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@antilogus
antilogus committed Dec 10, 2024
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44 changes: 24 additions & 20 deletions sections/serialRemnants.rst
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Expand Up @@ -14,6 +14,7 @@ of the effect :

the first CCD line of the following exposure is ~ saturated and signal is also present in the 2nd line read of the CCD.
- in e2v CCD :

the effect is slightly amplifier dependent , still in most of
the device a saturation is observed in the first xx CCD line read of
the following exposure, and a
Expand All @@ -40,9 +41,12 @@ pockets at this image-serial register interface.

.. image:: /figures/plots_R12_S20_C15_E1880_bias_2024103000303.png
:target: ../figures/plots_R12_S20_C15_E1880_bias_2024103000303.png
:alt: Figure showing the impact of the various type of clear on a bias taken after a saturated flat for an E2V sensor. We present for 3 types of sequencer ( from left to right : V29 , NoP and NopSF), a zoom on the first lines of an e2v amplifier ( here R12_S20 C10) shown as a 2D image ( top
plots) and presented as the mean signal per line (bottom plots). A bias taken just after a saturated flat in a e2v CCD will show a residual signal in the first lines when using the default clear (left images,clear=v29 ) : the first line has an almost saturated signal ( ~ 100 kADU here),
and a significant signal is seen up to the line ~50 here. In practice, in function of the amplifier, signal can be seen up to line 20-50. When using the NoP clear (central plots), we can already see a strong reduction of the unclear charges still present in the first acquired bias after a saturated flat. The NoPSF clear fully clear the saturated flat , and no uncleared charges are observed in the following bias.
:alt: Figure showing the impact of the various type of clear on a bias taken after a saturated flat for an E2V sensor.



In the above image , we present for 3 types of sequencer ( from left to right : V29 , NoP and NopSF), a zoom on the first lines of an e2v amplifier ( here R12_S20 C10) shown as a 2D image ( top
plots) and presented as the mean signal per line (bottom plots). A bias taken just after a saturated flat in a e2v CCD will show a residual signal in the first lines when using the default clear (left images,clear=v29 ) : the first line has an almost saturated signal ( ~ 100 kADU here), and a significant signal is seen up to the line ~50 here. In practice, in function of the amplifier, signal can be seen up to line 20-50. When using the NoP clear (central plots), we can already see a strong reduction of the unclear charges still present in the first acquired bias after a saturated flat. The NoPSF clear fully clear the saturated flat , and no uncleared charges are observed in the following bias.



Expand All @@ -53,24 +57,24 @@ pockets at this image-serial register interface.
far . .

+------------------------+------------+----------+-------------+----------------+-----------------+-------------------------+--------+-------+
| | Default Clear | Multi Clear | Multi Clear | Deep Clear | No Pocket (NoP) | No Pocket Serial Flush (NoPSF) | Header 3 | Header 4 |
| | 1 Clear | 3 Clears | 5 Clears | Clear +1 Line | 1 Clear | 1 Clear | | |
| | (seq. V29 ) | (seq. V29 ) | (seq. V29 ) | (Seq. V23 DC) | (seq. V29_NoP) | ( seq. V29, V30 ) | | |
+===================+==========+==========+========+=============+==============+====================+======+======+
| Clear duration | 65.5 ms | 196.5 ms | 327.4 ms | 64.69 ms | 65.8 ms | 67 ms | | |
+------------------------+------------+------------+----------+----------------+-------------+----------------------------------+-------+---------+
| "E2V" after saturated Flat | | | | | | | | |
+------------------------+------------ + | +----------------+-------------+----------------------------+-------+---------+
| R30_S10_C10 E2V | | | | | | | | |
| Bright Column (~ sat. Star) | | No residual e- | No residual e- | | | | | |
+------------------------+------------+ + +----------------+-------------+----------------------------------+-------+---------+
| | Default Clear | Multi Clear | Multi Clear | Deep Clear | No Pocket (NoP) | No Pocket Serial Flush (NoPSF) | Header 3 | Header 4 |
| | 1 Clear | 3 Clears | 5 Clears | Clear +1 Line | 1 Clear | 1 Clear | | |
| | (seq. V29 ) | (seq. V29 ) | (seq. V29 ) | (Seq. V23 DC) | (seq. V29_NoP) | ( seq. V29, V30 ) | | |
+===================+==========+==========+========+=============+==============+====================+======+======+
| Clear duration | 65.5 ms | 196.5 ms | 327.4 ms | 64.69 ms | 65.8 ms | 67 ms | | |
+------------------------+------------+------------+----------+----------------+-------------+----------------------------------+-------+---------+
| "E2V" after saturated Flat | | | | | | | | |
+------------------------+------------ + | +----------------+-------------+----------------------------+-------+---------+
| R30_S10_C10 E2V | | | | | | | | |
| Bright Column (~ sat. Star) | | No residual e- | No residual e- | | | | | |
+------------------------+------------+ + +----------------+-------------+----------------------------------+-------+---------+
| "ITL" after saturated Flat | | in following | in following | | | | | |
+------------------------+------------+ + +----------------+-------------+-----------------------------+-------+---------+
| R02_S20_C14 ITL | | image | image | | | | | |
|Bright Column (~ sat. Star) | | | | | | | | |
+------------------------+------------+------------+----------+----------------+-------------+----------------------------------+-------+---------+
| R01_S10 ITL "unique" | | | | | | | | |
+------------------------+------------+------------+----------+----------------+-------------+----------------------------------+-------+---------+
+------------------------+------------+ + +----------------+-------------+-----------------------------+-------+---------+
| R02_S20_C14 ITL | | image | image | | | | | |
|Bright Column (~ sat. Star) | | | | | | | | |
+------------------------+------------+------------+----------+----------------+-------------+----------------------------------+-------+---------+
| R01_S10 ITL "unique" | | | | | | | | |
+------------------------+------------+------------+----------+----------------+-------------+----------------------------------+-------+---------+



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