IRCAM ASSEMBLY INSTRUCTIONS

OPTICS ASSEMBLY INSTRUCTIONS

DEWAR BACK

• mount four 32/4 brackets on 29/1 back flange-2
• mount four 32/5 spacers on 32/4 brackets-3

PRIMARY MIRROR

• mount four 32/4 mirror mirror brackets to 32/1 mirror holder-2
• mount three 10-32 screws and lock nuts on 32/1 mirror holder-6
• set heights of screws as follows: ?
• place primary mirror with stripe oriented towards TDC mark on 32/1 mirror holder
• mount spring clip on mirror
• mount 32/2 retainer on holder using spring washers with TDC aligned

RADIATION SHIELD

• mount secondary on 30/1 radiation shield with TDC aligned
• mount 32/3 secondary retainer on 30/1 radiation shield with TDC aligned
• mount 35/3 strap on proper holes of 30/1 radiation shield with washers -16
• mount temperature sensor

ALIGNMENT

• mount radiation shield assembly on primary with TDC aligned-4
• mount primary mirror assembly on back flange with TDC aligned -3
• wrap with MLI
• connect temperature sensor
• mount jig 36/1 on 30/1 radiation shields short tube
• mount jig 36/2 on 30/1 radiation shields long tube
• check that optics are aligned.

FRONT ASSEMBLY INSTRUCTIONS

CONNECTORS AND WINDOW

• mount 35/2A chip connector on 28/1 front flange align TDC -12
• mount stepper connector35/2B on 28/1 front flange align TDC -12
• mount window on 28/1 front flange
• mount 10/1 chassis plate and spacers
• mount electronics-15
• mount 10/[2-5] sides-14

CHIP

• mount four 34/3 fiberglass spacers loosely on 34/4 bracket align TDC -9
• mount 34/4 bracket on 28/1 front flange
• mount 35/4 chip strap on 34/2 chip mount -11
• install MLI underneath
• solder AD590
• solder lower heater
• mount 34/2 chip mount -9
• install 31/1 PC card on 35/6 spacers align TDC -10
• push spacers inward before tightening screws
• push down and tighten align the 8 2-56 screws
• solder chip electronics
• dress leads through slots
• install chip
• install 34/5 chip clip
• install 34/1 chip snout on 34/2 chip mount -8

FILTER WHEEL

• mount stepper on 33/2 filter case so leads are at 9 oclock on 33/2 drawing -19
• mount three 33/7 brackets on 33/2 case -20
• mount 35/3 strap on 33/2 case using washers -16
• mount three 33/6 spacers on 33/8 base watch out for unused holes -13
• mount 33/5 back snout on 33/2 -18
• mount 33/6 spacers on 33/7 brackets -13
• place filters in 33/1 filter wheel -1
• H in filter 0, just clockwise after index hole
• J in filter slot 1
• Ks in filter slot 2
• open filter slot 3
• 33/10 blank in slot 4
• 33/10 blank in filter 5
• mount 33/1 filter wheel on stepper motor
• tighten two 6-32 set screw so that filter wheel is just above bottom of case
• mount 33/3 cover on 33/2 case-7
• mount 33/4 front snout on 33/3 cover -18
• mount entire unit on front flange-5
• wire motor to 35/2B connector
• wire led to 35/2B connector
• wire photodiode to 35/2B connector

COOLER

• mount charcoal trap
• wrap with MLI

FINAL ASSEMBLY

• mount CTI Model 21 90 ^o off of TDC on Dewar so that glass window points to front flange side
• install 36/2 leg on front flange
• place front flange on table face down
• mount 27/1Dewar Body on Front plate note TDC.
• install four clamps starting TDC
• adjust heat straps on top surface of 77 station
• mount 35/5 clamp washer with three 6-32 screws and washers with notch vertical -17
• connect 77K temp sensor to clamp washer
• mount Optics assembly on Dewar note TDC
• adjust rotation angle and tighten clamps
• install cooling strap using remaining 6-32 screw-17
• turn Dewar so window is on top
• connect optics temp sensor to radiation shield
• mount vacuum valve

DISASSEMBLY

• install 36/3 vent plug on valve
• open vacuum valve SLOWLY
• remove valve mount plate
• remove top screw from 35/5 clamp on 77K station -17
• loosen next two screws on 35/5 clamp
• pull out optics cooling strap
• remove optics temperature sensor connector
• remove optics assembly

Last Revised October 2, 2000