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CCR Mössbauer cryostat specifications

 CCS-800
Cooling typeCCR
Temperature range<4.2 K to 300 K
Typical temperature stability1±50 mK
Sample environmentExchange gas
Optical
Sample change time5 min
Sample chamber inner diameter38 mm (1.5 in)
Rotatable sample
Cooldown2 h to 2.5 h
Cold head locationBottom
Typical vibrational line broadening0.01 mm/s
Height (approximate)142 to 168 cm (56 to 66 in)
Weight (approximate)27.2 kg (60 lb) cryostat and 327 kg (720 lb) stand (including lead shielding)
Window block size57.2 mm (2.25 in) OD
Recommended maintenance13,000 h
1Measured with temperature controller

Facility requirements

Water-cooled

CCS-Cold headRecommended compressor maintenance intervalRecommended cold head maintenance interval60 Hz power requirements50 Hz power requirementsCooling water requirementsCompressor size
800-204
-204N
30,000 h13,000 h208 to 230 VAC, 1-phase, 2.6 kW200, 220 to 240 VAC, 1-phase, 2.25 to 2.4 kW1.9 to 3.8 L/min at 4 to 27 °C444 mm × 453 mm × 617 mm high; 73 kg
800-20510,000 h200 VAC, 3-phase, 4.6 to 5.6 kW or 460 to 480 VAC, 3-phase, 4.6 to 5.6 kW200 VAC, 3-phase, 3.6 to 4.8 kW or 380/400/415 VAC, 3-phase, 3.6 to 4.8 kW4 to 9 L/min at 5 to 25 °C442 mm × 493 mm × 532 mm high; 96 kg
800-408200 VAC, 3-phase, 7.5 to 7.8 kW or 480 VAC, 3-phase, 7.5 to 7.8 kW200 VAC, 3-phase, 6.6 to 6.9 kW or 380 to 415 VAC, 3-phase, 6.6 to 6.9 kW6 to 9 L/min at 5 to 25 °C443 mm × 493 mm × 532 mm high; 100 kg

Air-cooled

CCS-Cold headRecommended compressor maintenance intervalRecommended cold head maintenance interval60 Hz power requirements50 Hz power requirementsCooling air requirementsCompressor size
800-204
-204N
30,000 h13,000 h208 to 230 VAC, 1-phase, 2.6 kW200, 220 to 240 VAC, 1-phase, 2.25 to 2.4 kW17.6 m3/min (60 Hz) or 14.7 m3/min (50 Hz) 444 mm × 453 mm × 876 mm high; 103 kg
800-20510,000 h200 VAC, 3-phase, 4.6 to 6.4 kW or 460 to 480 VAC, 3-phase, 4.6 to 6.4 kW200 VAC, 3-phase, 3.6 to 5.4 kW or 380/400/415 VAC, 3-phase, 3.6 to 5.4 kW17.6 m3/min (60 Hz) or 14.7 m3/min (50 Hz) 442 mm × 493 mm × 889 mm high; 110 kg
800-408200 VAC, 3-phase, 7.5 to 8.3 kW steady state or 460/480 VAC, 3-phase, 7.5 to 8.3 kW200 VAC, 3-phase, 6.5 to 7.2 kW steady state or 380/400/415 VAC, 3-phase, 6.5 to 7.2 kW23 m3/min 450 mm × 485 mm × 925 mm high; 155 kg


CCS-850 mossbauer spectra chartShown to the right are Fe57 Mössbauer spectra (dots) of a 25 µm iron metal foil at 298 K with the CCR off and on. The velocity scan of ±2 mm/s covers only the innermost lines of the iron metal sextet. Also shown are least squares fits (lines) of a symmetric quadrupole pair with Lorentzian line shapes to each spectrum. The results of the fits were linewidth estimates of 0.234 mm/s with the CCR off and 0.241 mm/s with the CCR on. The uncertainty in the line width estimates due to the counting statistics is ±0.002 mm/s.

NOTE: Data provided by Science Engineering & Education Co. (SEE Co. — formerly Web Research Co.), http://www.seeco.us. Special thanks to Professor Darby Dyar, Mount Holyoke College.