Difference between revisions of "AIOP Apr. 8, 2024"

Latest revision as of 16:04, 9 April 2024

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AIOP - Polarized Photon Source

Agenda:

Previous Meeting
Announcements
Project Progress
- Data mining/preparation
- GitHub AIOP Project (AIOP-Photon issues)
- Task assignments (FTE Profiles)
PIER Activities
- Middle School Data Science Hackathon Workshop
- HUGS mini-Workshop
AOT

Minutes

Attendees: David L., Thomas B., Torri J., Patrick M., Jiawei G., Cristiano F., Malachi S., Armen K.

Some of our data needed to be moved out of /group/halld by request from Alex A. The disk was getting full.
- Some of the files were old Hydra models
- Wiki needs to be updated with new location of AIOP-relevant files

Jiawei showed some slides
- Statistics for identified nudge events for 3 run periods were shown
- Criteria for identifying nudge events reviewed
- Primary mechanism is to look for changes in the setpoint values
- Most nudge events happened within 5 minutes just before starting a run
  - Some run periods had 30-40 nudge events identified during a run
- Hovanes noted:
  - The pitch and yaw values will not change when switching between amorphous and diamond (only roll, x, y)
  - Radiator ID should be used to identify whether we switched to another diamond
  - There are "fast" and "slow" nudging buttons which correspond to step sizes that differ by about a factor of 10. The "fast" represents the larger step and will take a correspondingly longer time to complete.
  - It may take around 6 weeks to 2 months to damage a spot on a diamond enough to move to a different location
    - This is decided by the Run Coordinator and typically is based on the sharpness of the coherent edge and the availability of fresh areas on the diamond.

Patrick showed some slides
- Focused on Spring 2023 data
- Extensive discussion on what mySampler is doing, nudge criteria, etc.
- The statistics for identified nudge events differed from what Jiawei was seeing for other data sets.
  - Patrick suggested running his algorithm on the Spring 2020 data set in order to compare with results from Jiawei's identifier on the same data set.

Action Items

Update wiki with new file locations after having to move them from /group/halld (Torri)
Send link to mySampler manual (Hovanes)
Compare nudge event identifiers for Spring 2020 data (Patrick, Jiawei)

@@ Line 66: / Line 66: @@
 === Minutes ===
-Attendees: Thomas B., Torri J., Patrick M., Jiawei G., Cristiano F., Malachi S., Armen K.
+Attendees: David L., Thomas B., Torri J., Patrick M., Jiawei G., Cristiano F., Malachi S., Armen K.
-* Malachi introduced Armen Kasparian from the Data Science Dept. who will be working with us on this project
+* Some of our data needed to be moved out of /group/halld by request from Alex A. The disk was getting full.
+** Some of the files were old Hydra models
+** Wiki needs to be updated with new location of AIOP-relevant files
-* Torri, Patrick, and Jiawei met/communicated to coordinate the data preprocessing efforts.
+* Jiawei showed some [[Media:2024.04.08.AIOP_Guo.pdf|slides]]
+** Statistics for identified nudge events for 3 run periods were shown
+** Criteria for identifying nudge events reviewed
+** Primary mechanism is to look for changes in the setpoint values
+** Most nudge events happened within 5 minutes just before starting a run
+*** Some run periods had 30-40 nudge events identified during a run
+** Hovanes noted:
+*** The pitch and yaw values will not change when switching between amorphous and diamond (only roll, x, y)
+*** Radiator ID should be used to identify whether we switched to another diamond
+*** There are "fast" and "slow" nudging buttons which correspond to step sizes that differ by about a factor of 10. The "fast" represents the larger step and will take a correspondingly longer time to complete.
+*** It may take around 6 weeks to 2 months to damage a spot on a diamond enough to move to a different location
+**** This is decided by the Run Coordinator and typically is based on the sharpness of the coherent edge and the availability of fresh areas on the diamond.
-* Data Preprocessing (Patrick)
+* Patrick showed some [[Media:2024.04.08.AIOP_Moran.pdf|slides]]
-** Patrick showed some [[Media:2024.03.25.aiop_moran.pdf|slides]].
+** Focused on Spring 2023 data
-** Looking at GlueX Phase II (Spring 2023) and CPP (Summer 2022) data
+** Extensive discussion on what mySampler is doing, nudge criteria, etc.
-** Both periods used the same 50um diamond
+** The statistics for identified nudge events differed from what Jiawei was seeing for other data sets.
-** Extracted data from EPICS archive in 1sec steps
+*** Patrick suggested running his algorithm on the Spring 2020 data set in order to compare with results from Jiawei's identifier on the same data set.
-*** Dropped steps with missing info
-*** First attempt to identify some nudge events within data set
-*** Applied energy map to TAGM and TAGH scalers
-**** Some question as to what the "amorphous scalers" represented
-*** Applied standard fit to scaler spectra to identify coherent edge and extract polarization
-*** David asked if data points were interpolations or actual measurements. Patrick will look into it.
-* Data Preprocessing (Jiawei)
-** Jiawei showed some [[Media:2024.03.25.aiop_guo.pdf|slides]].
-** Looking at Spring 2018, Fall 2018, and Spring 2020 data.
-** Able to identify nudge events from pitch/yaw settings in EPICS archive
-** Extracted from archive and converted to CSV format
-*** Included integrated beam current
-** Some discussion on how to get beam position on diamond using beam position monitors and goniometer positon
-*** Ask Hovanes or possibly Richard how to obtain this
 ==== Action Items ====
-# Determine if mySampler returns interpolations between data measurements, or the measurements themselves (Patrick)
+# Update wiki with new file locations after having to move them from /group/halld (Torri)
-# Give some visuals indicating 30 seconds is a good amount of time to wait for the beam to ramp up and the coherent edge to stabilize (Patrick)
+# Send link to mySampler manual (Hovanes)
-# Get some information about nudge events: how many, when they happen, etc (Jiawei, Patrick)
+# Compare nudge event identifiers for Spring 2020 data (Patrick, Jiawei)
-# Diagram of tagger microscope and hodoscope (?)
-# Send link to amorphous subtraction code for online monitoring (David)
-# Find how to get beam position on diamond (Jiawei)
-# Place data in central location and document ('''/group/halld/AIOP/data''' - Torri, Patrick, Jiawei)