Hi Sho,

thanks, that makes sense.

I guess may be at some point it would be good to have a "tour" of the drivers to understand what can be varied so that questions like "what can we do to the detector configuration to be sensitive to this" and "what cuts in the reconstruction reject our tracks" can be answered.

-y

On Aug 17, 2012, at 12:06 PM, Sho Uemura wrote:

> I don't know much about the tracking strategies or about the detectors, but I think the relevant difference between TestRun-v2 and EcalTest is the beam gap.
> 
> TestRun-v2 uses the actual SVT position (roughly) we had in May, which was for photon running - so the tracker halves are spread wide and your acceptance for far-forward decays is terrible. It looks like EcalTest has the nominal (electron running) beam gap. So maybe you don't want to use TestRun-v2. I can look around and see if there's a more suitable detector for you to use.
> 
> Make a plot driver, stick it into the steering file, and put AidaSaveDriver in the steering file. You might look at ecal_fadc_bkgd.lcsim as an example of how to do that. But yes, it's fairly simple.
> 
> Pushing this thread into hps-software, by the way - we're trying to use this list more.
> 
> On Fri, 17 Aug 2012, Joey Reichert wrote:
> 
>> Hi Sho,
>> 
>> I am seeing MatchedTracks now, I'm surprised at how few of them though. I'm
>> seeing about 30 tracks in files with 500 events with this setup whereas the
>> HPS-EcalTest setup has been giving us closer to 300 tracks per 500 events.
>> Since we're generating events with four electrons in the final state,
>> that's about 1% of electrons reconstructed, which seems rather low. I tried
>> loosening up all of the cutoffs in the tracking strategy too, but that
>> didn't seem to help...Should there be that many fewer reconstructed
>> particles with the TestRun-v2 detector compared with the EcalTest?
>> 
>> In either case, the next thing we'd want to do is learn how to create plots
>> with this type of analysis. Is it going to be as simple as creating a plot
>> driver and loading it into the HPSTrackingDefaults.lcsim?
>> 
>> Thanks again,
>> Joey
>> 
>> On Thu, Aug 16, 2012 at 7:42 PM, Sho Uemura <[log in to unmask]> wrote:
>> 
>>> Try changing the tracking strategy to HPS-TestRun-v2-357.xml. I was just
>>> now testing stuff with HPS-Test-4pt0.xml and not getting MatchedTracks. I
>>> don't honestly know what strategy you're supposed to be using though.
>>> 
>>> 
>>> On Thu, 16 Aug 2012, Joey Reichert wrote:
>>> 
>>> Hi Matt,
>>>> 
>>>> I'm still slightly unclear about this. I have a slcio file made via SLIC,
>>>> which ran over a stdhep file. Is there some intermediate slcio file
>>>> involved in SimDist that I'm forgetting about?
>>>> 
>>>> I understand that my slcio file does not have the extended classes like
>>>> SeedTrack, HelicalTrackHits, etc. to start, but the
>>>> HPSTrackingDefaults.lcsim opens up the slcio file and finds these specific
>>>> types of hits, tracks, etc. So all of these become accessible, including
>>>> the TrackerHits, which I'm seeing plenty of. In principle, these
>>>> TrackerHits should be converted to MatchedTracks by one of the drivers
>>>> called in the xml file (I think the TrackerReconDriver?), which we could
>>>> then do analysis on and do things like create plots as long as we do it
>>>> all
>>>> within one job (which means the *_trackRecon.slcio files would not show
>>>> any
>>>> extended class information). But since I'm not seeing MatchedTracks, I
>>>> can't go beyond that point yet.
>>>> 
>>>> So it sounds like it's an issue on my end, since you're saying
>>>> MatchedTracks should be created with HPSTrackingDefaults.lcsim. Do you
>>>> guys
>>>> have a sample slcio file created by SLIC that works with the
>>>> HPSTrackingDefaults.lcsim that I could use to check that everything is
>>>> consistent?
>>>> 
>>>> Also: we're interested in looking at the record of what happens in the
>>>> detector (using HPS-EcalTest), which we believe GEANT should be able to
>>>> tell us. Is that a better question for Norman, perhaps?
>>>> 
>>>> Thanks again,
>>>> Joey
>>>> 
>>>> On Wed, Aug 15, 2012 at 4:09 PM, Graham, Mathew Thomas <
>>>> [log in to unmask]> wrote:
>>>> 
>>>> 
>>>>> Let me just try to summarize:
>>>>> 
>>>>> --->  you have a slcio file (selected.slcio) made by running on another
>>>>> slcio file (orig. slcio) and selecting some events (say, requiring at
>>>>> least
>>>>> one track)
>>>>> --->  now you want to read selected.slcio and do some analysis on the
>>>>> tracks?.
>>>>> 
>>>>> ========  This likely doesn't work out the box because lcio only knows
>>>>> about "Tracks", so the "SeedTrack" info is dropped, similarly for the
>>>>> hits
>>>>> --->  you should be able to run selected.slcio with
>>>>> HPSTrackingDefaults.lcsim and get HelicalTrackHits and SeedTracks (i.e.
>>>>> "MatchedTracks") though?as long as there are TrackerHits in your
>>>>> collection
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> btw, you HPS-TestRun-v2 is in the JLAB from (beam is in z, non-bend is y)
>>>>> 
>>>>> On Aug 15, 2012, at 12:53 PM, Joey Reichert <[log in to unmask]
>>>>> <mailto:
>>>>> [log in to unmask]>> wrote:
>>>>> 
>>>>> Hi All,
>>>>> 
>>>>> Is what I said in the last email about seeing MatchedTracks correct? And
>>>>> are you guys seeing MatchedTracks with SLIC lcio files? If so, I'd
>>>>> imagine
>>>>> it comes down to either a problem with my (SLIC) lcio file, or my build
>>>>> of
>>>>> one of the hps-java drivers. In either case, I can investigate, but I
>>>>> just
>>>>> want to check to make sure my understanding of the problem is correct
>>>>> before going too far.
>>>>> 
>>>>> Thanks for all the help,
>>>>> Joey
>>>>> 
>>>>> On Fri, Aug 10, 2012 at 3:20 PM, Joey Reichert <[log in to unmask]
>>>>> <mailto:[log in to unmask]>**> wrote:
>>>>> Hi Guys,
>>>>> 
>>>>> This explains why things were not working in JAS, but I should still be
>>>>> seeing MatchedTracks after calling HPSTrackingDefaults.lcsim, right? With
>>>>> the debug option on TrackerReconDriver set to on, I'm seeing the
>>>>> HelicalTrackHits, but still no MatchedTracks.
>>>>> 
>>>>> Also, what reference frame does HPS-TestRun-v2 assume? I'm guessing the
>>>>> JLab frame, and I've run lcio files in either frame through the
>>>>> HPSTrackingDefaults.lcsim without seeing MatchedTracks, but it'll be one
>>>>> less thing to worry about.
>>>>> 
>>>>> Thanks again,
>>>>> Joey
>>>>> 
>>>>> 
>>>>> On Tue, Aug 7, 2012 at 10:00 PM, Graham, Mathew Thomas <
>>>>> [log in to unmask]<**mailto:[log in to unmask]**edu<[log in to unmask]>>>
>>>>> wrote:
>>>>> 
>>>>> Ah?this is likely related to the issue Elwin is having too.
>>>>> 
>>>>> 
>>>>> Thanks!
>>>>> 
>>>>> On Aug 7, 2012, at 6:39 PM, Joey Reichert <[log in to unmask]<mailto:
>>>>> [log in to unmask]><mailto:**[log in to unmask]<[log in to unmask]>
>>>>> <mailto:
>>>>> [log in to unmask]>>> wrote:
>>>>> 
>>>>> Hi Jeremy,
>>>>> 
>>>>> Ah, that makes sense. No wonder it wasn't working...Are there any
>>>>> downsides to running everything in one job? That's essentially what JAS
>>>>> does, correct?
>>>>> 
>>>>> Thanks for all the help!
>>>>> Joey
>>>>> 
>>>>> On Tue, Aug 7, 2012 at 7:53 PM, McCormick, Jeremy I. <
>>>>> [log in to unmask]<**mailto:[log in to unmask]**edu<[log in to unmask]>
>>>>>> <mailto:
>>>>> [log in to unmask]<**mailto:[log in to unmask]**edu<[log in to unmask]>>>>
>>>>> wrote:
>>>>> Hi, Matt.
>>>>> 
>>>>> Joey and I were able to figure out the issue with his analysis.  When
>>>>> collections are written out to an LCIO file, extended class information
>>>>> is
>>>>> lost.  For instance, HelicalTrackHits become plain old TrackerHits.  So
>>>>> that means that if there is code that depends on these specific classes
>>>>> being present, it will fail if you read back the LCIO file in a second
>>>>> job.
>>>>> It must be done ?inline? within the same job when the HelicalTrackHits
>>>>> are
>>>>> 
>>>>> accessible.  He was trying to pick out 2 track events, write them to an
>>>>> LCIO file, and then read them back for analysis.  But this doesn?t work
>>>>> for
>>>>> this very reason.  LCIO doesn?t know anything about HelicalTrackHits.  It
>>>>> only understands basic TrackerHits.
>>>>> 
>>>>> I don?t know of any way to get around this problem, other than running
>>>>> 
>>>>> everything in the same job.  Because there is no way in LCIO to tell what
>>>>> specific class you used to generate the objects in the first place.  Do
>>>>> you
>>>>> usually just run everything including your plotting in the ?evio 2 lcio?
>>>>> step?
>>>>> 
>>>>> --Jeremy
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>> 
>> 

--------------------------
Prof. Yuri Gershtein
[log in to unmask]
http://physics.rutgers.edu/~gershtein
(732)445-5500 x1794
W316 Serin Building
Department of Physics and Astronomy
136 Frelinghuysen Rd
Rutgers University
Piscataway, NJ 08854

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