Re: BCAL timing from beam test - bafflement - please look

[Alex Dzierba <dzierba@indiana.edu>]

Hi Richard
OK - thanks - but do you understand the correlation with beam energy (see
upper left of the 4 correlation plots)?  And the structure in the TDC vs energy
for the beam?  Thanks very much for your help
Alex

At 10:02 AM -0500 2/15/08, Richard Jones wrote:
>Alex,
>
>Do you mean the multiple peaks in tdc spectra?  These look like the 
>typical differences in the taggerOR propagation delays, depending on 
>which tagger counter produced the t0 for the event.  In general, it 
>is best to always look at differences of individual counter TDC's 
>that take out the trigger (TDC-stop) time.  There are generally 
>artifacts in the trigger time that are not very interesting to study.
>
>Richard Jones
>
>
>Alex Dzierba wrote:
>>Dear Calorimeter Crazies
>>
>>I decided to start looking that BCAL timing information from the beam
>>test and am immediately baffled by timing I see in the data for
>>Run 2334 (beam normally incident at module center).  Please look at:
>>http://dustbunny.physics.indiana.edu/~dzierba/ARDGlueX/BCAL/timing
>>
>>Am I missing something that has been discussed before?   I want to
>>know before I proceed further.  Please let me know.
>>
>>Cheers
>>Alex
>
>
>
>Content-Type: application/x-pkcs7-signature; name="smime.p7s"
>Content-Disposition: attachment; filename="smime.p7s"
>Content-Description: S/MIME Cryptographic Signature
>
>Attachment converted: Macintosh HD:smime 21.p7s (    /    ) (00299F16)


-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Alex R. Dzierba
Chancellor's Professor of Physics (Emeritus)
Department of Physics / Indiana U / Bloomington IN 47405 / 812-855-9421
JLab Visiting Fellow
Jefferson Lab / 12000 Jefferson Ave / Newport News, VA 23606 / 757-269-7577
Home Phone: 812-825-4063  Cell:  812-327-1881  Fax: 866-541-1263
http://www.dzre.com/alex
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~