Bye Bye LAT

ISOC/SVAC Instrument Analysis Meeting, May 12, 2006

Anders W. Borgland 1

Bye Bye LATBye Bye LAT

Anders W. Borgland

ScienceVerification,Analysis andCalibrations/ISOC

Last evening!



GoingGoing



Going ....Going ....



Going .....Going .....



Gone!Gone!

Cool truck over here!



ReprocessingReprocessing

• Reprocessing:– Hope to start reprocessing at the end of next week early next

week!– Will take at least a week to finish

– I have an RC-1:– Will debug it over the weekend ......

– With ACD calibrations in the code!– Finally! You will then get calibrated quantities in your

ntuples.– Recon.root:

– We will keep the recon.root files for this processing– Muon hypothesis:

– Will reprocess a subsample using the muon hypothesis» 10M Vertical + 10M Horizontal enough (Johann)?

– Context information:– Available in the SVAC ntuple

» Extended GEM counters etc– Need to write the documentation .....

• Will make MC for all data taking configurations.



Some Issues With The DataSome Issues With The Data

• Useful things to know about the data quality:– Linked from the main IA page– I will add more details:

– Most issues are with the extended counters• Merit ntuple problem:

– JIRA GRINF-29 January 31:– Run ID (and also Event ID) are floats in Merit– Get truncated for data run IDs– Thought this was fixed in EM, but it slipped through :-( – Thanks to Bill for discovering this!

– 'Fixed' in GR v9:– RunID and EventId are here integers– But not in current EM!

– Emergency solution:– Make them 'double'– Will work for the data we took in April/May

– Longer term solution:– Base EM on GR v9– Need to get GR to use Uint64_t:

» All extended counters like sequence number (EventID) are actually 64 bits



Gone But Not Forgotten!Gone But Not Forgotten!

Bye Bye LAT

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