<div dir="ltr"><div>Hi</div><div><br></div><div>In advance of our meeting, <a href="https://www.slac.stanford.edu/exp/e161/target/cdrslacr3.pdf">here</a> is the conceptual design report for the E159 solenoidal target using LiD. I think this is a good reference to start with for considering some of the suggestions that emerged from the tensor workshop. In particular,</div>
<div><br></div><div>- Fig 1 gives LiD spin up times at 5T and 6.5T which is on the order of 30-40 hours. I think that with LiD, the polarization just keeps growing when you put beam on it, so data taking does not necessarily need to wait until max polarization is reached. T.E.s become a big time investment, and we would probably need to seriously consider AFP to kill the polarization, and maybe Josh's suggestion to simultaneously polarize the unused cell (which is just outside the uniform region) by use of an extra compensating coil. </div>
<div><br></div><div>-Max polarizations look to be about Pz=62% and Pz=72%, which corresponds to about Pzz=30% and Pzz=40% respectively. I assume this curve is for 1K, but I can't access the original article (V. Bouffard et al J. Physique, 41, 1447 (1981)). </div>
<div><br></div><div>-the paper discusses using a transverse solenoid dipole for adiabatic field reversals</div><div><br></div><div>-The proposed solenoid would have accomadated a 1cm diameter target, with 5cm length in a 10E-4 uniform field, with a 20 cm (8 inch) diameter bore. The price tag in 2001 was 230K. Inflation adjustment puts that at about $320K today. The EIO tube ($95K) and Roots pumps(93K) in 2001 dollars inflates to about another $250K today. These are not the only expenses, but they would be the main ones summing to 570K. There's plenty of other smaller expenses, so maybe 800-900K for a complete solenoid system? </div>
<div><br></div><div>(For reference our UNH solenoid is <span style="font-family:arial,sans-serif;font-size:13px">7T with 10E-4 uniformity over a 5 cm DSV, with a clear bore of 4 inches,and is about 14inches long.</span>)</div>
<div><br></div><div><br></div><div>-Karl</div><div><br></div><div><br></div><div class="gmail_extra"><br clear="all"><div><div dir="ltr"><br></div></div>
<br><br><div class="gmail_quote">On Fri, Apr 4, 2014 at 1:06 PM, Elena Long <span dir="ltr"><<a href="mailto:ellie@jlab.org" target="_blank">ellie@jlab.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Good afternoon,<br>
<br>
Thank you all for filling out the poll. Based on it, let's have our<br>
next meeting on Thursday, April 17 at 2pm.<br>
<br>
The things that I would like to discuss are new rates calculations<br>
using LiD and He2D (where Li is assumed to be HeD), I want to make sure<br>
that we take the time close enough to the Tensor Workshop to hash out<br>
any remaining discussions left over from the Workshop before they slip<br>
from our minds, and to revisit our plan for achieving our condition<br>
particularly given the pessimistic viewpoints that were raised during<br>
the target session. I welcome any other agenda topics as well.<br>
<br>
Take care,<br>
<div class="im HOEnZb">Ellie<br>
<br>
Elena Long, Ph.D.<br>
Post Doctoral Research Associate<br>
University of New Hampshire<br>
<a href="mailto:elena.long@unh.edu">elena.long@unh.edu</a><br>
<a href="mailto:ellie@jlab.org">ellie@jlab.org</a><br>
<a href="http://nuclear.unh.edu/~elong" target="_blank">http://nuclear.unh.edu/~elong</a><br>
<a href="tel:%28603%29%20862-5312" value="+16038625312">(603) 862-5312</a><br>
<br>
</div><div class="HOEnZb"><div class="h5">On Fri 04 Apr 2014 11:57:55 AM EDT, Oscar Rondon-Aramayo wrote:<br>
> Hi Ellie and all b1 people,<br>
><br>
> I filled the poll, but I'm not sure about the reason for the meeting.<br>
> Is there something time sensitive that we should discuss, such as<br>
> communications with the PAC or the like? It would be a good idea to<br>
> circulate a tentative agenda of the items that would be covered.<br>
><br>
> Otherwise, it may be more effective to just share ideas and proposals<br>
> by email, which also serves to document the process.<br>
><br>
> Cheers,<br>
><br>
> Oscar<br>
><br>
> On Thu, 3 Apr 2014 17:14:10 -0400<br>
> Elena Long <<a href="mailto:ellie@jlab.org">ellie@jlab.org</a>> wrote:<br>
>> Good evening,<br>
>><br>
>> Please take a moment to fill out the scheduling poll below by<br>
>> tomorrow at 1pm so that we can schedule the next b1 meeting.<br>
>>> <a href="http://doodle.com/4ytu2b3b5gqqaz7d" target="_blank">http://doodle.com/4ytu2b3b5gqqaz7d</a><br>
>><br>
>><br>
>> Take care,<br>
>> Ellie<br>
>><br>
>><br>
>>> On Apr 2, 2014, at 1:45 PM, "Elena Long" <<a href="mailto:ellie@jlab.org">ellie@jlab.org</a>> wrote:<br>
>>><br>
>>> Good afternoon,<br>
>>><br>
>>> Since it looks like a number of people aren't able to make it next<br>
>>> week, let's postpone to the following week. Since I imagine our<br>
>>> schedules have changed a bit since our last meeting, please fill out<br>
>>> the Doodle poll below by Friday afternoon so that we can schedule<br>
>>> the next b1 meeting.<br>
>>><br>
>>> <a href="http://doodle.com/4ytu2b3b5gqqaz7d" target="_blank">http://doodle.com/4ytu2b3b5gqqaz7d</a><br>
>>><br>
>>> Thank you,<br>
>>> Ellie<br>
>>><br>
>>> Elena Long, Ph.D.<br>
>>> Post Doctoral Research Associate<br>
>>> University of New Hampshire<br>
>>> <a href="mailto:elena.long@unh.edu">elena.long@unh.edu</a><br>
>>> <a href="mailto:ellie@jlab.org">ellie@jlab.org</a><br>
>>> <a href="http://nuclear.unh.edu/~elong" target="_blank">http://nuclear.unh.edu/~elong</a><br>
>>> <a href="tel:%28603%29%20862-5312" value="+16038625312">(603) 862-5312</a><br>
>>><br>
>>>> On 04/01/2014 11:07 AM, Long, Elena wrote:<br>
>>>> Good morning,<br>
>>>><br>
>>>> Since we last had a b1 meeting, a lot has happened. I was wondering if<br>
>>>> we could schedule a meeting to re-group and plan a path forward,<br>
>>>> particularly given the target discussions that happened during the<br>
>>>> Tensor Workshop. Would next Thursday (4/10) at 1:30pm work for<br>
>>>> everyone?<br>
>>>><br>
>>>> Take care,<br>
>>>> Ellie<br>
>>><br>
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