High-Flux X-Ray and Neutron Solution Scattering

AbstractHigh quality single crystal and polycrystalline CVD diamond detectors with platinum contacts have been tested at the white beam X28C beamline at the National Synchrotron Light Source under high-flux conditions. The voltage dependence of these devices has been measured under DC and pulsed-bias conditions, establishing the presence or absence of photoconductive gain in each device. Linear response has been achieved over eleven orders of magnitude when combined with previous low flux studies. Temporal measurements with single crystal diamond detectors have resolved the ns scale pulse structure of the NSLS.

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Iodixanol is readily eliminated by hemodialysis

Acta Radiologica ◽

10.1080/02841859809172447 ◽

1998 ◽

Vol 39 (4) ◽

pp. 372-374 ◽

Cited By ~ 7

Author(s):

K. J. Berg ◽

B. Rolfsen ◽

G. Stake

Keyword(s):

Blood Flow ◽

Contrast Medium ◽

Hollow Fiber ◽

Cellulose Triacetate ◽

High Flux ◽

Hollow Fiber Membranes ◽

Polysulfone Membrane ◽

Membrane Area ◽

X Ray

Purpose, Material and Methods, and Results: The dialyzability of the high-molecular X-ray contrast medium iodixanol was examined in an in vitro hemo-dialysis model using two different hollow fiber membranes: one high-flux (polysulfone) membrane and one intermediate-flux (cellulose triacetate) membrane. Blood flow was 200 ml/min and membrane area 1.3 m2. The dialyzer clearance of iodixanol dissolved in a mixture of leukocyte-filtered SAG-M blood and compatible citrate plasma was 134.2±3.6 ml/min for the polysulfone membrane and 113.0±3.6 ml/min for the cellulose triacetate membrane. Conclusion: Iodixanol is readily dialyzed through commercial high-flux membranes.

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Improvement of SAXS Lab Equipment by Using Scatterless Apertures

Acta Crystallographica Section A Foundations and Advances ◽

10.1107/s2053273314086690 ◽

2014 ◽

Vol 70 (a1) ◽

pp. C1330-C1330

Author(s):

Joerg Wiesmann ◽

Andreas Kleine ◽

Christopher Umland ◽

André Beerlink ◽

Juergen Graf ◽

...

Keyword(s):

Signal To Noise Ratio ◽

Experimental Setup ◽

High Flux ◽

Signal To Noise ◽

Minimum Diameter ◽

X Ray ◽

X Ray Scattering ◽

Wide Range ◽

Beam Stop ◽

Synchrotron Beamlines

Parasitic scattering caused by apertures is a well-known problem in X-ray analytics, which forces users and manufacturers to adapt their experimental setup to this unwanted phenomenon. Increased measurement times due to lower photon fluxes, a lower resolution caused by an enlarged beam stop, a larger beam defining pinhole-to-sample distance due to the integration of an antiscatter guard and generally a lower signal-to-noise ratio leads to a loss in data quality. In this presentation we will explain how the lately developed scatterless pinholes called SCATEX overcome the aforementioned problems. SCATEX pinholes are either made of Germanium or of Tantalum and momentarily have a minimum diameter of 30µm. Thus, these novel apertures are applicable to a wide range of different applications and X-ray energies. We will show measurements which were performed either at home-lab small angle X-ray scattering (SAXS) systems such as the NANOSTAR of Bruker AXS or at synchrotron beamlines. At the PTB four-crystal monochromator beamline at BESSY II data was collected for a comparison of conventional pinholes, scatterless Germanium slit systems and SCATEX pinholes. At the Nanofocus Endstation P03 beamline at PETRA III we compared the performance of our SCATEX apertures with conventional Tungsten slit systems under high flux density conditions.

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X-Ray Emission Induced by 60 keV High-Flux Copper Negative-Ion Implantation

Japanese Journal of Applied Physics ◽

10.1143/jjap.40.1094 ◽

2001 ◽

Vol 40 (Part 1, No. 2B) ◽

pp. 1094-1096 ◽

Cited By ~ 6

Author(s):

Hiroshi Amekura ◽

Vladimir Voitsenya ◽

Thi Thi Lay ◽

Yoshihiko Takeda ◽

Naoki Kishimoto

Keyword(s):

Ion Implantation ◽

Negative Ion ◽

High Flux ◽

X Ray

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High-flux table-top soft x-ray source driven by sub-2-cycle, CEP stable, 185-μm 1-kHz pulses for carbon K-edge spectroscopy

Optics Letters ◽

10.1364/ol.39.005383 ◽

2014 ◽

Vol 39 (18) ◽

pp. 5383 ◽

Cited By ~ 101

Author(s):

S. L. Cousin ◽

F. Silva ◽

S. Teichmann ◽

M. Hemmer ◽

B. Buades ◽

...

Keyword(s):

High Flux ◽

X Ray

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Spectral characterization of flash and high flux x-ray radiographic sources with a magnetic Compton spectrometer

Review of Scientific Instruments ◽

10.1063/5.0053184 ◽

2021 ◽

Vol 92 (8) ◽

pp. 083102

Author(s):

M. Espy ◽

M. Klasky ◽

M. James ◽

D. Moir ◽

J. Mendez ◽

...

Keyword(s):

Spectral Characterization ◽

High Flux ◽

X Ray

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Room-temperature X-ray response of cadmium–zinc–telluride pixel detectors grown by the vertical Bridgman technique

Journal of Synchrotron Radiation ◽

10.1107/s1600577519015996 ◽

2020 ◽

Vol 27 (2) ◽

pp. 319-328 ◽

Cited By ~ 3

Author(s):

Leonardo Abbene ◽

Fabio Principato ◽

Gaetano Gerardi ◽

Antonino Buttacavoli ◽

Donato Cascio ◽

...

Keyword(s):

Room Temperature ◽

Cadmium Zinc Telluride ◽

Photon Counting ◽

Zinc Telluride ◽

High Rate ◽

High Flux ◽

X Ray ◽

Pixel Detectors ◽

Vertical Bridgman ◽

Cadmium Zinc

In this work, the spectroscopic performances of new cadmium–zinc–telluride (CZT) pixel detectors recently developed at IMEM-CNR of Parma (Italy) are presented. Sub-millimetre arrays with pixel pitch less than 500 µm, based on boron oxide encapsulated vertical Bridgman grown CZT crystals, were fabricated. Excellent room-temperature performance characterizes the detectors even at high-bias-voltage operation (9000 V cm−1), with energy resolutions (FWHM) of 4% (0.9 keV), 1.7% (1 keV) and 1.3% (1.6 keV) at 22.1, 59.5 and 122.1 keV, respectively. Charge-sharing investigations were performed with both uncollimated and collimated synchrotron X-ray beams with particular attention to the mitigation of the charge losses at the inter-pixel gap region. High-rate measurements demonstrated the absence of high-flux radiation-induced polarization phenomena up to 2 × 106 photons mm−2 s−1. These activities are in the framework of an international collaboration on the development of energy-resolved photon-counting systems for high-flux energy-resolved X-ray imaging.

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