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Hi Norman,

On the calorimeter, we did lower seed/cluster threshold from 100/200 to 50/100 MeV
from pass0 to pass1.   And the ecal-only testing I did on a pulse integrals (all with 50/100)
gave increase in the hit/cluster multiplicity I showed here on page 12 (I checked this a little
even-by-event and concluded this was also coming from threshold effects):

https://confluence.slac.stanford.edu/download/attachments/192188242/3PoleAna.pdf

-Nathan




On Jun 8, 2015, at 12:48, Graham, Mathew Thomas <[log in to unmask]> wrote:

> How many events are we talking about here?  
> 
>> On Jun 8, 2015, at 9:43 AM, Graf, Norman A. <[log in to unmask]> wrote:
>> 
>> Hello All,
>> I had skimmed a number of what I considered to be "golden" events off the pass0 stream and had written an integration test to monitor the reconstruction. Each event was required to have two ReconstructedParticles (one electron, one positron), with clusters matched to the tracks and each track required to have six hits. No other clusters or tracks were allowed in the event. I assumed that with the relatively minor modifications going into the pass1 release that I would be able to assert the same conditions on the pass1 output. I was quite surprised by how many events changed, gaining or losing tracks and clusters.
>> I'm wondering if anyone else has done an event-by-event comparison and whether these differences are expected behavior.
>> The test file I am using is available at: 
>> http://www.lcsim.org/test/hps-java/run5772_golden.evio
>> 
>> Thanks,
>> Norman
>> 
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