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User name Calarco
Log entry time 15:51:08 on June 4,2000
Entry number 43098
keyword=Shift Summary
Continuation of running at Theta_CM = 155, Phi_CM = 180:
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6.9M events up to now (to end of run 1771)
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Run 1772 ... 1.25M events
Run 1773 ... 1.25M events
Run 1774 ... 1.25M events
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We are monitoring the ph1c12 x-position indicator which is in the dispersive
section of the arc. Arun tells us the dispersion is 4 m per fractional change
in energy. We are observing a slow drift that has gone from -0.4 mm to
+0.25 mm over a period of 50 minutes with one large excursion to -2.0
mm which appeared to be precipitated by a loss of current and which
lasted for about 5 minutes. Thus the slow drift indicates an increase
in beam energy of 1.6 parts in 10^4 with a brief negative excursion of
5 parts in 10^4. See picures in entries on "Energy Fluctuations".
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Run 1775 ... 1.25M events
Run 1776 ... HARP scan run 925.dat (see halog entries)
Run 1777 ... 1.25M events
Run 1778 ... 1.25M events
Run 1779 ..... 0.7M events, ROC 14 crashed, lost about 1/2 hour total
Run 1780 ... 1.25M events
Run 1781 ... 1.25M events, 17.6M total events