Affiliations: Department of Physics, Keele University, Keele, Staffordshire ST5 5BG, U.K. | ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 OQX, UK | Dipartimento di Fisica, Universitá di Perugia, Via A.Pascoli, 1-06100 Perugia, Italy, Istituto di Struttura della Materia del Consiglio Nazionale delle Ricerche, Via E.Fermi 38, 1-00044 Frascati, Italy
Note: [] Corresponding author. Tel.: UK + 782 583317. Fax: UK + 782 711903.
Abstract: The triple axis spectrometer (TAS) has long been the mainstay for measuring excitations in single crystal samples. In a recent paper Dorner has claimed that the TAS would be the instrument of choice for such measurements at any future high flux spallation neutron source. However, a comparison of the operational characteristics of a TAS and those of direct and indirect geometry time of flight spectrometers for this type of measurement at a pulsed source shows that the TAS would not in fact be a particularly competitive instrument for this purpose.
