Instrumental Equipment

Abstract

analyzing magnets, focusing lenses, goniometers, detection devices, and related equipment are reviewed in detail in classic IBA handbooks(I,2) with abundant literature references and excellent recommendations for proper operation. Here we focus on equipment especially adapted to ERDA and topics that require more attention due to the particular requirements of ERDA. Our purpose is to give a sufficient extent of experimental details for any IBA user interested in performing elastic recoil measurements.As a matter of fact, in Chapters 5-9, we describe and illustrate different versions of elastic recoil spectrometry. Some information concerning specific detection devices were yet given. In the following sections, we describe a typical experimental set-up required to carry out ERDA investigations. From the ion accelerator to usual detection devices, each element is briefly presented. Furthermore we emphasize the analytic constraints and the maximum performance allowed by recent technical developments. ACCELERATOR AND RELATED EQUIPMENT AcceleratorThe most currently used accelerators for IBA purpose are of the electrostatic type. The literature has produced several excellent reviews about the physics of these devices, for example Refs. 3 or 4. Recent instrumental improvements are illustrated in specific documents. (5) Three types of machines have essentially been used for ERDA applications a long time to produce the required incident ion beam: single-ended Van de Graaff accelerators, *The authors wish to thank Ph. Trouslard for his kind contribution to this chapter. 2-4/ J. Tirira et al., Forward Recoil Spectrometry