2 Application
The primary application for the XPPS is in detector array
systems using XIA’s DXP or DGF digital signal processors, where it
provides a source of clean, low noise linear power for the detector’s
preamplifiers. For synchrotron applications, the XPPS is intended to be
mounted in the x-ray hutch, close to the detector, along with the
processing electronics. This provides the following benefits. First, it
controls ground loops, which might arise if the DXP’s and
preamplifiers were powered from separate sources. Because the DXP
input signal is referenced to its local power supply ground, such ground
loop noise appears directly superimposed on the preamplifiers’ signals
and can seriously degrade energy resolution. Second, it allows the PXI
chassis (or CAMAC crate) containing the DXP’s or DGF’s to be placed
in close proximity to the detector array. This often allows the signal
cables from the preamplifiers to the DXP’s to be greatly shortened,
which in turn can significantly reduce their noise pickup from the
environment. This is particularly important in digitally noisy
environments or in the presence of strong radio-frequency signals, such
as in synchrotron applications. In the latter case, the PXI chassis can be
placed in the hutch and only digital control and data signals being sent
to the external control computer system.
To Next Page
Loading...
General