Difference between revisions of "AIOP Apr. 22, 2024"

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=== Agenda: ===
 
=== Agenda: ===
−
# [[AIOP Mar. 25, 2024| Previous Meeting]]
+
# [[AIOP Apr. 8, 2024| Previous Meeting]]
 
#:
 
#:
 
# Announcements
 
# Announcements
Line 66: Line 66:
  
 
=== Minutes ===
 
=== Minutes ===
−
Attendees: David L., 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., Naomi J., 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.
+
* (Slides from last week need to be uploaded to minutes)
−
** Some of the files were old Hydra models
 
−
** Wiki needs to be updated with new location of AIOP-relevant files
 
  
−
* Jiawei showed some [[Media:2024.04.08.AIOP_Guo.pdf|slides]]
+
* Patrick showed some [[Media:2024.04.22.AIOP_moran.pdf|slides]]
−
** Statistics for identified nudge events for 3 run periods were shown
+
* Jiawei showed some [[Media:2024.04.22.AIOP_guo.pdf|slides]]
−
** 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 [[Media:2024.04.08.AIOP_Moran.pdf|slides]]
+
 
−
** Focused on Spring 2023 data
+
* First 10 days of Spring 2020 data identified nudge events comparison started
−
** Extensive discussion on what mySampler is doing, nudge criteria, etc.
+
** Some initial confusion on what period of time statistics produced from Patrick's and Jiawei's algorithms covered. This was sorted out and determined that they were roughly the same order of magnitude but will need to look offline to get exact numbers.
−
** The statistics for identified nudge events differed from what Jiawei was seeing for other data sets.  
+
* Some discussion on the maximum lag between pushing a nudge button and seeing the result. This is assumed to be 10 seconds.
−
*** 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.
+
** This is significant on how multiple nudges are combined into a single nudge event. (May be different in the two algorithms)
 +
** Naomi brought up what happens if beam goes down between pushing button and response. Patrick responded that the nudge events only end after the beam has been up for at least 30 seconds after the button was pressed.
 +
 
 +
* There was some more discussion on the "c" angle as defined in Livingston's paper.
 +
** Some clarification on how AI can be used here. Specifically, AI can use recent measurements of the coherent edge and possibly other environmental factors to predict the position of the edge at a point shortly in the future. This can them be used to calculate delta-c which the standard tools can translate into changes to the goniometer angle.
 +
** Patrick asked for the values/transformations that are used to convert a change in c into changes int the yaw and pitch angles.
  
 
==== Action Items ====
 
==== Action Items ====
−
# Update wiki with new file locations after having to move them from /group/halld (Torri)
+
# Update last meeting's minutes with slides from Patrick and Jiawei (David)
−
# Send link to mySampler manual (Hovanes)
+
# Add columns to appropriate dataframe for the edge position from start of run and from the nominal (Jiawei)
−
# Compare nudge event identifiers for Spring 2020 data (Patrick, Jiawei)
 

Latest revision as of 13:34, 6 May 2024

The current weekly meeting time is every other Monday at 13:00 US/Eastern

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AIOP - Polarized Photon Source

Agenda:

  1. Previous Meeting
  2. Announcements
  3. Project Progress
  4. PIER Activities
  5. AOT


Minutes

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

  • (Slides from last week need to be uploaded to minutes)


  • First 10 days of Spring 2020 data identified nudge events comparison started
    • Some initial confusion on what period of time statistics produced from Patrick's and Jiawei's algorithms covered. This was sorted out and determined that they were roughly the same order of magnitude but will need to look offline to get exact numbers.
  • Some discussion on the maximum lag between pushing a nudge button and seeing the result. This is assumed to be 10 seconds.
    • This is significant on how multiple nudges are combined into a single nudge event. (May be different in the two algorithms)
    • Naomi brought up what happens if beam goes down between pushing button and response. Patrick responded that the nudge events only end after the beam has been up for at least 30 seconds after the button was pressed.
  • There was some more discussion on the "c" angle as defined in Livingston's paper.
    • Some clarification on how AI can be used here. Specifically, AI can use recent measurements of the coherent edge and possibly other environmental factors to predict the position of the edge at a point shortly in the future. This can them be used to calculate delta-c which the standard tools can translate into changes to the goniometer angle.
    • Patrick asked for the values/transformations that are used to convert a change in c into changes int the yaw and pitch angles.

Action Items

  1. Update last meeting's minutes with slides from Patrick and Jiawei (David)
  2. Add columns to appropriate dataframe for the edge position from start of run and from the nominal (Jiawei)
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