A simple and inexpensive automated pulse programmer for pulsed NMR

Abstract

<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:arial;mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa"="">A <span style="font-size:11.0pt; line-height:115%;font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;="" mso-fareast-font-family:"times="" new="" roman";mso-fareast-theme-font:minor-fareast;="" mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"times="" roman";="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">microcomputer (IBM compatible) controlled flexible pulse programmer has been designed and built for using in pulsed nuclear magnetic resonance (NMR) spectrometer is described. It generates pulse sequences required in NMR to measure spin-lattice relaxation time <i style="mso-bidi-font-style:normal">T</i>₁, spin-spin relaxation time <i>T₂ </i>and spin-lock relaxation time <i>T</i>_{<span style="mso-bidi-font-style:italic">3</span>}<i>. </i>The pulse sequence parameters like pulse widths, interpulse intervals, repetition times can be programmed with menu driven software. The pulse widths can be varied from 100 ns to 6.5 ms in steps of 100 ns. The design and operational features of the pulse programmer are described in this paper. The software, developed in Turbo Basic accepts the pulse sequence parameters from the user and generates the pulse sequences as per the specified values, besides controlling the spectrometer and signal average operations.</span></span>