High-resolution detection system for time-of-flight electron spectrometry

Abstract

One of the key components of a time of flight (TOF) spectrometer is the detection system. In addition to high timing resolution, accurate 2-dimensional imaging substantially broadens the areas of applications of TOF spectrometers; for example, add a new dimension to angle-resolved photoemission spectroscopy (ARpES).In this paper we report on the recent developments of a high spatial (<50 pm) and timing (<130 ps) resolution imaging system capable of selective detection of electrons, ions and/or photons. Relative to our previously reported results, we have substantially improved the counting rate capabilities of the system especially for cases where the energy range of interest represents a small fraction of the incoming flux at the detector " Corresponding author.

Microchannel plate detector technology potential for LUVOIR and HabEx

“…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. Background rates can be exceeding low (<0.05 events cm -2 sec -1 ) 13 , MCPs are inherently radiation hard and have low sensitivity to gamma ray flux 14 .…”

“…Background rates can be exceeding low (<0.05 events cm -2 sec -1 ) 13 , MCPs are inherently radiation hard and have low sensitivity to gamma ray flux 14 . Electronic readout MCP sensors have been used as photon counting, imaging, event time tagging detectors for a number of astronomical 8,15,16 , remote sensing 17 , time resolved biological imaging 18 , photoelectron emission spectroscopy 1 and night time sensing 19 applications. The development of large area, high performance, photon counting, imaging, timing detectors also has significance for "open faced" configurations for UV and particle detection in space astrophysics, mass spectroscopy and many time-of-flight applications.…”

“…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).…”

Large-format high-spatial resolution cross-strip readout MCP detectors for UV astronomy

“…Microchannel plate (MCP) imaging detector schemes [1][2][3][4][5][6][7][8] have been used in many NASA missions (e.g. FUSE, GALEX and COS on Hubble) as well as other non-astronomical applications.…”

Cross strip microchannel plate imaging photon counters with high time resolution

“…Microchannel plate (MCP) imaging detector schemes [1][2][3][4][5][6][7][8] have found extensive uses in many fields. We are developing a new generation of MCP detector using the Cross Strip (XS) anode.…”