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HIGH VACUUM CHAMBER
PLAN VIEW SHOWING THE SIX RADIAL PORTS

COMPONENTS (IN CLOCKWISE ORDER STARTING AT THE FAR LEFT)

1.  RIGHT-ANGLE VACUUM VALVE
    (FAR LEFT, 0 degree position)
2.  THERMOCOUPLE VACUUM GAUGE
    AND UP-TO-AIR VALVE (45 degree)
3.  DUAL THERMCOUPLE
    FEEDTHROUGH (90 degree position)
4.  PORT FOR ION PUMP
    (FAR RIGHT, 180 degree position)
5.  PORT FOR RGA TUBE (BOTTOM)
6.  BOURDON VACUUM GAUGE
    (315 degree position)
7.  OPTICAL WINDOW (CENTER OF
    TOP 10"OD C.F. FLANGE)
ELEVATION VIEWS OF THE VACUUM CHAMBER ON A MOBILE STAINLESS STEEL CART
WITH THE MODULAR POWER CONTROL UNIT AND MECHANICAL 2-STAGE VACUUM PUMP
INTERIOR VIEW OF THE
VACUUM CHAMBER WITH

1.  THE HEATER ASSEMBLY
    ON A THERMALLY ISOLATED
    SUPPORT STAND
2.  TYPE "S" THERMOCOUPLE
    WITH THE LEADS CONNECTED
    TO THE VACUUM  FEEDTHROUGHS
3.  THERMAL RADIATION SHROUD
     AROUND THE HEATER ASSEMBLY