Chi,
It's interesting that you can observe degradation in the resolution from
1-2 hours of hydrogen data with modest flow rate. Perhaps we should be
including an occasional unpolarized hydrogen run as a periodic systematic
check. With the buffer system in reliable operation, it doesn't take too
long to make the change.
Bill
On Mon, 23 Feb 2004, Electronic Log Book wrote:
> Operators: adrian zhangchi shino
>
>
> at 5pm, all 4 HV crates had to be power recyled.
>
> L21 guard wire tripped and kept tripping, Doug gave instructions to recover that.
>
> D2 data takiing, smooth. had to deal with some trippings like usual.
>
> the two H2 runs after changing the timing coin window, show worse angular and vertex resolution, 1.5deg now. Doug had an email pointing out WC t0 shift.
>
>
-- ********************************************************************** Wilbur A. Franklin * Phone: 617-253-9518 Bates Linear Accelerator Center * FAX: 617-253-9599 P.O. Box 846 * Email: wafrankl@mit.edu Middleton, MA 01949 * **********************************************************************
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