials by energetic particles (e.g. electrons, ions and neutrons) is associated with very high internal power dissipation, which can drive the underlying nano- and microstructure far from normal equilibrium conditions. One of the most unusual responses in this connection is the ability of the material's nano- and microstructure to self-assemble in well-organized, two- and three-dimensional periodic arrangements. We reviewed and assessed experimental evidence and theoretical mo… more
Date: March 14, 2004
Creator: Ghoniem, Nasr H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Observation of a multiply ionized plasma with index of refraction greater than one

Description: We present clear experimental evidence showing that the contribution of bound electrons can dominate the index of refraction of laser created plasmas at soft x-ray wavelengths. We report anomalous fringe shifts in soft x-ray laser interferograms of Al laser-created plasmas. The comparison of measured and simulated interferograms show that this results from the dominant contribution of low charge ions to the index of refraction. This usually neglected bound electron contribution can a.ect the pr… more
Date: October 14, 2004
Creator: Filevich, J.; Rocca, J. J.; Marconi, M. C.; Moon, S. J.; Nilsen, J.; Scofield, J. H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

On the Metastable Level in Ni-like Ions

Description: The lowest excited level in Ni-like ions, 3d{sup 9}4s {sup 3}D{sub 3}, decays only via a magnetic octupole (M3) decay. They present calculated values of transition wavelengths and rates for ions with 30 {le} Z {le} 100. They have observed this line in Xe{sup 26+}, using the Livermore EBIT-I electron beam ion trap and a microcalorimeter, as well as a high-resolution flat-field grating spectrometer.
Date: September 14, 2004
Creator: Träbert, E.; Beiersdorfer, P.; Brown, G. V.; Terracol, S. & Safronova, U. I.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Radiation Spectrum Statistics in a High-Gain Free-Electron Laser at 266 nm

Description: High Gain Harmonic Generation FEL is in operations at the DUV-FEL facility (BNL). During HGHG FEL characterization we have measured a set of data demonstrating basic properties of the FEL radiation and compared them with analytic calculations [1]. This paper describes continuation of characterization of the HGHG FEL radiation output, based on the spectral measurements. We discuss analysis of an experiment at which the tunability concept of a seeded FEL with a fixed seed wavelength has been veri… more
Date: December 14, 2005
Creator: Shaftan, T.; Sheehy, B.; Yu, L. H.; Murphy, J. B.; Krinsky, S.; Rose, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Coherent Compton Backscattering High Gain FEL using an X-Band Microwave Undulator

Description: High power microwave sources at X-Band, delivering 400 to 500 of megawatts for about 400 ns, have been recently developed. These sources can power a microwave undulator with short period and large gap, and can be used in short wavelength FELs reaching the nm region at a beam energy of about 1 GeV. We present here an experiment designed to demonstrate that microwave undulators have the field quality needed for high gain FELs.
Date: December 14, 2005
Creator: Tantawi, S.; Dolgashev, V.; Nantista, C.; Pellegrini, C.; Rosenzweig, J. & Travish, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Incoherent and coherent beamstrahlung at the ILC

Description: This proposal is part of a series of proposals, funded by the NSF and DOE, to develop novel, high wavelength methods to monitor the beam-beam interaction at the International Linear Collider.
Date: April 14, 2006
Creator: Bonvicini, G.; Cinabro, D. & Dubrovin, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Production Summary for Extended Barrel Module Fabrication at Argonne for the Atlas Tile Calorimeter.

Description: The Tile Calorimeter is one of the main hadronic calorimeters to be used in the ATLAS experiment at CERN [1,2]. It is a steel/scintillator sampling calorimeter which is built by stacking 64 segments in azimuth and 3 separate cylinders to provide a total structure whose length is approximately 12m and whose diameter is a little over 8.4m. It has a total weight of about 2630 metric tons. Important features of this calorimeter are: A minimum gap (1.5mm) between modules in azimuth; Pockets in the s… more
Date: November 14, 2007
Creator: Guarino, V.; Hill, N.; Petereit, E.; Skrzecz, F.; Wood, K.; Proudfoot, J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modified thermal-optical analysis using spectral absorption selectivity to distinguish black carbon from pyrolized organic carbon

Description: Black carbon (BC), a main component of combustion-generated soot, is a strong absorber of sunlight and contributes to climate change. Measurement methods for BC are uncertain, however. This study presents a method for analyzing the BC mass loading on a quartz fiber filter using a modified thermal-optical analysis method, wherein light transmitted through the sample is measured over a spectral region instead of at a single wavelength as the sample is heated. Evolution of the spectral light trans… more
Date: April 14, 2008
Creator: Hadley, Odelle L.; Corrigan, Craig E. & Kirchstetter, Thomas W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Microsensors for In-Situ, Real-Time Detection and Characterization of Toxic Organic Substances

Description: We have further developed and demonstrated the novel ORNL micro-calorimetric spectroscopy technique for the detections and characterization of toxic organic substances. In this technique target molecules were allowed to adsorb on the surface of sub-femtojoule sensitive micromechanical thermal detectors. The adsorption of molecules on the thermal detector surface causes a differential surface stress resulting in an initial ''trigger''. By exposing the thermal detector microstructure elements to … more
Date: May 14, 2001
Creator: Rajic, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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