Summary for 6/12/00  8:00-16:00
On Shift: JK,SS
Log Book #8 Pages 82-86

Run Summary:

1P1 (3528.5 MeV)
Beginning Current : 27.4 mA
Final Current     : 22.7 mA
Typical Luminosity: 2.5x10^31 cm^-2 s^-1
Typical Beam Width: 1.5 MeV/c

Run    Integrated Luminosity
5811   341 nb^-1
5812   Handed over to Evening Shift


Comments:

 8:30  Keith arrives to help with the unresettable DAQ hanging (see owl shift
       summary). We have left the gas Jet on while the problem is being fixed
       since, as Giulio pointed out, it is perhaps better to lose 0.7 mA/hr
       for an hour than take a chance on losing much more by turning the Jet
       off and on and introducing a potential instability into the beam.
 9:15  DYC's 3&5 were replaced, but that didn't fix the problem. Keith surmised
       that the problem was due to double pulsing somewhere. He traced the signal
       back to a discriminator with a coupled output where the other output was
       terminated. After moving to an uncoupled output, the problem went away.
       The terminator tested ok, so the coupled output is assumed to be bad.
       For the record, the potentially bad coupled outputs are the lower left
       on the discriminator in slot 4 of rack 11.
 9:28  Run 5811 begins.
13:46  Run 5812 begins.


Good Afternoon,
Jason & Seon-Hee
 that didn't fix the problem. Keith surmised
       that the problem was due to double pulsing somewhere. He traced the signal
       back to a discriminator with a coupled output where the other output was
       terminated. After moving to an uncoupled output, the problem went away.
       The terminator tested ok, so the coupled output is assumed to be bad.
       For the record, the potentially bad coupled outputs are the lower left
       on the discriminator in slot 4 of rack 11.
 9:28  Run 5811 begins.
13:46  Run 5812 begins.


Good Afternoon,
Jason & Seon-Hee