1、Lessons Learned Entry: 0526Lesson Info:a71 Lesson Number: 0526a71 Lesson Date: 1994-08-25a71 Submitting Organization: LARCa71 Submitted by: Bernard LewisSubject: Magnetic Field Distribution in the Magneto-Optic Imaging Instrument Description of Driving Event: One of the most important elements for t
2、he further improvement of the performance of the magneto-optic imaging instrument is to quantify the contribution of each different mechanism to the obtained image. More experiments were recently performed using a single-layer thick pancake pickup coil so that the distribution of flaw-induced normal
3、 magnetic field component may be measured between the test object and the current sheet, as well as at locations above the current sheet. The test used magnetic current sheet, which has very strong skin depth attenuation. As expected, a distribution of strong magnetic fields exists in between the tw
4、o conducting sheets; no measurable field strength exists above the magnetic current sheet. Further experiments are being conducted with the new pickup coil to establish a firm theoretical base.Lesson(s) Learned: In the magneto-optic imaging instrument, a distribution of strong magnetic field exists
5、in between two conducting sheets, while no measurable field strength exists above the magnetic current sheet.Recommendation(s): The distribution of flaw-induced normal magnetic field component in the magnetic-optic imaging instrument has been measured between the test object and the current sheet as
6、 well as at locations above the current sheet.Evidence of Recurrence Control Effectiveness: N/AProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Documents Related to Lesson: N/AMission Directorate(s): N/AAdditional Key Phrase(s): a71 Research & Developmenta71 Test & VerificationAdditional Info: Approval Info: a71 Approval Date: 1997-04-02a71 Approval Name: Elijah C. Kenta71 Approval Organization: 421a71 Approval Phone Number: 757-864-3345Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
