Development of a two-dimensional virtual-pixel X-ray imaging detector for time-resolved structure research

Orthen, A.; Wagner, H.; Martoiu, Sorin; Amenitsch, Heinz; Bernstorff, Sigrid; Besch, H.J.; Menk, R.H.; Nurdan, K.; Rappolt, Michael; Walenta, A.H.; Werthenbach, U.

doi:10.1107/s0909049503028863

Cited by 12 publications

(8 citation statements)

References 40 publications

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“…Eqs. (10)- (12)) and the derivatives between the coordinates (u, v) and (x, y). In this equation all appearing (u, v) should be treated as (u(x, y), v(x, y)).…”

Section: Spatial Resolutionmentioning

confidence: 99%

“…We have combined the readout structure with (optimised) MicroCAT gas gain structures [9,10] and a triple-GEM configuration [11]. In combination with the triple-GEM configuration this readout concept has already proven its possible application in biological and chemical diffraction measurements [12]. In principle this resistive interpolating readout structure can also be applied with vacuum devices like micro channel plates.…”

Section: Introductionmentioning

confidence: 99%

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On image reconstruction with the two-dimensional interpolating resistive readout structure of the Virtual-Pixel detector

Wagner

Orthen

Besch

et al. 2004

Nuclear Instruments and Methods in Physics Research Section A:

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The two-dimensional interpolating readout concept of the Virtual-Pixel detector (ViP detector) goes along with an enormous reduction of electronic channels compared to pure pixel devices. However, the special concept of the readout structure demands for adequate position reconstruction methods. Theoretical considerations reflecting the choice and the combination of linear algorithms with emphasis on correct position reconstruction and spatial resolution are presented. A subsequent two-dimensional coordinate transformation further improves the image response of the system. Measured images show how far the theoretical predictions of the simulations can be verified and to what extent they can be used to improve the position reconstruction.PACS: 29.40.Gx, 02.60.Cb

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“…Eqs. (10)- (12)) and the derivatives between the coordinates (u, v) and (x, y). In this equation all appearing (u, v) should be treated as (u(x, y), v(x, y)).…”

Section: Spatial Resolutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On image reconstruction with the two-dimensional interpolating resistive readout structure of the Virtual-Pixel detector

Wagner

Orthen

Besch

et al. 2004

Nuclear Instruments and Methods in Physics Research Section A:

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show abstract

“…As shown at the bottom right, the readout structure is divided into square resistive pads, with a readout node at each corner; measurement of the signal charge at each corner will permit localization of the center-ofgravity of the event to a fraction of the 4 mm side. The method of multiple readout, and recent developments regarding replacement of the MicroCAT with GEMs, are described by Orthen et al (2004).…”

Section: Figurementioning

confidence: 99%

Gas-based detectors for synchrotron radiation

Smith¹

2006

J Synchrotron Radiat

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Gas-filled detectors have played an important role in experiments at synchrotron sources for many years. Although other X-ray detection technologies are gaining wider use, particularly with the higher flux of new sources, gas-filled detectors are still well suited for specific experiments. This article describes some fundamental characteristics of gas-filled detectors for X-ray detection, with emphasis on position encoding, position resolution and linearity. Recently developed micropattern structures for achieving electron multiplication are described. Some applications of conventional wire chambers and micro-pattern detectors are given.

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“…The rapid development of new detectors with large dynamic range for high photon counting rates, which can be used for timeresolved structure research down to the µs time domain [28,29] should improve significantly the output of such experiments. The rapid development of new detectors with large dynamic range for high photon counting rates, which can be used for timeresolved structure research down to the µs time domain [28,29] should improve significantly the output of such experiments.…”

Section: Q328mentioning

confidence: 99%

X-ray scattering: a wonderful tool to probe lattice strains in materials with small dimensions

Thomas¹,

Loubens²,

Gergaud³

2004

MRS Proc.

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X-ray diffraction was recognized from the early days as highly sensitive to atomic displacements. Indeed structural crystallography has been very successful in locating with great precision the position of atoms within an individual unit cell. In disordered systems it is the average structure and fluctuations about it that may be determined. In the field of mechanics diffraction may thus be used to evaluate elastic displacement fields. In this short overview we give examples from recent work where x-ray diffraction has been used to investigate average strains in lines, films or multilayers. In small objects the proximity of surfaces or interfaces may create very inhomogeneous displacement fields. X-ray scattering is again one of the best methods to determine such distributions. The need to characterize displacement fields in nanostructures together with the advent of third generation synchrotron radiation sources has generated new and powerful methods (anomalous diffraction, coherent diffraction, microdiffraction, …). We review some of the recent and promising results in the field of strain measurements in small dimensions via X-ray diffraction. INTRODUCTIONSince the beginning of the nineties condensed matter physics has been increasingly concerned with properties of nm size objects. This trend is not simply a consequence of the steady miniaturization in electron devices [1]. It is also a result of fundamental discoveries, which show that new physical (magnetic, electronic, mechanical, …) properties appear at this scale. The search for specific size effects on physical properties should not shadow the influence of extremely high elastic strains inherent to these scales. Indeed it is now well established that materials in small dimensions [2] can sustain extremely high elastic strains. X-ray diffraction (XRD) has been recognized from the very early days [3,4] as a very sensitive tool to investigate lattice spacings and thus displacement fields. Homogeneous strains can be determined in a straightforward manner in ultrathin layers using synchrotron radiation. Strain fields are, however, Mater. Res. Soc. Symp. Proc. Vol. 840

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Development of a two-dimensional virtual-pixel X-ray imaging detector for time-resolved structure research

Cited by 12 publications

References 40 publications

On image reconstruction with the two-dimensional interpolating resistive readout structure of the Virtual-Pixel detector

On image reconstruction with the two-dimensional interpolating resistive readout structure of the Virtual-Pixel detector

Gas-based detectors for synchrotron radiation

X-ray scattering: a wonderful tool to probe lattice strains in materials with small dimensions

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