ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
As fusion devices become larger and their environments become harsher for instruments, diagnostics find themselves farther and farther away from the plasma. On TFTR, the UV survey spectrometer SPRED is over 9 m from the plasma. In these conditions, the alignment of the optical axis of the spectrometer to the desired portion of the plasma becomes both more critical and more difficult. We have developed a device which allows visual alignment along an optical axis both back into the spectrometer and toward the plasma. This SPRED alignment mechanism (SPAM) generates forward and backward laser alignment beams which are exactly coaxial, and gives coincident visual sightlines, also coaxial, in both directions. It is compact, hardy, precise, and cheap. SPAM also has been used to align visible and UV spectrometers with equal success.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1141657
Permalink