Adrian,
Can you please send me a description and the location of your MC
files, and crunches? I would like to test them against the original
MASCARAD code.
--thanks, Chris
_______________________________________
TA-53/MPF-1/D111 P-23 MS H803
LANL, Los Alamos, NM 87545
505-665-9804(o) 665-4121(f) 662-0639(h)
_______________________________________
On Apr 12, 2006, at 16:23:08, Adrian T Sindile wrote:
> Hi Michael,
> I used channel 266 in all my simulations (with default cutoff), so
> the results I presented then should be valid.
>
> Thank you,
> Adrian
>
>> -Mascarad handling
>> +Mascarad channel "666" only produces tail, starting from low energy
>> cutoff. Default is 10 MeV
>> +Use channel "266" (mixes Epel and Mascarad) for realistic MC
>> Sum of unradiated and radiated yield should reproduce total elastic
>> cross section (important to normalize radtail for inelastic
>> channels).
>> +The smaller the low-energy cutoff, the more the Mascarad part is
>> weighted (automatically in "266", however renormalization of total
>> cross section required). The cutoff can be chosen in the input
>> file.
>> +Cutoff should be smaller than the resolution, but large enough to
>> not cause numerical instabilities. Present default is 10 MeV,
>> resolution
>> is ~30 MeV.
>> +To-do-list for Mascarad users (Eugene, Adrian,...):
>> Run Epel+Mascarad ("266") for different low-energy cutoff values and
>> compare MC yield with data (W spectrum). Find range of cutoff values
>> for which MC/data doesn't vary, assuming realistic resolution (!)
>> +Tune the resolution such that MC best reproduces data. Tip: look at
>> ratio MC/data versus W for all adjustments of cutoff and resolution
>> +Goal: By how much does the location of the W peak maximum bin shift
>> compared to the unradiated peak position depending on the
>> resolution?
>> This result should be parametrized and separately accounted for
>> along
>> with energy loss of the proton when "residual kinematic
>> corrections" are
>> determined.
>>
>>
>> -Shifted acceptance
>> +Acceptance has not shifted in data reconstruction
>> +Discrepancy between data and MC at forward angles for d(e,e'p)n and
>> d(e,e'n)p, see Eugene's and Adam's plots (meeting_060412)
>> +Tossing volume starts at 24 degrees which is too large, should be 22
>> degrees or smaller
>> +VZ attributes discrepancy to the way the white generator distributes
>> events in phase space, giving poor yield at small angles but I don't
>> buy this
>> +Tossing volume should be at least as large as necessary to cover all
>> resolution smearing.
>> +Unclear how hPz at smallest Q2bin is affected
>>
>>
>>
>>
>>
>> +-------------------------------------+--------------------------+
>> | 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. | |
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>> | Email: kohlm@mit.edu | K.Michael.Kohl@gmx.de |
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>> | http://blast.lns.mit.edu | |
>> +-------------------------------------+--------------------------+
>>
>>
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>
> --
>
> ----------------------------------------------------------------------
> --
> Adrian Sindile Room 205A, DeMeritt Hall
> Research Scientist phone: (603)862-1217
> Xenon Imaging Center & FAX: (603)862-2998
> Nuclear Physics Group email: asindile@unh.edu
> University of New Hampshire http://einstein.unh.edu/~adrian/
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