公开(公告)号：DE2632035A1

公开(公告)日：1977-03-17

申请号：DE2632035

申请日：1976-07-16

Applicant: IBM

Inventor： LITZ FRANK ALBERT ,  MATHISEN EINAR SKAU ,  SCHUMANN JUN PAUL AUGUST ,  VALENTINO CARL ROBERT

IPC: H01J9/233 ,  H01J9/44 ,  H01J29/45 ,  H01L31/10 ,  G01N1/00 ,  B65G47/46

Abstract: A charge storage diode array target is provided with a resistive layer over the output side of the target over the diode portions and the area between diodes, with metal contact caps over the resistive layer over the diode portions. The target is operationally aged with input radiation sufficient to produce an output signal current density of at least about 300 nanoamps per square centimeter at a given reverse bias potential, for a period of at least 50 hours. The target thereafter exhibits high beam acceptance and low lag characteristic.

公开(公告)号：DE2801031A1

公开(公告)日：1978-08-17

申请号：DE2801031

申请日：1978-01-11

Applicant: IBM

Inventor： HOFER DONALD CLIFFORD ,  KAHWATY VINCENT NOEL ,  VALENTINO CARL ROBERT

IPC: G05F7/00 ,  G01R33/389 ,  G01R33/46 ,  G01N27/78

Abstract: An NMR (nuclear magnetic resonance) spectrometer has a permanent magnet provided with a field coil. A lock system cyclically pulses a deuterium lock sample to produce a FID (free induction decay) signal that is analyzed by measuring the time interval during which the FID signal crosses the zero axis a predetermined number of times. The measured interval is compared to a predetermined interval or set point, and the current through the field coil is adjusted in the direction tending to correct the field strength so as to maintain the measured interval equal to the preset interval. Such measurement, comparison and adjustment are done several times each second. When the sample is removed, the lock system retains the last field setting achieved with the sample.

公开(公告)号：DE2755091A1

公开(公告)日：1978-07-06

申请号：DE2755091

申请日：1977-12-10

Applicant: IBM

Inventor： HOFER DONALD CLIFFORD ,  KAHWATY VINCENT NOEL ,  VALENTINO CARL ROBERT

IPC: G01N24/08 ,  G01R33/46 ,  G01N27/78

Abstract: A method is described for the quantitative analysis of a solution in which the solvent produces a nuclear magnetic resonant (NMR) spectral peak that dominates the system. A first spectrum containing the peak is made by operation of a nuclear magnetic resonant spectrometer at a first gain setting. The NMR apparatus is a pulse-modulated, Fourier-transform type spectrometer. A second spectrum is produced in which a 180 DEG pulse is applied to invert the spectral component magnetization followed after a period of time by a 90 DEG pulse. The period of time is sufficient to allow the solvent or component producing the unwanted peak to relax from the inverted state to a point where there is minimum magnetization along the longitudinal axis. At this point, in many solutions the other components have completely relaxed so that the 90 DEG pulse produces a free induction decay signal which, after undergoing the Fourier-transformation, yields a spectrum that does not include any significant peak due to the solvent. Thereafter, the quantitative analysis is performed by measuring the areas under the respective component peaks and simultaneously solving a series of equations in which the weight of the various components is proportional to the respective areas under the peaks and to the gain settings of the spectrometer.