[b1_ana] draft V3

[Karl Slifer]

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
>>
>
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>
>  --------------------------------------------
> 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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