Janis Research, cryogenics, cryostats

Mössbauer Spectroscopy Systems

CCS-850

Mossbauer Spectroscopy 10 K Closed Cycle Refrigerator Systems - Janis Research, cryogenics

Designed specifically for Mössbauer spectroscopy, the model CCS-850 includes design features optimized specifically for this application. The most critical requirement for successful measurements is isolation of the sample from the refrigerator vibrations. In order to achieve this isolation, a flexible bellows assembly is installed between the sample support flange and the refrigerator body. The support flange is mounted to an independent table or frame (either customer or Janis supplied), and the flexible bellows dampen vibrations before they reach the sample support. Typical line broadening of .01 mm/s is achieved through this technique. The sample support rod is suspended within a copper cylinder (with mylar windows for maximum gamma transmission.) The sample is cooled indirectly, using static helium exchange gas inside the sample chamber. This arrangement permits samples to be quickly exchanged (via top loading access) without warming the entire cryostat. It is also ideal for uniform cooling of poor thermally conducting samples, such as foils and powders.

Click here for Fe57 Mössbauer spectra and photo.

Features:
  • Vibration isolation mounting stand
  • Vibration isolation bellows
  • Isothermal static helium gas sample chamber
  • Optical vacuum jacket and radiation shield (with two mylar windows)
  • Gold plated OFHC copper sample holder
  • 10-pin electrical feedthrough for customer wiring into the sample area
  • Two spare electrical access ports
  • Evacuation valve and safety pressure relief
  • Model 8200 compressor and 10' gas lines
Available options:
  • Additional electrical feedthroughs (BNC, SMA, multipin, and others)
  • Additional optical window ports
  • Larger or smaller diameter sample chamber
  • Custom configurations
Specifications CCS-850
Vibrational line broadening

.01 mm/s*

Temperature range ~15 K - 300K
Initial cooldown time ~3 hrs. to 15 K
Subsequent cooldown time (300 K to 15 K) ~2 hrs.
Sample change time 2 min.
Cooling power ~0.35 watts @ 20 K
System weight 190 lbs.
Cold head weight 30 lbs.

*With proper mounting
Table of Contents
Pages
Introduction 1, 2
CCS-150 & CCS-450 Standard Optical Systems 3, 4
CCS-100/202 & CCS-100/204 Standard Optical Systems  5, 6
CCS-350, CCS-350S & CCS-350R Compact Optical Systems 7, 8
CCS-250, CCS-350T & CCS-350ST Non-Optical Systems 9, 10
CCS-550, CCS-550T, CCS-950, CCS-950T Top Loading Exchange Gas Systems 11, 12
CCS-750 Vibrating Sample Magnetometry Systems 13
CCS-850 Mössbauer Spectroscopy Systems 14, 15
Other Systems (including CS-1020) 16
Model 8200 Compressor Specifications 17
Options and Accessories 18
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JANIS RESEARCH COMPANY, INC.
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E-Mail: sales@janis.com
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