The UCO/Lick Detector Development Lab has tested MIT/Lincoln Labs CCID20 2Kx4K CCDs as part of the detector development consortium established by Gerry Luppino at the University of Hawaii. The following list of devices have been tested in phase 2 (and a few remaining from phase 1). Each entry in the list references a report on our findings. There is also a summary table of tested characteristics for the CCDs. Here is a drawing of the packaged device. All lab tests have been performed by Mingzhi Wei.
W12C1 One more phase 1
CCD. A very hot pixel makes this device more difficult to use, but proper
clocking may make it useful. We've used it for a number of tests to determine
if UV flood can reduce the "brick wall" QE variations.
W16C2 A standard epi CCD with reduced brick
wall and a very bright column.
W18C2 A very nice epi CCD.
W62C2 The first
device tested with the new and improved boron implant/laser anneal process.
This device shows real improvements in QE uniformity.
W67C1 This
device was tested by MIT/LL during phase 1 and was given a grade of C.
Our tests confirm this rating and show many hot columns.
W88C1 An interpoly short and type 3 brick
wall make this a test-grade CCD only.
W88C2 A nice CCD except for the type 3 brick
wall.
W90C2 The first
of the phase 2 CCDs with the improved backside processing. For some reason
this device exhibits poorer than usual serial CTE. We haven't seen this
problem in any previous CCID20 or in the other phase 2 devices recently
tested (W91C2 and W93C1).
W91C2 Another phase 2 CCD. It is very similar
to W90C2, except it has good serial CTE.
W93C1 Another excellent phase 2 CCD.
W93C2 One one amplifier works.
W94C2 A standard epi CCD with bad (type
3) brick wall and slightly lower than normal serial CTE.
W97C2 A high resistivity CCD with reduced
brick wall pattern and nice red response, but with a high spatial-frequency
QE variation.
W105C2 A high resistivity CCD which suffered
a breaking while cooling for the first time.
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