From: Lijuan Ruan (ruanlj_at_rcf.rhic.bnl.gov)
Date: Sat Apr 26 2003 - 18:32:36 EDT
Yes,That's true.Thanks/Lijuan
> Lijuan, see my previous email: most likely mod9-2 (assuming your "31"
> corresponds with the 83rd TDC ...) experiences discriminator problems
> either at the platform or on its FEE. If you look carefully your plots
> below already indicate that this problem was around in 4111062: compared
> to the other TDC distributions you see at little bit too many (very)
> late "hits".
>
> cheers,
> frank
>
>
>
>
>
> Lijuan Ruan wrote:
>> Hi,Frank
>> Yes,The strobe events corresponding to TDC channel 1000 or so.
>> It's not overflow.But the tdc distribution is different from others
>> from Xin's plot.I didn't see this from the tof trigger event 4111062.
>> The plot is http://www.star.bnl.gov/protected/spectra/ruanlj/localmon/
>> 4111062_TDC.ps
>> in this ps file ,the TDCdis31 corresponding to module 9 cell 2.I don't
>> see the low TDC range signal.
>>
>> Lijuan
>>
>>
>>
>>> ok guys ... that was funny, but seriously: i just checked and there
>>>are NO overflows. Strobed events show up at channel ~1000 like they
>>> always do (for the dAu run at least). This was the first time that you
>>> guys looked at the raw tof spectra, right ;)
>>>
>>>-frank
>>>
>>>
>>>
>>>
>>>Frank Geurts wrote:
>>>
>>>>wait a minute ... you're probably looking at the strobed events :)
>>>> those have been there from day-one. with everybody having his/her own
>>>> localmon decoding program it is hard to tell whether Xin
>>>>included/excluded those in his.
>>>>
>>>>-frank
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>Geary Eppley wrote:
>>>>
>>>>
>>>>>Hi experts,
>>>>>
>>>>>Xin showed me the TOFr TDC distributions for last night. All the
>>>>> overflows
>>>>>appear to be in channel 1000 (1024?) and not 2000. But there are
>>>>> hits
>>>>> past
>>>>>1000. ?
>>>>>What do you think could account for the distribution in mod 9-
>>>>> channel 2?
>>>>>
>>>>>Geary
>>>>>
>>>>
>>
>>
>>
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