Log entry time 08:33:01 on July23,2004

Entry number 129383

♦ owl shift summary - 07/23/04 ♦



Did septum scan until CHL trip.  see halogs 129359 and 129367



2311:0006       run 3068, 100k, IHWP = IN, production in right arm while ramping up left arm

0009:0013       run 3069, junk

0015:0025       run 3070, 20k, IHWP = IN, background study , left = 3.160 GeV (+6.4%)

0025:0058       setting left HRS = 2.9710 GeV & septum read (set) = 192.75 A (193.00 A)

0028:0058       run 3071, 53k, IHWP = IN, production in right arm while setting left arm

0100:0110       run 3072, 18k, IHWP = IN, septum scan -29.9% (2.0820 GeV)

0110:0126       setting septum read (set) = 233.75 A (234.00 A)

0127:0137       run 3073, 18k, IHWP = IN, septum scan -15.0% (2.5248 GeV)

0137:0149       setting septum read (set) = 253.25 A (253.50 A)

0149:0158       run 3074, 17k, IHWP = IN, septum scan -7.9% (2.7355 GeV)

0158:0205       setting septum read (set) = 264.00 A (264.50 A)

0200            bleedthrough = 0.77%, halog 129347

0205:0215       run 3075, 18k, IHWP = IN, septum scan -4.0% (2.8516 GeV)

0215:0223       setting septum read (set) = 275.25 A (275.50 A)

0223:0229       run 3076, 12k, IHWP = IN, septum scan +0.1% (2.9731 GeV)

0229:0306       setting septum read (set) = 316.75 A (317.00 A)

0232:0305       run 3077, 60k, IHWP = IN, production in right arm while setting left arm

0306:0316       run 3078, 18k, IHWP = IN, septum scan +15.2% (3.4214 GeV)

0316:0412       setting septum set = 358A, reached read = 342 A.

0322:0412       run 3079, 89k, IHWP = IN, production in right arm while setting left arm, target HPH prproblem at about 50k for about 3k (halog 129356, end of run is septum scan ~+24% (~3.6833 GeV)

0434:0705       run 3080, pedestal run

0408:0800       At 0408, the CHL tripped.  It was due to some power supply failure of a CAMAC for a cold compressor.  At about 0630 out target started warming up due to a loss of CHL flow.

We talked to Dave Meekins and he said that there is nothing that we can do but to close the JT valve.  At 0640, discussions started about whether we would be amenable to doing a spot change.

At the end of the shift, the target temp is 95K+.

see halogs 129358, 129361, 129363, 129364