Precision II Operation and Maintenance Manual C
5-24
996-0255 rev. b
J. Quartz rotator alignment procedure for Precision II 9000
The quartz rotator, P/N 199-0067, converts horizontal polarization to
vertical and vertical polarization to horizontal. With the rotator between
the two amplifier rods, the depolarization due to birefringence in the first
rod is undone by the second rod.
1) Remove any waveplates from in front of the amplifiers.
2) Place a Glan Taylor or dielectric polarizer after the second
amplifier. With the rotator in place most of the energy will
be converted to vertical polarization and therefore re-
jected off the Glan Taylor (or dielectric). Be sure to dump
the rejection.
3) Place a power meter to measure the beam transmitted
through the Glan Taylor. This should be weaker than the
rejected beam.
4) With the oscillator Q-switching and the amplifiers on,
adjust the quartz compensator by rotating the mount to
minimize the power transmitted.
K. Amplifier Alignment Single Rod Heads for Precison II 8000
Equipment needed:
• burn paper
• clear plastic bags
• 1 metric Allen wrench set
• 1 Phillips screwdriver
• high density styrofoam beam dump
1) For this alignment the amplifier must be turned off. To
turn off the amplifier do the following:
a. Turn off rack main breaker located front right hand
corner.
b. At rear of rack remove cover plates so that you can
access rear of amplifier capacitor bank CB631C or
CB632C.
c. Disconnect at rear of capacitor bank the High
Voltage BNC that runs from power unit to capacitor
bank.
To Next Page
Loading...
Need help?
General