Begin forwarded message:
> WC L23 and L24 have been repaired. Broken sense wire replaced.
>
> There is a short in the holding field magnets so these can not be used
> for the immediate future.
>
> Additional mu-metal has been wrapped around the beampipe downstream of
> the target chamber.
>
> Plan for this evening:
>
> 1. re-establish beam tune for B=0
> - allow CCR some time (~2 hr) to try to improve lifetime and BQM
> rates over what was achieved last night
> 2. test with unpolarised H2 at 0.1 sccm
> - if WC's light up (look at nsed) then try empty target
> if empty target looks bad this would suggest the problem is with
> the tune and you might try improving the tune further
> - if WC's look good (ie tracks are clearly identifiable with little
> surrounding noise) then collect data for remainder of night
> 3. assuming running with B=0 is not useful then try B=10%, 20%, and
> 35% to find lowest field required to get useful running conditions.
> 4. if B=10% is okay try 5% and then collect data for the rest of the
> night at the lowest good field setting.
>
> At 07:30 Tuesday morning the hall will be opened briefly to reverse
> the field polarity.
>
>
> Cheers,
>
> Douglas
>
> 26-415 M.I.T.
> Tel: +1 (617) 258-7199
> 77 Massachusetts Avenue Fax: +1 (617)
> 258-5440
> Cambridge, MA 02139, USA E-mail: hasell@mit.edu
>
>
Cheers,
Douglas
26-415 M.I.T.
Tel: +1 (617) 258-7199
77 Massachusetts Avenue Fax: +1 (617)
258-5440
Cambridge, MA 02139, USA E-mail: hasell@mit.edu
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