Received: from fibi01.fnal.gov by fsgi02.fnal.gov via SMTP (951211.SGI.8.6.12.PATCH1042/951211.SGI) for id IAA25673; Sat, 1 Feb 1997 08:17:29 -0600 Received: from fnal.fnal.gov by fibi01.fnal.gov (AIX 3.2/UCB 5.64/4.03) id AA68935; Sat, 1 Feb 1997 08:17:30 -0600 Received: from fn835c.fnal.gov ("port 4743"@fn835c.fnal.gov) by FNAL.FNAL.GOV (PMDF V5.0-5 #3998) id <01IEW87ENEGW001HTL@FNAL.FNAL.GOV>; Sat, 01 Feb 1997 08:17:32 -0600 Received: from numep1.phys.nwu.edu by fn835c.fnal.gov via SMTP (931110.SGI/930416.SGI) for rray@fnal.gov id AA05110; Sat, 01 Feb 1997 08:23:17 -0600 Received: by numep1.phys.nwu.edu; id AA24512; Sat, 01 Feb 1997 08:15:57 -0600 Date: Sat, 01 Feb 1997 08:15:57 -0600 From: "Todd K. Pedlar" Subject: Shift report, OWL 2/1/97 Sender: todd@numep1.phys.NWU.EDU To: e835weekly@fn835c Message-Id: <32F3501D.15FB@numep0.phys.nwu.edu> Organization: Northwestern University Mime-Version: 1.0 X-Mailer: Mozilla 3.01Gold (X11; I; OSF1 V3.2 alpha) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit On Shift: TP & SB Took over at midnight during run 1108 at root(s) = 3643 MeV. 1108: 310.24 nb^{-1} 1109: 278.91 nb^{-1} Total integrated luminosity taken at 3643 MeV is 1203.63 nb^{-1}. About 4:00 we noticed that the gas jet did not seem to be keeping pace with the beam decrease; i.e. the luminosity was no longer staying constant, in regulating mode. The two density readings "readback" and "calc" on the Mac were very different, not close, as usual. By comparing the luminosity monitor readout and the rates to previous currents and densities, we decided the "calc" value was correct (as usual) and the "readback" value was for some reason too high. If the regulator is set to use this value for the density, then the problem is understandable. If not, then we're not sure what's going on. Perhaps Gabriele can determine the problem.? At any rate, since we had just a short time to go before making the long deceleration to 2950 MeV, we decided to do nothing about it. Inst. luminosity for the run was on average 1.6 x 10^31 rather than the 2.0 which we had wanted. At 5:30, we ended run 1109, and shut everything down for the deceleration to the etac background point of 2950 MeV. Deceleration and cooling were still ongoing at the end of the shift. Cheers, and have a good weekend, Todd & Stefano -- ------------------------------------------------------------------ Todd K. Pedlar - Northwestern University - FNAL E835 Nuclear & Particle Physics Group ------------------------------------------------------------------ Phone: (847) 491-8630 (708) 840-8048 Fax: (847) 491-8627 ------------------------------------------------------------------ WWW: http://numep1.phys.nwu.edu/tkp.html ------------------------------------------------------------------