Hi Eugene,
One thing that I mentioned in the meeting was that ideally one
should not just determine the offsets by requiring elastic
constraints on the momentum or matching the beam energy, but one
should systematically minimize all 5 over-constrained wire chamber
parameters of elastic kinematics to get best-fit offsets of each wire
chamber track parameter. Of course, ideally one should work directly
with physical hardware offsets like the magnetic field and wire
chamber geometry, and first try to get those offsets from calibration
data like cosmics or straight tracks before calibrating on elastic
data. If you just go about trying to calibrate one variable from
another, you have no way of knowing which one was correct in the
first place.
--Chris
On Nov 3, 2005, at 11:04:47, Eugene J. Geis wrote:
> This is my recent analysis of the ep-elastic kinematics coming from
> the new crunch as compared to the
> old crunch from before February. Most of the slides should be
> explained well enough. Axes are
> defined and a few comments are posted.
>
> Mike,
> I notice a few shifts overall... so I would have to conclude that
> the corrections are slightly different. I
> would prefer to resolve the theta difference and put these two
> relations,
> theta_e(theta_p) - theta_e
> theta_p(theta_e) - theta_p
>
> at zero. Once that is done, I'll recalculate offsets. I may start
> my corrections with the left sector
> protons considering their uncanny ability to reconstruct the beam
> energy so well... Using those, I can
> potentially use the reconstruction of left sector protons as a
> benchmark for right sector electrons and
> then extrapolate the proper measurements for the opposite sector
> reaction. Then I'll start pushing this
> analysis into the D2 with Zilu's quasielastic kinematic formula
> from his thesis.
>
>
>
> eugene
>
>
>
> Quoting Michael Kohl <kohlm@mit.edu>:
>
>> Hi Eugene,
>>
>> thank you for this analysis which gives some good insights.
>> Hopefully,
>>
>> with the improved wire calibrations to come this will improve.
>>
>> Would you conclude that your previous parameterizations of "kinematic
>> corrections" are still valid for v3_4_14?
>>
>> Regards,
>>
>> Michael
>>
>>
>> On Wed, 2 Nov 2005, Eugene J. Geis wrote:
>>
>>> I updated the file and made it much more readable... Should be
>> well-explained. Email with questions.
>>>
>>> I'll probably send it to the collaboration by day's end.
>>>
>>> /home/blast/egeis/H2_data_analysis.pdf
>>>
>>> -e
>>>
>>> Quoting Michael Kohl <kohlm@mit.edu>:
>>>
>>>> Hi Eugene,
>>>>
>>>> sorry, too late, only noticed it now. You can choose to either
>> comment
>>>> on
>>>> this by email, or to present it next Wednesday.
>>>>
>>>> CC was on the speakerphone. We discussed also about the beam energy
>> and
>>>> it
>>>> was said again that there is no doubt about the beam energy. I see
>>>> this confirmed by your analysis that there is no common offset of
>> the
>>>> beam energy to all combinations.
>>>>
>>>> Wait for the minutes.
>>>>
>>>> Regards,
>>>>
>>>> Michael
>>>>
>>>>
>>>> On Wed, 2 Nov 2005, Eugene J. Geis wrote:
>>>>
>>>>> Call me if you're getting this... I have a file in
>>>> /home/blast/egeis/ called "H2_data_analysis.pdf" that
>>>>> I'd like to show.
>>>>>
>>>>> Phone number: 480-965-7562
>>>>>
>>>>> eugene
>>>>>
>>>>>
>>>>>
>>>>> Sorry, it's last minute....
>>>>>
>>>>> Quoting Michael Kohl <kohlm@mit.edu>:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> we meet tomorrow at 13:30 in the Bates conference room. People
>> are
>>>> asked
>>>>>>
>>>>>> to present their updates.
>>>>>>
>>>>>>
>>>>>> Agenda:
>>>>>> -Updates
>>>>>> -Recrunch status
>>>>>> -Agenda for Monday 11/14/2005
>>>>>>
>>>>>>
>>>>>> Dates of upcoming meetings:
>>>>>>
>>>>>> -Monday 11/14/2005 13:30
>>>>>> + Rehearsal for BLAST @ ELSA
>>>>>> -Thursday 12/01/2005 13:30
>>>>>> + Report from visit in Bonn
>>>>>> -Wednesday 12/07/2005 13:30
>>>>>> -Wednesday 12/14/2005 13:30
>>>>>> -Wednesday 12/21/2005 13:30
>>>>>>
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Michael
>>>>>>
>>>>>>
>>>>>>
>> +-------------------------------------+--------------------------+
>>>>>> | Office: | Home:
>> |
>>>>>>
>> |-------------------------------------|--------------------------|
>>>>>> | Dr. Michael Kohl | Michael Kohl
>> |
>>>>>> | Laboratory for Nuclear Science | 5 Ibbetson Street
>> |
>>>>>> | MIT-Bates Linear Accelerator Center | Somerville, MA 02143
>> |
>>>>>> | Middleton, MA 01949 | U.S.A.
>> |
>>>>>> | U.S.A. |
>> |
>>>>>> | - - - - - - - - - - - - | - - - - - - - -
>> -|
>>>>>> | Email: kohlm@mit.edu | K.Michael.Kohl@gmx.de
>> |
>>>>>> | Work: +1-617-253-9207 | Home: +1-617-629-3147
>> |
>>>>>> | Fax: +1-617-253-9599 | Mobile: +1-978-580-4190
>> |
>>>>>> | http://blast.lns.mit.edu |
>> |
>>>>>>
>> +-------------------------------------+--------------------------+
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>> ---------------------------------------------------------------------
>> -----
>>>>> Eugene Geis
>>>>> PhD Student, Physics Department, ASU
>>>>> Research Affiliate, MIT-Bates Laboratory of Nuclear Science
>>>>> eugene.geis@asu.edu
>>>>>
>>>>
>> ---------------------------------------------------------------------
>> -----
>>>>> http://quickreaction.blogspot.com
>>>>>
>>>>
>>>>
>>>> +-------------------------------------+--------------------------+
>>>> | Office: | Home: |
>>>> |-------------------------------------|--------------------------|
>>>> | Dr. Michael Kohl | Michael Kohl |
>>>> | Laboratory for Nuclear Science | 5 Ibbetson Street |
>>>> | MIT-Bates Linear Accelerator Center | Somerville, MA 02143 |
>>>> | Middleton, MA 01949 | U.S.A. |
>>>> | U.S.A. | |
>>>> | - - - - - - - - - - - - | - - - - - - - - -|
>>>> | Email: kohlm@mit.edu | K.Michael.Kohl@gmx.de |
>>>> | Work: +1-617-253-9207 | Home: +1-617-629-3147 |
>>>> | Fax: +1-617-253-9599 | Mobile: +1-978-580-4190 |
>>>> | http://blast.lns.mit.edu | |
>>>> +-------------------------------------+--------------------------+
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>
>>
>> +-------------------------------------+--------------------------+
>> | Office: | Home: |
>> |-------------------------------------|--------------------------|
>> | Dr. Michael Kohl | Michael Kohl |
>> | Laboratory for Nuclear Science | 5 Ibbetson Street |
>> | MIT-Bates Linear Accelerator Center | Somerville, MA 02143 |
>> | Middleton, MA 01949 | U.S.A. |
>> | U.S.A. | |
>> | - - - - - - - - - - - - | - - - - - - - - -|
>> | Email: kohlm@mit.edu | K.Michael.Kohl@gmx.de |
>> | Work: +1-617-253-9207 | Home: +1-617-629-3147 |
>> | Fax: +1-617-253-9599 | Mobile: +1-978-580-4190 |
>> | http://blast.lns.mit.edu | |
>> +-------------------------------------+--------------------------+
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> <H2_data_analysis.pdf>
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