Speaker
Dr
Jon Lapington
(Space Research Centre, University of Leicester)
Description
The performance and operational advantages of using electronic image
readouts in image intensifiers, such as their simplicity, flexible
format, low noise, and capability for high spatial and temporal
resolution, are offset by the practical issues of housing them
within the detector vacuum enclosure. They commonly require
oversized, non-standard vacuum enclosures, multiple low noise
electronic ultra high vacuum (UHV) feed-throughs, need to be
manufactured in UHV suitable materials capable of being baked to
high temperatures, and are often difficult to re-use should a
failure occur during detector assembly, for example due to a vacuum
leak.
We describe an image intensifier utilizing the Image Charge
technique which eliminates the requirement for the electronic image
readout to be located within the vacuum enclosure. The Image Charge
technique utilizes a single resistive anode within the vacuum
enclosure to localize the event charge, while the charge signal is
capacitively coupled to the readout device through a dielectric
substrate which doubles as the rear wall of the vacuum enclosure.
We present results obtained using a generic intensifier design with
a variety of readout devices manufactured using standard multi-
layer PCB techniques, from a 50 ohm multi-element design optimized
for high speed operation to a four electrode multi-layer device
developed from the wedge and strip anode with enhanced image
resolution. The benefits of this intensifier design are discussed
and a readout scheme with integrated multi-channel ASIC based
electronics, which combines high spatial resolution at very high
count rates, is proposed
Primary author
Dr
Jon Lapington
(Space Research Centre, University of Leicester)
