✦ LIBER ✦
Construction techniques for adiabatic demagnetization refrigerators using ferric ammonium alum
✍ Scribed by Grant W. Wilson; Peter T. Timbie
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 96 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0011-2275
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✦ Synopsis
We describe techniques used to fabricate the cold stage of an adiabatic demagnetization refrigerator that uses the paramagnetic salt ferric ammonium alum. We discuss the design of a leak-tight housing for the salt as well as a technique for growing ferric ammonium alum crystals that results in a housing filled with > 98% refrigerant. These techniques have proven to be reliable in creating robust single-stage refrigerators. Similar techniques can be used for the second stage of a dual-stage adiabatic demagnetization refrigerator.