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CCR Mössbauer cryostat specifications

	CCS-800
Cooling type	CCR
Temperature range	<4.2 K to 300 K
Typical temperature stability¹	±50 mK
Sample environment	Exchange gas
Optical	✔
Sample change time	5 min
Sample chamber inner diameter	38 mm (1.5 in)
Rotatable sample	✔
Cooldown	2 h to 2.5 h
Cold head location	Bottom
Typical vibrational line broadening	0.01 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 size	57.2 mm (2.25 in) OD
Recommended maintenance	13,000 h

¹Measured with temperature controller

Facility requirements

Water-cooled

CCS-	Cold head	Recommended compressor maintenance interval	Recommended cold head maintenance interval	60 Hz power requirements	50 Hz power requirements	Cooling water requirements	Compressor size
800	-204 -204N	30,000 h	13,000 h	208 to 230 VAC, 1-phase, 2.6 kW	200, 220 to 240 VAC, 1-phase, 2.25 to 2.4 kW	1.9 to 3.8 L/min at 4 to 27 °C	444 mm × 453 mm × 617 mm high; 73 kg
800	-205		10,000 h	200 VAC, 3-phase, 4.6 to 5.6 kW or 460 to 480 VAC, 3-phase, 4.6 to 5.6 kW	200 VAC, 3-phase, 3.6 to 4.8 kW or 380/400/415 VAC, 3-phase, 3.6 to 4.8 kW	4 to 9 L/min at 5 to 25 °C	442 mm × 493 mm × 532 mm high; 96 kg
800	-408		10,000 h	200 VAC, 3-phase, 7.5 to 7.8 kW or 480 VAC, 3-phase, 7.5 to 7.8 kW	200 VAC, 3-phase, 6.6 to 6.9 kW or 380 to 415 VAC, 3-phase, 6.6 to 6.9 kW	6 to 9 L/min at 5 to 25 °C	443 mm × 493 mm × 532 mm high; 100 kg

Air-cooled

CCS-	Cold head	Recommended compressor maintenance interval	Recommended cold head maintenance interval	60 Hz power requirements	50 Hz power requirements	Cooling air requirements	Compressor size
800	-204 -204N	30,000 h	13,000 h	208 to 230 VAC, 1-phase, 2.6 kW	200, 220 to 240 VAC, 1-phase, 2.25 to 2.4 kW	17.6 m³/min (60 Hz) or 14.7 m³/min (50 Hz)	444 mm × 453 mm × 876 mm high; 103 kg
800	-205		10,000 h	200 VAC, 3-phase, 4.6 to 6.4 kW or 460 to 480 VAC, 3-phase, 4.6 to 6.4 kW	200 VAC, 3-phase, 3.6 to 5.4 kW or 380/400/415 VAC, 3-phase, 3.6 to 5.4 kW	17.6 m³/min (60 Hz) or 14.7 m³/min (50 Hz)	442 mm × 493 mm × 889 mm high; 110 kg
800	-408		10,000 h	200 VAC, 3-phase, 7.5 to 8.3 kW steady state or 460/480 VAC, 3-phase, 7.5 to 8.3 kW	200 VAC, 3-phase, 6.5 to 7.2 kW steady state or 380/400/415 VAC, 3-phase, 6.5 to 7.2 kW	23 m³/min	450 mm × 485 mm × 925 mm high; 155 kg

CCS-850 mossbauer spectra chart Shown 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.