Study and application of hole structures as gas gain devices for two dimensional high rate X-ray detectors

Sarvestani, A.; Besch, H.J.; Junk, Michael; Meissner, Wassilios G.; Sauer, N.; Stiehler, Robert D.; Walenta, A.H.; Menk, R.H.

doi:10.1016/s0168-9002(98)00223-x

Cited by 38 publications

(22 citation statements)

References 8 publications

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“…The copper-clad bottom side of the GEM shields all currents induced by charge movements appearing above this electrode; especially the slow ions do not contribute to the signal shape, which is, however, the case for micromegas or MicroCAT detectors [24,25]. The crucial parameters for the width t w of the box-shaped current are the electron drift velocity v e in the electric field of the induction region and the distance d between the bottom side of the GEM and the anode which amounts to 1 mm in our case:…”

Section: Signal Length Investigationsmentioning

confidence: 99%

Gas gain and signal length measurements with a triple-GEM at different pressures of Ar-, Kr- and Xe-based gas mixtures1

Orthen

Wagner

Besch

et al. 2003

Nuclear Instruments and Methods in Physics Research Section A:

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Section: Signal Length Investigationsmentioning

confidence: 99%

Gas gain and signal length measurements with a triple-GEM at different pressures of Ar-, Kr- and Xe-based gas mixtures1

Orthen

Wagner

Besch

et al. 2003

Nuclear Instruments and Methods in Physics Research Section A:

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“…1 The small increase in counter-gas pressure from 2 to 2.5 Bar (that is in comparison with the breadboard instrument) will tend to offset this improvement as shown in pressure vs. resolution evaluations done for hole-structures. 10 For our application, good energy resolution is useful in maintaining image contrast, but not critical.…”

Section: The Electron Cloudmentioning

confidence: 99%

Integrated Detector Technology for Corrosion Inspection

Smith¹

2000

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REPORT DOCUMENTATION PAGEPublic reporting burden for this collection ol information is estimated to average 1 hour per response, including th< and maintaining the data needed, and completing and reviewing the collection of information. ABSTRACT (Maximum 200 words)This project investigated the use of gas micro-strip detectors as a means of improving the throughput of an innovative technique for detecting hidden corrosion in aging aircraft. The evaluations included the development of system, detector and data-readout concepts capable of meeting the resolution and throughput goals for this instrument, and the modeling and computation of x-ray and electron interactions in the detector.The results of this evaluation indicate that these detectors can be adapted to this application and can achieve the spatial resolution and count rates required to support a system throughput up to 25 m/hr for detection of 5% corrosion in lapjoints. This throughput, nearly two orders-of-magnitude faster than the existing demonstration system, is sufficient to support the use of this instrument as a practical adjunct to existing technologies. The next step in development would be the fabrication of this detector and the demonstration that the sensitivity and throughput targets can be achieved in a demonstration system.

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“…A detailed description of the detector has already been presented in earlier works (see Besch et al, 1997;Sarvestani et al, 1998a). Here, only the main features are brie¯y summarized.…”

Section: Detector Set-upmentioning

confidence: 99%

“…During this process primary charge is generated. In the constant drift ®eld (24 mm length) the ions are transported to the drift cathode, while the electrons are transported to the gas gain structure (MicroCAT; see Sarvestani et al, 1998a). The MicroCAT (supplied by Koenen Siebdrucktechnik, 85521 Ottobrunn, Germany) consists of a 55 mm-thick nickel foil perforated with microholes (116 mm diameter) in a hexagonal arrangement with a pitch of 164 mm.…”

Section: Detector Set-upmentioning

confidence: 99%

Biological X-ray diffraction measurements with a novel two-dimensional gaseous pixel detector

Sarvestani

Amenitsch

Bernstorff

et al. 1999

J Synchrotron Radiat

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In order to exploit the potential of modern X-ray diffraction studies to its full extent, a new generation of appropriate detectors is required. Here, a small prototype (28 Â 28 mm 2 active area) of a novel two-dimensional pixel detector is presented which satis®es most of the requirements. It is based on a gaseous single-photon counter with asynchronous readout and interpolating position encoding, combining the advantages of a pure pixel readout (high local and global rate capability) with those of a projecting readout (small number of channels). In order to demonstrate the suitability of this detector for X-ray diffraction applications, measurements at a synchrotron radiation source have been performed recording diffraction patterns from different biological samples (rat tail tendon collagen, phospholipid and protein crystal). These measurements have proven the good spatial resolution, the high intensity precision and the high local rate capability. Moreover, the single-photon readout was utilized in order to perform time-resolved measurements in the case of SAXS studies and to apply ®ne angular slicing in the case of protein crystallography. The detector has a high reliability and robustness, particularly when compared with conventional gaseous detectors, and the technology used can be easily extended to large active areas.

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Study and application of hole structures as gas gain devices for two dimensional high rate X-ray detectors

Cited by 38 publications

References 8 publications

Gas gain and signal length measurements with a triple-GEM at different pressures of Ar-, Kr- and Xe-based gas mixtures1

Gas gain and signal length measurements with a triple-GEM at different pressures of Ar-, Kr- and Xe-based gas mixtures1

Integrated Detector Technology for Corrosion Inspection

Biological X-ray diffraction measurements with a novel two-dimensional gaseous pixel detector

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