Fos-Ov 615/715 Focus, X-Pitch and Y-Pitch

Details Fos-Ov 615/715 Focus, X-Pitch and Y-Pitch Fos-Ov 615/715 Focus, X-Pitch and Y-Pitch

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990hst..prop.2189h&link_type=abstract

HST Proposal ID #2189

Physics

Hst Proposal Id #2189

Scientific paper

After warm-up to the nominal high voltage, the trim current is set to zero, and the high voltage to a lower value. Spectra are then obtained with the 0.1-PAIR aperture, G190H, the Pt-Ne lamp, and three different X-BASEs; these will allow the determination of the focus and x-pitch. Measurements with the TALEDs will be obtained through the 0.1-PAIR aperture to determine the y-pitch. The voltage is then increased in steps of 400V, with a range of 2KV, and spectra obtained at each step. If this test fails to give a good focus, a contingency test is also given. This program will result in an instruction flow change to the detector high voltage setting, the x-pitch value, the y-pitch value, and possibly the trim current value. Changed 9/5/89 to match Implementation Plan. A "dummy" target was added on 10/6 to allow it to go through TRANS- FORMATION. Changed 12/6/89 to reflect implementation request.

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