Eugene,
For the maps I did in 2002, it was a Sentron 3R-100-3 probe (also bought
from GMW).
Karen
Ernie Ihloff wrote:
> Eugene,
>
> It was a Sentron type *3M12-2-2* that I bought from GMW. Go to the GMW
> web site and look at the 2.0 T 3d unit.
>
> Ernie
>
>
>
> Ernie Ihloff, P.E.
> Engineering Group Leader- EE
> MIT Bates Research & Engineering Center
> Office 617-253-9503
> Cell 781-760-9381
> eihloff@mit.edu <mailto:eihloff@mit.edu>
>
>
>
>
> On Jul 30, 2006, at 4:42 PM, Eugene J. Geis wrote:
>
>> Does anyone know the manufacturer of the 3D Probe
>> used for the magnetic field measurements in the
>> target? I'd like to look at a few specs.
>>
>> -eugene
>>
>> Quoting Michael Kohl <kohlm@mit.edu <mailto:kohlm@mit.edu>>:
>>
>>> Hi Eugene,
>>>
>>> here's my summary from May 30 including the two "nominal" angles to be
>>>
>>> used with Doug's averaged map.
>>>
>>>
>>>
>>> ---------- Forwarded message ----------
>>> Date: Tue, 30 May 2006 13:26:05 -0400 (EDT)
>>> From: Michael Kohl <kohlm@mit.edu <mailto:kohlm@mit.edu>>
>>> To: "[BLAST_ANAWARE]" <Blast_anaware@rocko.lns.mit.edu
>>> <mailto:Blast_anaware@rocko.lns.mit.edu>>
>>> Subject: Spin angle summary
>>>
>>> Hello:
>>>
>>> this is to summarize the final numbers for the target spin angle:
>>>
>>> We agreed to use the ed elastic tensor asymmetry to first determine the
>>> ed
>>> elastic yield-weighted average, and then deduce theta_nominal for the
>>> considered profile [theta_nominal = theta(z=0)].
>>>
>>> Doug's profile should be used. It is in cvs at
>>> exp/analysis/macros/target_spin_angle.C.
>>> It requires a global alignment given by "theta_nominal" which is the
>>> profile's value at z=0. While the same theta_nominal applies to all
>>> reaction analyses, each resulting yield-weighted average angle can
>>> vary individually. For use in DGen, I've added the 32 and 47 deg
>>> profiles
>>> with proper values for "theta_nominal" (see below) into kine.init just
>>> as a
>>> grid z:theta, uncomment the lines to activate. I've generated the lines
>>> in
>>> kine.init with the macro exp/analysis/macros/DPprofile_to_kineinit.C,
>>> find both
>>> in the latest cvs.
>>>
>>> Results:
>>> For the "32" degree setting, theta_nominal = 34.12 +- 0.43
>>> For the "47" degree setting, theta_nominal = 48.84 +- 0.45
>>> Chi recommends to generally quote an error of 0.5 degrees to be on
>>> "the conservative side and and to partially reflect the fact that
>>> there are conflicting results" [with ep elastic when it is used to
>>> determine the spin angle].
>>>
>>> In the table below, compare <th>_yield between "map" and "asym": it
>>> tells by how much a given map needs to be shifted to comply with the
>>> physics of tensor ed elastic. The error is given by the uncertainty
>>> with which the overall alignment can be determined from the ed elastic
>>> tensor asymmetry and is on the order of 0.5 degrees, while the error on
>>> the
>>> "shape" of the profile(s) is on the order of 0.1 deg or less and hence
>>>
>>> negligible.
>>>
>>> 32 degrees setting: ed elastic
>>> ==============================
>>> Ed-elastic yield-weighted average angle for original maps from survey:
>>> <th>_yield <dth>_yield theta_nominal(z=0) Comment
>>> 31.2(map) -2.89 34.09 original Jan2005 map
>>> 30.6(map) -2.75 33.35 original Jun2005 map
>>> "map" is the yield-weighted average angle for a given original map
>>> ----------------------------------------------------------------------
>>> Angle from tensor asymmetry analysis and resulting theta_nominal:
>>> <th>_yield <dth>_yield theta_nominal(z=0) Comment
>>> 31.3(asym) -2.89 34.19 shifted Jan2005 + 0.1
>>> -2.75 34.05 shifted Jun2005 + 0.7
>>> -2.82(av.) ->34.12 nominal angle for DH's profile
>>> 31.7(oldasym)
>>> "asym" is the yield-weighted average angle from asymmetry analysis
>>> (asym=v3_4_18, oldasym=online crunch version)
>>> ==> theta_nominal = 34.12 degrees
>>> Error on theta_nominal: statistical: 0.35
>>> tracking: 0.20
>>> false asym: 0.10
>>> theory: 0.10
>>> TOTAL: 0.43
>>>
>> ===============================================================
>> =======
>>
>>>
>> ===============================================================
>> =======
>>
>>>
>>> 47 degrees setting: ed elastic
>>> ==============================
>>> Ed-elastic yield-weighted average angle for original maps from survey:
>>> <th>_yield <dth>_yield theta_nominal(z=0)
>>> 47.0(map) -1.5 48.5 original Jul2004 map
>>> 46.7(map) -1.5 48.2 original Jan2005 map
>>> 46.2(map) -1.32 47.52 original Jun2005 map
>>> "map" is the yield-weighted average angle for a given original map
>>> ----------------------------------------------------------------------
>>> Angle from tensor asymmetry analysis and resulting theta_nominal:
>>> <th>_yield <dth>_yield theta_nominal(z=0)
>>> 47.4(asym) -1.5 48.9 shifted Jul2004 + 0.4
>>> -1.5 48.9 shifted Jan2005 + 0.7
>>> -1.32 48.72 shifted Jun2005 + 1.2
>>> -1.44(av.) ->48.84 nominal angle for DH's profile
>>> 47.8(oldasym)
>>> "asym" is the yield-weighted average angle from asymmetry analysis
>>> (asym=v3_4_19, oldasym=online crunch version)
>>> ==> theta_nominal = 48.84 degrees
>>> Error on theta_nominal: statistical: 0.45
>>> tracking: 0.12
>>> false asym: 0.01
>>> theory: 0.10
>>> TOTAL: 0.45
>>>
>> ===============================================================
>> =======
>>
>>>
>> ===============================================================
>> =======
>>
>>>
>>>
>>> Best 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 <mailto:kohlm@mit.edu> |
>>> K.Michael.Kohl@gmx.de <mailto: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 <mailto:eugene.geis@asu.edu>
>> --------------------------------------------------------------------------
>> http://quickreaction.blogspot.com
>
>
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