FOS Cycle 6: Focus, X-Pitch and Y-Pitch

Details FOS Cycle 6: Focus, X-Pitch and Y-Pitch FOS Cycle 6: Focus, X-Pitch and Y-Pitch

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6910s&link_type=abstract

HST Proposal ID #6910

Physics

Hst Proposal Id #6910

Scientific paper

After warm-up to the nominal high voltage, the trimcurrent is set to the detector default, and the HV isset to a lower value. Spectra are then obtained withthe 0.1-PAIR aperture, G190H, and the Pt-Ne lamp. Thehigh-voltage is then varied in 200 volt increments+/-600 volts from the nominal setting with spectrataken at each setting. This will allow for optimalfocus determination. Once a optimal HV settingis determined and updates made to the PDB, a series ofspectra at three different X-Bases will be made todetermine the corresponding X-Pitch. Additionally,measurements with the TALEDs through the 0.1-Pairaperture will be used to determine Y-Pitch.This program may result in an instruction flow changeto the detector high voltage setting, the x-pitchvalue, the y-pitch value.This program was run 3 times in Cycle 6, includingone run at the end of the Cycle. Thus, only one morerun is required close to Servicing Mission.

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