The Los Alamos Spallation Driven Solid Deuterium Ultracold Neutron Source: Working Notes of March 30, 1998 with Embellishment

The working notes which led to the physics demonstration ultracold neutron source that has been operated at Los Alamos are transcribed here. In addition to the transcribed notes, included are a Prologue that describes the path that led to be basic idea, and an Epilogue that describes some of the discoveries in the implementation of the idea.