公开(公告)号：FR2365123A1

公开(公告)日：1978-04-14

申请号：FR7722465

申请日：1977-07-13

Applicant: IBM

Inventor： DOUBLE GLEN P ,  KAHWATY VINCENT N ,  RANDALL JAMES D ,  REINHART FRITZ M

IPC: G01R33/387 ,  G01R33/383 ,  G01N27/78 ,  H01J39/34

公开(公告)号：CA1089006A

公开(公告)日：1980-11-04

申请号：CA287051

申请日：1977-09-20

Applicant: IBM

Inventor： DOUBLE GLEN P ,  KAHWATY VINCENT N ,  RANDALL JAMES D ,  REINHART FRITZ M

IPC: G01R33/387 ,  G01R33/383 ,  H01F7/00

Abstract: NMR MAGNET ASSEMBLY WITH POLE FACE PARALLELISM ADJUSTMENT A nuclear magnetic resonance (NMR) magnet assembly includes two pole faces spaced to provide a gap in which is established a uniform magnetic field. The pole pieces have pole faces that are flat and parallel. The pole pieces are mounted on support plates one of which is fixed and the other of which is movable about a pivot point with two degrees of freedom of movement in response to adjustment of two adjustable mechanisms. Each adjustment mechanism includes a differential screw that produces a transverse movement and a longitudinally inclined pin or pins that translates such transverse movement into a much greatly reduced longitudinal movement. The combination of a differential screw and inclined pin provides a very fine adjustment of the parallelism of the pole faces. Each mechanism further includes means for providing a coarse adjustment.