Space Telescope Science Institute   4.3.7 Charge Transfer Efficiency  4.4.1 MAMA Properties

4.3.8 UV Light and the HRC CCD


In the optical, each photon generates a single electron. However, in the near UV, shortward of ~3200 Å there is a finite probability of creating more than one electron per UV photon (see Christensen, O., J. App. Phys. 47,689, 1976). At room temperature the theoretical quantum yield (i.e., the number of electrons generated for a photon of energy E > 3.5eV (~3500 Å)), is Ne = E(eV)/3.65. The HRC CCDs quantum efficiency curve has not been corrected for this effect. The interested reader may wish to see the STIS Instrument Handbook for details on the signal-to-noise treatment for the STIS CCDs.


 4.3.7 Charge Transfer Efficiency  4.4.1 MAMA Properties
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