A slow scan SEC vidicon system is described here. This system is coupled to the 152.4-cm (60-in) McMath telescope at Kitt Peak National Observatory. An anamorphic lens system is used to couple optically the vertical spectrograph to the vidicon system. The resolution of the over-all system is 55 mÅ, while the resolution of the spectrograph alone is 50 mÅ. Actual observational results are used to evaluate the system performance.
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F = fast scan and high beam intensity, Slo = slow scan and low beam intensity, x = irrelevant. Sc = scan starts automatically, M = manual start. O = over scan, N = normal scan.
Scan beam focusing is controlled by EG3/EG4. At low (L) fields focusing is absent, at high (H) fields focusing is present.
Voltage between high (H) and medium (Med) is ΔV = 0.3–0.6 V, between medium (Med) and low (L) is 2–3 V. Nominally the voltage at high state is 10–12 V. R = automatic cycling, M = manually controlled cycling.