public:sunnyside:general_information
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public:sunnyside:general_information [2020/04/08 14:53] mel created |
public:sunnyside:general_information [2020/04/08 15:17] (current) mel |
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| =====Sunnyside Mirror Coating Procedure===== | =====Sunnyside Mirror Coating Procedure===== | ||
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| ====Sunnyside 2m chamber description==== | ====Sunnyside 2m chamber description==== | ||
| + | The vacuum chamber diameter: 84” I.D | ||
| + | The vacuum chamber height: 12’ (13’ including hemispherical bottom). | ||
| + | The chamber has one filament ring 71.75” diameter (center of filaments). | ||
| + | The chamber wall to the center of the filaments is 6.125”. | ||
| + | The optimum placement of the surface of the mirror in the chamber is 19” below the chamber lid. | ||
| + | The top of the filaments to the edge of the mirror is 34” (vertical measurement - 72” diameter mirror). | ||
| + | The top of the filaments to the chamber lid is 53”. | ||
| + | The mirrors are held from the chamber lid, the coated surface faces down. | ||
| + | There is one ring of 36 filaments located near the periphery of the chamber, below the mirror. | ||
| + | The filaments are made from 3 strand twisted tungsten wire (individual wire size 0.020”), 6 coils per filament, coiled section of filament 2.5” long, coil diameter 0.44” O.D., overall length of tungsten wire 12.625”. | ||
| + | Deposition material is aluminum, 99.999% purity, 1mm diameter wire, 1.25” or 1.375” long, folded twice, placed on the bottom of each filament loop, total of 216 pieces of aluminum. | ||
| + | The tungsten filaments can be used for two or three shoots before they need to be replaced. | ||
| + | Mechanical pump; Kinney KDH 250 rotary piston pump, pumping speed 248 (cfm) | ||
| + | Roots Blower pump; Kinney KMBV 1300, pumping speed 1300 (cfm) | ||
| + | (2) Diffusion pumps; Kinney KDP-32 (32” diameter) pumping speed 31000 l/s (baffled) | ||
| + | Holding pump; Stokes Microvac 148-H9, pumping speed 40 (cfm) | ||
| + | Rough vacuum pressure is measured with Granville-Phillips Series 275 controllers with Convectron gauge sensors. | ||
| + | High vacuum pressure is measured with Granville-Phillips Series 270 controllers with Bayard-Alpert Series 274 ionization gauges. | ||
| + | The deposition rate and total thickness are measured by a Maxtek TM-100 R, 6.0 MHz quartz crystal microbalance. | ||
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| + | [[.: | ||
| - | * The vacuum chamber diameter is 84” I.D | ||
| - | * The vacuum chamber height is 12’ (13’ including hemispherical bottom). | ||
| - | * The chamber has one filament ring 71.75” diameter (center of filaments). | ||
| - | * The chamber wall to the center of the filaments is 6.125”. | ||
| - | * The optimum placement of the surface of the mirror in the chamber is 19” below the chamber lid. | ||
| - | * The top of the filaments to the edge of the mirror is 34” (vertical measurement - 72” diameter mirror). | ||
| - | * The top of the filaments to the chamber lid is 53”. | ||
| - | * The mirrors are held from the chamber lid, the coated surface faces down. | ||
| - | * There is one ring of 36 filaments located near the periphery of the chamber, below the mirror. | ||
| - | * The filaments are made from 3 strand twisted tungsten wire (individual wire size 0.020”), 6 coils per filament, coiled section of filament 2.5” long, coil diameter 0.44” O.D., overall length of tungsten wire 12.625”. | ||
| - | * Deposition material is aluminum, 99.999% purity, 1mm diameter wire, 1.25” or 1.375” long, folded twice, placed on the bottom of each filament loop, total of 216 pieces of aluminum. | ||
| - | * The tungsten filaments can be used for two or three shoots before they need to be replaced. | ||
| - | * Mechanical pump; Kinney KDH 250 rotary piston pump, pumping speed 248 (cfm) | ||
| - | * Roots Blower pump; Kinney KMBV 1300, pumping speed 1300 (cfm) | ||
| - | * (2) Diffusion pumps; Kinney KDP-32 (32” diameter) pumping speed 31000 l/s (baffled) | ||
| - | * Holding pump; Stokes Microvac 148-H9, pumping speed 40 (cfm) | ||
| - | * Rough vacuum pressure is measured with Granville-Phillips Series 275 controllers with Convectron gauge sensors. | ||
| - | * High vacuum pressure is measured with Granville-Phillips Series 270 controllers with Bayard-Alpert Series 274 ionization gauges. | ||
| - | * The deposition rate and total thickness are measured by a Maxtek TM-100 R, 6.0 MHz quartz crystal microbalance. | ||
public/sunnyside/general_information.1586382789.txt.gz · Last modified: 2020/04/08 14:53 by mel
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