Dear Collaborator, We are again experience problems with the 4032 HV system that daisy chains 6 essential HV systems for BB, Mult , Gating grids, and TOFW calibration slats. These stopped working around noon today, and despite numerous efforts the crate could not cycled into operation. I therefore requested an emergency access period of 3-4 hours which will take place tomorrow. There is no guarentee we will identify the problem isolate and replace the faulty modules. Pending investigations it may be necessary to disbale parts of the experiment until we getr a long access period. This is unfortunate since the up-coming weekend + laboour day vacation has been planned as a long period for physics running without development work. On the positive front progress has been made on setting up the ZDC without saturations, and a short run to-day confirmed that we properly observe the 1n, 2n peaks in the spectrum. It is increasingly clear that problems develops slowly, so it is of uttermost importance that the shift people monitor scalers, rates, spectra to catch problems early. Please help out in this effort. Flemming ------------------------------------------------------ Flemming Videbaek Physics Department Brookhaven National Laboratory tlf: 631-344-4106 fax 631-344-1334 e-mail: videbaek@bnl.gov
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