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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-1525
DTSTART:20090507T173000Z
DURATION:PT1H0M0S
DTSTAMP:20260422T214743Z
LAST-MODIFIED:20090504T125845Z
LOCATION:5310  Chamberlin
SUMMARY:Schlieren measurements of Hg density gradients in an ultra-hig
 h pressure arc lamp\, Atomic Physics Seminar-Note special time\, Joe K
 ane\, University of Wisconsin-Madison
DESCRIPTION:A Brewster angle reflection measurement is used to determi
 ne the Hg vapor density at the arc tube wall of an ultra-high pressure
  lamp. The density measurement in combination with the wall temperatur
 e yields a pressure of 201 +/- 11 bar. This lamp pressure in combinati
 on with an arc core temperature measurement yields an arc core Hg vapo
 r density of 1.78 x 10^20 cm^-3\, which agrees with the density from r
 esonance collisional line broadening measurements of the 1014 nm Hg li
 ne. These density results are combined with Abel inverted laser deflec
 tion or schlieren measurements to determine a density/temperature map 
 of the Hg vapor in the lamp. The laser deflection technique is sensiti
 ve in the arc core and mantle\, unlike emission techniques which are s
 ensitive only in the arc core.
URL:https://www.physics.wisc.edu/events/?id=1525
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