<title>High-resolution cross delay line detectors for the GALEX mission</title>

Abstract

The GALEX instrument consists of a 50cm normal incidence mirror telescope in combination with a grism, and a dichroic beamsplitter system projecting images onto two detectors simultaneously. The objective of this instrument is to provide sensitive high resolution imaging (3 to 5 arc") of galaxies in two bandpasses (1350 -1800A and 1800 -3000A), with the option of modest resolution spectroscopy. We are currently developing the microchannel plate, delay line, sealed tube detectors for the Galaxy Evolution Explorer' (GALEX) mission to be launched in 2001. The specifications for the two detector systems for GALEX require a large 65mm circular format, with high spatial resolution (<30gm FWHM, 2200 x 2200 resolution elements) and good linearity (±50.tm), <1 event cm2 sec background and counting rates of 1 .25 x i05 events sec . One detector covers the

Multiple hit readout of a microchannel plate detector with a three-layer delay-line anode

“…This is due to an inherent center-of-gravity averaging on the anode. Position resolutions well below 50 m have been reported [11] and can be maintained for large-scale detectors [19]. The time resolution is well below one nanosecond.…”

Cross strip imaging anodes for microchannel plate detectors

“…1) [2] has some of the design attributes of our current MCP readout scheme, the cross delay line (XDL) anode [3]. XS anode designs have two orthogonal sets of conductive strips, one for and one for position encoding.…”

Microchannel plate detector technology potential for LUVOIR and HabEx

“…The latter can take many forms, however, we have significant efficacy with readouts that are patterns of conductive strips in both the X and Y directions. Determination of the single event X and Y positions can be achieved with pulse arrival time differences at the end of delay lines (cross delay line (XDL) anodes 4 ) or from the centroid of the charge footprint sampled by a cross strip anode (XS) 9,10 . Time tagging of events to < 100 ps 1,11 , and position resolution < 20 µm 3,9,12 can be achieved with such readouts.…”

“…Photon counting, imaging microchannel plate (MCP) sensors are widely used in astronomy, high energy physics and remote sensing applications [1][2][3][4][5][6][7][8] . Sensing of photons, charged particles, and neutrons can be accomplished using high detection efficiency photocathodes 8 in open faced detectors (< 110nm range) or in ultra-high vacuum sealed tube devices (>110nm range).…”