Operator(s) : E.Gudmundsson
Purpose : Test of the rayleigh system after lamp test.
Date(s) : 980923 - 980924 File(s) : L9809230 - L9809230 Comments : During the last run the rayleigh laser/receiver began showing signal fluctuations @30km that the sodium system did not show. this meant that there was something wrong with the rayleigh system. As the rayleigh laser flashlamps were at 27 million shots, all the flash lamps were replaced. The flaky amplifier trimpot was replaced in the process. The energy did not seam to come up to the usual 580mJ after the lamp replacement. In order to see if the signal from the Rayleigh system was varying as it was during the last run, this test was done. Conditions were not so good , a bit claudy, but the Reyleigh signal variations correlated nicely with the variations in the sodium channel. This indicates that the fluctuations are gone but the energy question remands to be addresed. This will be done the next clear night. Logfile : l9809230.log