An iron-yoked superconducting magnetic lens

✍ Scribed by I.I. Goncharenko; I.S. Sidorenko; G.M. Skoromnyi

• Book ID: 103049507
• Publisher: Elsevier Science
• Year: 1971
• Tongue: English
• Weight: 207 KB
• Volume: 11
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(71)90194-9

✦ Synopsis

Co are changed. The switch S changes the amplification factor by ten and is for liquid helium/nitrogen in the position 1/2. All operational amplifiers used are of the type NS LM 301 A.

The electronics system follows the bridge unbalance voltage U linearly and disturbs the bridge negligibly. Calibrations carried out for helium and nitrogen fit the dependences predicted for the bridge working to the infinite impedance within 2% at all points. Drift of the system is ~ 4% of full scale in about twelve hours for liquid helium sensitivity and about ten times less for liquid nitrogen sensitivity. The stability could be improved by the use of more stable operational amplifiers. I wish to thank Prof S. B. Woods for his interest in the work and for reading the manuscript.