adrian,
no one updates the numbers in the elog, so rely on
/home/daq/blast/pro2004/analysis/RUNLIST-H2.2
until the database is cleaned up.
--chris
Adrian T Sindile wrote:
> Hi!
> I am a little confused by the numbers below.
> I have been looking on elog, compared with the MySQL database info etc.
>
> It looks like immediately after switching to polarized H2, runs
> between 12144 and 12187 were at a target spin angle of 20 degrees (is
> that right or just wrong epics read-back and if right why is it not
> mentioned anywhere else?)...
> After that, runs 12188 to 12274 are at a target spin angle of 48
> degrees, but the total is 20 kC not 12 kC as mentioned below (maybe
> some of them were mistakingly marked as valid or the below info was
> not up-to-date?)...
>
> Anyway, most importantly, Karen's email from 4PM yesterday says we are
> running at 48 degrees and will continue like this, while all run
> numbers since 12276 (Tuesday!) up to now have a target spin angle of
> 32 degrees.
>
> I am just confused by the disagreement between what I see on elog and
> in these various emails... can anyone explain, please?
> Thanks you!
>
> Adrian
>
>>> We are back up to 165 mA on ABS hydrogen. The cell temperature
>>> is down a bit, now at 120 K. Beam lifetime is about 30 minutes. We
>>> have collected 30 kC on polarized hydrogen since 10/28. Almost 12
>>> kC were at 48 degrees spin angle, the rest are at 32 degrees. The
>>> target polarization is measured to be independent of spin angle.
>>> The product of beam and target polarizations is about 0.45, for a
>>> target polarization of about 67%. Chris Crawford gets about 75%
>>> with tighter cuts.
>>
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