GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 1/7 Overview of Data Taking Anders W. Borgland Science Verification, Analysis and Calibrations.

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Presentation transcript:

GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 1/7 Overview of Data Taking Anders W. Borgland Science Verification, Analysis and Calibrations aka the “Don't Shoot the Messenger” talk From the ROYAL Anders

GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 2/7 Vive la France – 14 Julliet ! From Eric From Warren et les Etats-Unis aussi…

GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 3/7 We are doing fine ! Fraction of ToT saturations: 0.21 % all events 0.05 % muons 0.31 % showers From Martin From Nico From Zach From Pisa (Michael et al)

GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 4/7 Really fine ! Wrong calibration constants applied for some towers From Hiro From Monica Tower in Pos#8Tower in Pos#9 From Mizuno

GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 5/7 From Dan Flath…

GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 6/7 What next?

GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 7/7 3-in-a-row TKR Trigger we want to find topology to maximize timing effects in TKR distributions Bits Muons usually produce trigger requests for all of the 16 allowed combinations of 3-in-a-row There is no way to know which of the 16 3-in-a-row is responsible for the trigger Bits Bits Trigger on top onlyTrigger on bottom only From Dario

GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 8/7 CAL trending/monitoring Hi rate (20 kHz, red), Big events (yellow) B/2 (blue) 27 (red) 29 (yellow) 28 volts (B/2, blue) From Dave

GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 9/7 Plane ● Base ● Min ● Max Top Plane = 35 Bottom Plane = 0 From Stefano and Claudia PDU Voltage

GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 10/7 Muon φ distribution From Francesco

GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 11/7 Example of Analysis linked to STR From Luis

GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 12/7 What should we do for Aug 29 Workshop? (1) Study MC generated with ACD + 8 towers –Anders will start that on Monday –Dario and Monica will help with initial checks before we release it to the group –Need to get familiar with ACD variables –Start thinking how we will set up tests using ROIs to do analysis that we could not do so far Present a list of distributions that capture geometrical dependencies since we can not spend too much time when the full LAT is assembled to learn all that –Francesco Loparco presented some good ones –They will change as we add more towers Show trending results for calibrations (function of time and per tower) –Would like to have a comprehensive presentation from both TKR and CAL Alignment –Tracy kindly accepted the role to coordinate the effort to produce inter and intra- tower results using TKRrecon in its native framework –Probably this task will be for those with more expertise with SAS recon and usage of G4 propagator We presented results comparing data using different PDU voltages –How do we know they were set correctly? –Need to empower users to look at housekeeping data –Only SVAC group does that right now

GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 13/7 What should we do for Aug 29 Workshop? (2) Data Analysis from Special test Requests –Most likely 8 towers without ACD –Eduardo will lead the effort and has already started discussions with Hiro, Eric and Su Dong based on inputs from presentations in this meeting –As data becomes available we will post it in the IA list and discuss its quality on Friday meetings Propose a list of data taking configurations for the full LAT based on what we have learned so far –List should contain –Hardware configuration we want to test –Trigger settings –Number of events –Eduardo will send a message to science working group coordinators to request a list of instrumental effects they are worried about at the 1 and 10% level for on-orbit effects –We will iterate and see what is relevant for GND tests from the point of view functionality and performance

GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 14/7 Let’s write a little... Analysis Memo (in LAT Docs) –Crucial for documenting our effort –Essential for sharpening the thought process –It is a Live document –Should take a day to write »Can keep updating it »Benoit had a good example from GSI studies –Goal of the data analysis –State run ID’s –Trigger conditions –Hardware configuration –Analysis cuts –Assumptions behind analysis cuts –Does not need to be perfect !!! »It is not a journal publication Overall IA effort results due Dec 2005 –Eduardo and Nico will work on a draft

GLAST LAT Project IA Workshop 4 July 15, 2005 E. do Couto e Silva 15/7 We already miss you Dave Thank you Eric for the cartoon! Thanks for putting up with us for an entire year !!!!!!!!!!!