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

Orthen, A.; Wagner, H.; Martoiu, S.; Amenitsch, H.; Bernstorff, S.; Besch, H.-J.; Menk, R.-H.; Nurdan, K.; Rappolt, M.; Walenta, A.H.; Werthenbach, U.

doi:10.1107/S0909049503028863

Figure 1
Schematic cross section of the triple-GEM detector set-up. The sensitive area has a size of 56 mm × 56 mm, subdivided into 7×7 cells (the readout structure actually contains 9×9 cells, whereby the outermost cells are dummy cells). The drift cathode is typically supplied with a voltage of −4000 V, in combination with the (not shown) drift cage providing a homogeneous drift field of ∼1 kV cm⁻¹. The readout structure is at ground potential. The electric field between the individual GEMs is set to 2.5 kV cm⁻¹ and that between the undermost GEM and the readout structure to 3 kV cm⁻¹.

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 11| Part 2| February 2004| Pages 177-186

doi:10.1107/S0909049503028863

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