• Sustains high vacuum
• Simulates solar radiation (400-kW arc lamp)
• Simulates solar radiation (4-MW quartz heat lamp array)
• Produces cold environments via cryogenic cold wall (-320 °F)
• Provides a high degree of vibration isolation for sensitive optical tests

Test Chamber

• 100-ft diameter by 122-ft.-tall test area
• Designed for external pressure of 2.5 psig
• Designed for internal pressure of 5.0 psig
• Chamber floor designed for a load of 300 tons
• Two 50 ft by 50 ft entrances, 180° apart
• Personnel entry door measuring 8- by 8-ft
• 20-ton vacuum compatible polar crane at top of chamber
• Chamber penetrations for power, data acquisition, and high-pressure liquids and gases
• Concrete chamber enclosure, 6 to 8 ft thickness

Assembly Area

• Adjacent to test chamber
• 75 ft by 150 ft with clear height of 80 ft
• 25-ton capacity overhead crane
• Outside door to assembly area: 50 ft by 50 ft
• Area contains three sets of parallel railroad tracks extending through the building to the east railroad spur
• Rolling rail stock can progress through into the assembly area, the test chamber, the disassembly area and out of the facility on the west rail spur

Disassembly Area

• Adjacent to test chamber
• 70 ft by 150 ft with clearance of 76 ft
• 6-ft-thick concrete walls for radiation shielding
• Extensive ventilation and contamination control
• Large capacity blowers for positive or negative pressure

Vacuum Pumping System

• Sixteen 48 in diameter LN2-baffled electrically heated, oil diffusion pumps (pumping speed - 700,000 liters/s)
• Ten 48 in diameter cryopumps with vacuum isolation gate valves (pumping speed - 600,000 liters/s)
• Pumpdown Times:
  Atmospheric pressure to 20 torr: 2 hrs
  20 torr to 10^-3torr: 4 hrs
  10^-3 torr to 10^-6 torr: 2-6 hrs

Water Systems

• Cooling tower water to dissipate waste heat produced by such devices as GN2 compressors and vacuum pumps
• Domestic and fire water: 150,000 gallon water tower
• Demineralized water system

Gas Systems

• Gaseous nitrogen (bottle farm): 31,000 scf at 1530 psig
• Gaseous nitrogen (trailer): 70000 scf at 2400 psig
• Helium: 220,000 scf at 2800 psig

Cyroshroud

• 40-ft diameter by 40-ft-high cold wall
• Can be configured inside the test chamber
• Cyroshroud is 42 ft wide by 80 ft long with a 22-ft height
• Ten individual zones with separate temperature control
• Temperatures from ambient to -250 °F
• Temperature transition of 1 °F per min

Cyrogenic System

• Capable of removing 14 mW of heat from cold
  walls or cyroshroud

Thermal Systems

• 7 mW of power available for Infared heat lamps
• 400 kw solar simulator

Data Systems

• Facility data system
• Slow speed test data acquisition system (1 Hz continuous)
• High-speed test data acquisition system (100 KHz sampling rate using Sigma Delta sampling)