Commissioning and running of sPHENIX

["W.A. Zajc" <zajc AT nevis.columbia.edu>]

Dear Anne:

Thanks for the clear guidelines, all of which make good sense.

All plots from now  on that plot x vs y should have the aspect ratio correct, and not just use the default canvas size.

Does this apply to calorimeter eta-phi tower maps? (I hope so - as my students know, a pet peeve of mine.)

Best regards,

Bill 

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W.A. Zajc
I.I. Rabi Professor of Physics
Columbia University
New York, NY 10027

https://blogs.cuit.columbia.edu/waz1/
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On Jun 6, 2024, at 7:48 AM, Anne Sickles <sickles AT illinois.edu> wrote:

Hello All Subsystems,


Today we expect no-beam /  maybe APEX day.    We would like to request  that subsystems (not including the TPC)  focus a part of their SCM reports today and Friday on noting major issues, whether we are taking good physics data with the subsystem,  how they know that, and timescale for  fixes.   Linking  a few (3-4 max) from the SCM google doc is fine.

Also, people are working hard and there are challenging, puzzling problems.    In such cases, it  is best practice to  take the time to label axes,  have the number number included, remove superfluous stat boxes, label the z-axis and make sure the numbers are visible on the color scale (pick a color scale that works). All plots from now  on that plot x vs y should have the aspect ratio correct, and not just use the default canvas size.    Plots should identify which data are being plotted.

This may seem like  busy work, but it can make a huge difference in debugging problems and saving everyone time.   The online monitoring is a good place  to start -- for example if the hit rate < 0.5  of expected,  that is not "dead".  Maybe one more category should be for < 0.01  with a different color. TPC (for example) figures  of x versus z should  have the real aspect ratio. There are many examples and many root plotting experts around; we are happy to help.

Sincerely,

Jamie and Anne

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Anne Sickles
Professor
University of Illinois at Urbana Champaign
sickles AT illinois.edu
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