Skip to content

Commit

Permalink
Add completed section on bright pixels
Browse files Browse the repository at this point in the history
  • Loading branch information
seanmacb committed Dec 13, 2024
1 parent 104d1c5 commit 6ebcaff
Show file tree
Hide file tree
Showing 3 changed files with 13 additions and 1 deletion.
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Binary file modified figures/baselineCharacterization/run7PTCsToDate.jpg
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
14 changes: 13 additions & 1 deletion sections/baselineCharacterization.rst
Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,9 @@ Initial characterization studies performed on LSSTCam were used two primary acqu

All EO camera data is processed through the `calibration products <https://github.com/lsst/cp_pipe>`__ and `electro-optical <https://github.com/lsst-camera-dh/eo_pipe/tree/main>`__ pipelines to extract key metrics from the data run. The key camera metrics from Run 7, and their comparison to previous runs are discussed below.


The naming of the EO runs was established during initial camera integration and testing. The final SLAC IR2 run from November 2023 was named "Run 6", while the data acquisitions from Cerro Pachon are considered "Run 7." Additionally, individual EO acquisitions are tagged with a run identifier. This is commonly referred to a Run ID. For all SLAC runs, the run identifier was a five digit numeric code, while the Cerro Pachon runs were "E-numbers" that started with a capital E followed by a numeric code.

For comparison between Cerro Pachon EO runs and the final SLAC IR2, the following runs are used.

+------------+--------------+------------------+
Expand All @@ -34,7 +37,8 @@ For comparison between Cerro Pachon EO runs and the final SLAC IR2, the followin
| PTC | 13591 | E749 |
+------------+--------------+------------------+

Among all of these measurements, there is particular concern that they have not degraded between the SLAC IR2 run in November 2023 and the Cerro Pachon run in October 2024.

Among all of these measurements, primary concern is that the camera has maintained its performance standards between the SLAC IR2 run in November 2023 and the Cerro Pachon run in October 2024.


Bias metrics
Expand Down Expand Up @@ -81,6 +85,14 @@ In the context of LSSTCam, we extract bright pixels from the dark current, with
:target: /figures/baselineCharacterization/13557_E1071_BRIGHT_PIXELS.png
:alt: Figure showing the comparison between bright pixel measurements at SLAC and at Cerro Pachon

Reviewing the differences in bright pixels, we find consistent bright defect counts between Run 6 and Run 7. There appears to be a small excess of bright defects in Run 7.


.. image:: /figures/baselineCharacterization/13557_E1071_BRIGHT_PIXELS_diff.png
:target: /figures/baselineCharacterization/13557_E1071_BRIGHT_PIXELS_diff.png
:alt: The comparison between bright pixel measurements at SLAC and at Cerro Pachon, taking the differences between measurements on a per amp basis.

Taking the difference of defect counts on each amplifier, and separating the amplifiers by the detector manufacturer shows a small excess of bright defects in run 7 when compared to run 6. For ITL sensors, we find 12% of the amplifiers with more bright pixels than run 6. For E2V sensors, we find 4% of the amplifiers with more bright pixels than run 6. Despite this, the number of bright defects between runs does not increase for most sensors.


Stability flat metrics
Expand Down

0 comments on commit 6ebcaff

Please sign in to comment.