[b1_ana] draft V3

Mon May 6 00:40:15 EDT 2013

Sorry! I fixed it.

-Karl

On Sun, May 5, 2013 at 11:47 PM, Simonetta Liuti <sl4y at cms.mail.virginia.edu
> wrote:

> Hi All,
> I just noticed that my name in the front is misspelled: Liuti instead of
> Luiti.
>
> Simonetta
>
>
> On Sat, 4 May 2013 20:19:19 -0400
>  Karl Slifer <karl.slifer at unh.edu> wrote:
> >Hi Ellie,
> >
> >I don't have any suggestions for further tweaks.  Combining the central
> two
> >points would look compelling but the x bin would be quite large.  We
> should
> >have a slide as backup for the PAC, but I think its ok to leave separate
> >for now.
> >
> >Is it possible to post or send the .agr files?  I think I can make them
> >behave and produce clean plots...
> >
> >-Karl
> >
> >
> >---
> >Karl J. Slifer
> >Assistant Professor
> >University of New Hampshire
> >Telephone : 603-722-0695
> >
> >
> >On Sat, May 4, 2013 at 8:08 PM, Elena Long <ellie at jlab.org> wrote:
> >
> >> Good evening,
> >>
> >> The *.eps files of the plots can be found here:
> >> http://nuclear.unh.edu/~elong/analysis_files/2013-05-04/
> >>
> >> I apologize that they're not vectors. xmgrace didn't output the plots
> >> quite like I expected it to, and I'm not certain that I can figure out
> why
> >> before the deadline.
> >>
> >> I do once again want to point out
> >>
> https://hallcweb.jlab.org/wiki/index.php/Elong-13-05-02#Current_Best_Numbers
> >>
> >> In particular, I want to make sure that everyone's ok with the x bins in
> >> b1 and Azz. The two center points could be joined if we wanted, or we
> could
> >> take some time off of the smallest x bin and give it to one of the other
> >> ones. If there's any tweaking of the points that folks would like to
> see,
> >> please let me know.
> >>
> >> Also for clarification, the rate and time estimates are for the
> >> spectrometers at each of the blue and red blobs in the kinematics plots.
> >> They don't directly correlate to the x bins for Azz and b1 since we're
> >> merging data from different kinematics settings.
> >>
> >> Take care,
> >> Ellie
> >>
> >>
> >>
> >> On May 4, 2013, at 7:36 PM, Karl Slifer <karl.slifer at unh.edu> wrote:
> >>
> >>
> >> PPS : please note that in the overhead I assumed we would switch
> >> polarization states twice per day and I assumed 2 hours each time.  I
> think
> >> this would imply about 10 "buckets" of polarized counts and 10
> "buckets" of
> >> unpolarized counts for each of our 3 x-points.   It is our dominant
> >> overhead at 5 days total.
> >>
> >> I think we may have a little room to move here.  Please see the attached
> >> plot from g2p data, where we depolarized the (proton) target by pumping
> >> with microwaves in less than 4 minutes.  The pump up is also very fast
> with
> >> the new fridge and blasting the wattage of the new microwave cavity the
> >> pump up is about 30 mins to the negative state.  I think polarizing in
> the
> >> positive state is usually a little faster.
> >>
> >> So, perhaps we can be a little more aggressive in our overhead estimate
> :5
> >> or 10 mins for depolarizing and 30 mins to polarize.  That would give us
> >> the flexibility to increase the number of "buckets" to say 10 or 12
> total
> >> per day.  It will be a large overhead (about 12 days just for this),
> but oh
> >> well.  Would this be sufficient to control the known drifts?
> >>
> >> A little more radical would be to explore the idea of flipping from
> >> positive to negative tensor polarization rapidly with an AFP type flip,
> >> which I believe is near instantaneous.  This is essentially what happens
> >> with hole burning anyway I think.
> >>
> >> -Karl
> >>
> >>
> >>
> >> ---
> >> Karl J. Slifer
> >> Assistant Professor
> >> University of New Hampshire
> >> Telephone : 603-722-0695
> >>
> >>
> >> On Sat, May 4, 2013 at 6:47 PM, Karl Slifer <karl.slifer at unh.edu>
> wrote:
> >>
> >>>
> >>> Hi All,
> >>>
> >>> I've posted the updated draft at
> >>>
> >>> https://dl.dropboxusercontent.com/u/59933793/tensor_b1_v03.pdf
> >>>
> >>> There is some lagtime for implementation, but I think this reflects
> >>> pretty well where our discussion was about 24 hours ago.  However, we
> still
> >>> need:
> >>>
> >>> -updated rates/kin plots from Ellie or Patricia and values for the
> table
> >>>
> >>> -some consensus on how to address Steve's comments.
> >>>
> >>> It seems we have three options with time running short.
> >>>
> >>> 1) List all possible factors that drift with time and atleast sketch a
> >>> plan to deal with them.
> >>>
> >>> 2) go back to difference of counts.
> >>>
> >>> 3) Cancel submission and work on this for next PAC.
> >>>
> >>> I lean to the first, Oscar leans to the second.  I'd very much like to
> >>> find some consensus on this.  Am I the only one still nerding it up in
> >>> front of my computer on this beautiful spring day?
> >>>
> >>> -Karl
> >>>
> >>> PS : If anyone makes suggestions for changes I would very much
> appreciate
> >>> that they be in a form that I can put into the document quickly.
> >>>
> >>> ---
> >>> Karl J. Slifer
> >>> Assistant Professor
> >>> University of New Hampshire
> >>> Telephone : 603-722-0695
> >>>
> >>
> >> <spin_flip.png>_______________________________________________
> >> b1_ana mailing list
> >> b1_ana at jlab.org
> >> https://mailman.jlab.org/mailman/listinfo/b1_ana
> >>
> >>
> >>  --------------------------------------------
> >> Elena Long, Ph.D.
> >> Post Doctoral Research Associate
> >> University of New Hampshire
> >> elena.long at unh.edu
> >> ellie at jlab.org
> >> (603) 862-1962
> >>
> >>
> >> _______________________________________________
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> >> b1_ana at jlab.org
> >> https://mailman.jlab.org/mailman/listinfo/b1_ana
> >>
> >>
>
> **************************************************************
> **************************************************************
> Prof. Simonetta Liuti                     telephone (434) 982-2087
> Department of Physics               FAX       (434) 924-4576
> University of Virginia              home      (434) 973 9593
> 382 McCormick Rd.
> PO Box 400714
> Charlottesville, VA 22904-4714
>
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