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| Describe Run74processing here. | = PIIC processing of run 74 beam maps (taken on 2025/07/13) = Three beam maps were taken on 2025/07/13, i.e. scans || Scan || Focus || Notes || || 20250713s45 || Ar2 || || || 20250713s47 || Ar1 || weird behavious in the IDL reduction by NP on 2025/07/15 || || 20250713s78 || Ar1 || although it's meant to be used for Ar3|| On 2025/07/17 SB processed the three beam maps using PIIC. Below here I copy the usual FOV plots, that show the quality of the beam maps. They are self-explanatory (cfr also the previous re-commissioning runs for more information). It is worth to point out few features, though: * also in this re-commissioning session, the Ar3 beam maps are bad. My feeling is that the main culprit is the focus offset of Ar3 with respect to Ar1 and Ar2. * there is a focus difference of ~0.3 mm between Ar2 and Ar1, a difference of ~0.3 mm between Ar1 and Ar3, and therefore a difference of ~0.6 mm between Ar2 and Ar3. These values are preliminary and come from the quick focus analysis carried out during the observing session. Note that during the first re-commissioning (run 72), Ar1 and Ar3 seemd to have a similar focus offset, but things changed after re-opnening. The idea is that this is not a real hardware change, but rather due to the fact that in run 72 the Box C was missing. In my opinion this is not so obvious, though. * the consequences of these focus offsets between the three arrays are that: focusing on Ar2, Ar3 is completely out of focus and not usable; fcusing on Ar1, Ar3 is still out of focus (but less dramatically) and only marginally usable. * there have been issues with focusing at 1.2 mm |
PIIC processing of run 74 beam maps (taken on 2025/07/13)
Three beam maps were taken on 2025/07/13, i.e. scans
Scan |
Focus |
Notes |
20250713s45 |
Ar2 |
|
20250713s47 |
Ar1 |
weird behavious in the IDL reduction by NP on 2025/07/15 |
20250713s78 |
Ar1 |
although it's meant to be used for Ar3 |
On 2025/07/17 SB processed the three beam maps using PIIC. Below here I copy the usual FOV plots, that show the quality of the beam maps. They are self-explanatory (cfr also the previous re-commissioning runs for more information). It is worth to point out few features, though:
- also in this re-commissioning session, the Ar3 beam maps are bad. My feeling is that the main culprit is the focus offset of Ar3 with respect to Ar1 and Ar2.
- there is a focus difference of ~0.3 mm between Ar2 and Ar1, a difference of ~0.3 mm between Ar1 and Ar3, and therefore a difference of ~0.6 mm between Ar2 and Ar3. These values are preliminary and come from the quick focus analysis carried out during the observing session. Note that during the first re-commissioning (run 72), Ar1 and Ar3 seemd to have a similar focus offset, but things changed after re-opnening. The idea is that this is not a real hardware change, but rather due to the fact that in run 72 the Box C was missing. In my opinion this is not so obvious, though.
- the consequences of these focus offsets between the three arrays are that: focusing on Ar2, Ar3 is completely out of focus and not usable; fcusing on Ar1, Ar3 is still out of focus (but less dramatically) and only marginally usable.
- there have been issues with focusing at 1.2 mm