MAGNETIC RECORDER FOR NUCLEAR PULSE APPLICATION (Covering the Period from August 6, 1959 to October 5, 1959)

摘要

The storage technique appears especially useful for low level counting experiments and for ex¬periments where two complex spectra are to be recorded simultaneously for later coincidence analysis. It is necessary to stretch the pulses from a scintillation counter in order to be compatible with the approximate 15 kilo¬cycle bandwidth available from conventional tape recorders operating at 7. 5 inches per second tape speed.nDuring the recording and playback process an instrumental line width of approximately three percent is introduced for large pulses and reduces the resolution of the original data. Inhomogeneity in magnetic tape materials and variations in instantaneous tape speed and tape to head contact effects apparently cause this line width, and one of the objectives of this program is to determine the nature of the spread and to determine the best resolution that can be achieved with moderate cost equipment operated by unskilled or semi-skilled personnel.