| 发明名称 |
Magnetic field homogeneity |
| 摘要 |
An NMR instrument incorporating a cryogenic (23) magnet includes a constant pressure device (32) to maintain the pressure of cryogenic vapors at a constant value whereby a stable magnetic environment is maintained. |
| 申请公布号 |
US4757261(A) |
申请公布日期 |
1988.07.12 |
| 申请号 |
US19870044940 |
申请日期 |
1987.04.30 |
| 申请人 |
VARIAN ASSOCIATES, INC. |
发明人 |
KNEIP, JR., GEORGE D. |
| 分类号 |
F17C13/02;G01R33/28;G01R33/3815;H01F7/20;(IPC1-7):G01R33/20 |
主分类号 |
F17C13/02 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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