Tsunami - Beckman Institute Laser Resource Center

Tsunami
recommend using 99.999% pure, dry, oil-free, Electronic Grade 5
nitrogen at a starting purge rate of 0.3 m3/hr (10 SCFH) for at least 2 --
hours, then reducing it to 0.17 m3/hr (6 SCFH) for the duration of the
experiment. The purge can be reduced to 0.014 m3/hr (0.5 SCFH) for
all other wavelengths.
a. Verrfy the laser head cover is in place and clamped down, sealing
the cavity.
b. Verify the nitrogen tank output regulator is set to minimum, then
turn on the nitrogen supply.
c. Set the output regulator to limit pressure to less than 67 kPa (10
psi).
d. Open the Tsunami purge bleed valve (Figure 7-2).
e. Use the Model 3910 flow control to set the nitrogen flow rate as
outlined above (Figure 4-9).
Continue on to "Optimizing Laser Output."
1
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Figure 7-1: lhnsmittance vs. Wavelength for Oxygen and Water Vapor.