The QE chamber allows the user to measure the quantum efficiency of
CCID-17 devices. The chamber provides a steady flux of X-rays incident on
two CCDs, which lie on a translation stage. Thus, one test CCD can be
cross-calibrated against a reference CCD.
This is a grating spectrometer which operates in the
low energy X-ray band, from 250 eV and up to approximately 2.5 keV.
Allows to measure the energy resolution and the linearity of the CCD
response in the specified range. Also makes it possible to detect a near-edge
absorption structure in the CCD response around the Oxigen K absorption
The In-Focus Monochrometer is based on a new grazing incidence focusing condition.
New technologies allow a new degree of freedom and it eliminates defocsig at every
wavelength, gives symmetrical line shapes, and provides a physically compact
As part of the calibration instrumentation used to test
and characterized CCD's for the ACIS system, MIT is using a solid
state spectrometer (SSS) as a reference detector for quantum
efficiency measurements in the range from 3 keV to 10+ keV. The
detector is a lithium-drifted silicon crystal, or "Si(Li)" detector,
manufactured by Princeton Gamma Tech, Inc. (PGT).
This is the most important equipment in our lab. Without this,
no one can operate at best condition.