[Halld-cal] [EXTERNAL] Re: BCAL timing in 2017 and 2018

[Elton Smith]

Hi Sean and Mark,

I have taken a quick look at BCAL timing constants that might be 
changing for the MC. See below. From what I can tell all constants have 
mc data sets covering from 0L-inf, except for timewalk_tdc and 
timewalk_tdc_c4. Could these be causing the problem?



ifarm1802:gen_2pi_primakoff>printenv | grep -i connection
SSH_CONNECTION=129.57.82.214 64865 129.57.70.23 22
CCDB_CONNECTION=mysql://ccdb_user@hallddb.jlab.org/ccdb
RCDB_CONNECTION=mysql://rcdb@hallddb.jlab.org/rcdb



ifarm1802:gen_2pi_primakoff>ccdb vers BCAL/ADC_timing_offsets | grep mc
  349    2014-09-17 22-25-24    2014-09-17 22-25-24 mc              0L-inf
  269    2014-07-28 14-48-52    2014-07-28 14-48-52 mc              0L-inf
  179    2014-06-17 15-19-20    2014-06-17 15-19-20 mc              0L-inf
ifarm1802:gen_2pi_primakoff>ccdb vers BCAL/base_time_offset | grep mc
  21638  2017-01-17 13-47-45    2017-01-17 13-47-45 mc              0L-inf
  21637  2017-01-17 13-43-49    2017-01-17 13-43-49 mc              0L-inf
  7553   2015-08-19 13-11-04    2015-08-19 13-11-04 mc              0L-inf
  7543   2015-07-30 14-45-39    2015-07-30 14-45-39 mc              0L-inf
  7532   2015-07-23 14-38-06    2015-07-23 14-38-06 mc_evio         0L-inf
  7531   2015-07-23 08-49-26    2015-07-23 08-49-26 mc_6gev         0L-inf
  7530   2015-07-23 08-49-12    2015-07-23 08-49-12 mc              0L-inf
  336    2014-09-17 22-23-27    2014-09-17 22-23-27 mc              0L-inf
ifarm1802:gen_2pi_primakoff>ccdb vers BCAL/timewalk_tdc | grep mc
ifarm1802:gen_2pi_primakoff>ccdb vers BCAL/timewalk_tdc_c4 | grep mc
ifarm1802:gen_2pi_primakoff>ccdb vers BCAL/channel_global_offset | grep mc
  7684   2015-11-19 16-38-14    2015-11-19 16-38-14 mc              0L-inf
ifarm1802:gen_2pi_primakoff>ccdb vers BCAL/TDC_offsets | grep mc
  348    2014-09-17 22-25-21    2014-09-17 22-25-21 mc              0L-inf
  268    2014-07-28 14-48-49    2014-07-28 14-48-49 mc              0L-inf
  178    2014-06-17 15-19-14    2014-06-17 15-19-14 mc              0L-inf



Elton Smith
Jefferson Lab MS 12H3
12000 Jefferson Ave STE 4
Newport News, VA 23606
(757)269-7625
(757)269-6331 fax

On 1/24/20 9:57 AM, Sean Dobbs wrote:
> Hi all,
>
> We ran out of time at the Calorimetry meeting, but I wanted to bring
> this email that I sent last week up again, to see if anyone had any
> thoughts (or maybe the issue was resolved offline?).  This seems
> crucial for anyone analyzing data.
>
> Cheers,
> Sean
>
>
> On Tue, Jan 14, 2020 at 6:11 PM Sean Dobbs <sdobbs at fsu.edu> wrote:
>> Hi all,
>>
>> The discrepancies that Jon Zarling has seen between runs in the
>> 30000's and 40000's
>> (https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_JeffersonLab_HDGeant4_issues_138&d=DwIGaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=c-_tH8evYLC4MjBfbp0hiQ&m=bg_IXzqYQJjEPLmMwJGH1St3kILY4fM4wKKQyqQZv6s&s=u8ONG-wYb3Dt1x9D-l1BBmRtbu1qw1-xCbph3Vst7h4&e= ) were brought up
>> in today's HDGeant4 meeting.  Differences between run periods are
>> surely due to some difference in the calibration constants used.
>>
>> I wonder if someone could remind me what the difference between how we
>> did timing calibrations in 2017 and 2018 was?  I noticed that
>> /BCAL/tdiff_u_d had non-zero values in the 30000's and was zeroed out
>> in the 40000's.
>> Frankly, I can't remember what was done right now and couldn't find
>> out where it was written down.   This is relevant to the simulations
>> since this table is applied when calibrating digihits, but isn't
>> compensated for in mcsmear.  But maybe I'm not remembering an
>> important piece to the puzzle...
>>
>> Cheers,
>> Sean
>>
>>
>> ifarm1402.jlab.org> ccdb cat BCAL/tdiff_u_d:41509:mc | head -n 15
>> +------------+
>> | tdiff_u_d  |
>> | double     |
>> +------------+
>> | 0.0        |
>> | 0.0        |
>> | 0.0        |
>> | 0.0        |
>> | 0.0        |
>> | 0.0        |
>> | 0.0        |
>> | 0.0        |
>> | 0.0        |
>> | 0.0        |
>> | 0.0        |
>> <SNIP>
>> ifarm1402.jlab.org> ccdb cat BCAL/tdiff_u_d:31001:mc | head -n 15
>> +------------+
>> | tdiff_u_d  |
>> | double     |
>> +------------+
>> | 0.3226     |
>> | 0.3226     |
>> | 0.3226     |
>> | 0.3226     |
>> | 0.1294     |
>> | 0.1294     |
>> | 0.1294     |
>> | 0.1294     |
>> | -0.1444    |
>> | -0.1444    |
>> | -0.1444    |