RHIC Startup: Maintenance Day is underway..
Using dAu81 lattice (reduced beta* in Yellow), obtain 85kHz of ZDCs for per bunch intensities of 0.85 for both Au and d. The measured beta* in Blue was 0.91/0.93 H/V, and for Yellow, the beta* is 0.81 for Horizontal. Mei did these studies. The displacement of the beta* minimum from the real interaction point is 0.8m in Blue and 0.3m in Yellow. This could be a big effect, since a 1 meter displacement has the effect of reducing the effective luminosity by a factor of 2.
Experiment background rates were measured as comparable to the larger beta* lattice.
There is a debate about how to best scrub the vacuum out.
| Scheduling Physicist: Mike Sivertz | Last updated: |
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