Study of the high energy diagnostic neutral beam characteristics of TdeV on its test stand

Summary form only given, as follows. Development of a high energy (40 kV, 1A) neutral beam injector for diagnostic applications on TdeV is near completion. The beamline together with its differential pumping chamber has been installed on a test stand for characterization. The injector uses a duoPIGatron source, and it operates with the source at ground potential and the neutralizer canal at /spl les/-40 kV. The electrons in the neutralizer canal are retained by an electrostatic trap. The residual ions are collected near ground potential. Several diagnostics including calorimetry, visible spectroscopy, infrared imagery and a scanning multi-pin open probe array have been used to study the beam characteristics. We are in the process of characterizing the extracted full beam current.