Fundamental Technologies

Voyager LECP Pages

The Johns Hopkins University
Applied Physics Laboratory
April 3, 1978


Dr. T. P. Armstrong
Department of Physics
University of Kansas
Lawrence, Kansas 66044


On 27 March 78, I ran a dead-layer test on the spare d detector.*   SMK suggested I send you a copy of the results.

The detector, itself, is one that ORTEC made as part of the same batch from which the detector in the a location of VOYAGER-1 came. The test, using electrons and protons from the GSFC accelerator, was basically the same as Ted Fritz described in Appendix E of the JOP proposal. The pulse-height-analyzer and pulser were calibrated using the 59.6 KeV x-ray line from Am241 in our b detector.

The actual results of the test are shown on the accompanying figure. Our detector, which ORTEC listed as having 40.1 mg/cm2 Al, is presented by the closed circles. The open circles are data given by Ted Fritz in the JOP proposal for an off-the-shelf ORTEC detector with 40.2 mg/cm2 of Al. The similarity suggests we have a good data set here, although the results do not lead one to a great deal of enthusiasm.


J.W. Kohl

(* Corrected by editor - changed from β to d.)

Return to Voyager LECP Data Analysis Handbook Table of Contents.
Return to Fundamental Technologies Home Page.

Last modified 8/15/05, Tizby Hunt-Ward
Original page by I. Robertson