Appendix A Specifications
150 Lynx II DSA User's Manual - 7096089
DUAL LOSS FREE COUNTING (LFC)
Dual Loss Free Counting (DLFC) mode allows the accumulation of a loss-free corrected
spectrum simultaneously with an uncorrected spectrum. Analysis of the two spectra
together allows more accurate quantification of the data than analysis from a single
spectrum.
Peak centroid (energy), net area, background, and counts per second are computed from
the corrected spectrum, while the uncertainty in the computed peak area is derived from
the uncorrected spectrum. This results in a better estimate of the error than if the
computation were performed using the corrected spectrum (due to the non-Poisson nature
of the corrected spectrum).
List (LIST) and Time-Stamped List (TLIST) modes
Note: The List modes (LIST and TLIST) of operation may require special engineering or
assistance for the communication libraries involved. Contact your local
representative concerning this feature. A sample program is provided with the
Software Development Kit (SDK).
ADC events are stored sequentially (similar to a list) in the Lynx II’s buffer memory in the
order received from the detector until the buffering is exhausted or read and processed by
a client application.
The Lynx II can be programmatically set to stream (or push) LIST data to listening
client(s) on a periodic basis; this method (streaming) eliminates the overhead of the
internal buffering.
All LIST and TLIST data produced by the Lynx II consist of 32-bits per event.
During LIST/TLIST acquisition, digitized energy events from the fast ADC are recorded
by the Lynx II in the order received from the detector. For LIST mode, only the energy
component of the event is stored by the Lynx II. For TLIST mode, both the energy
component and the associated time stamp for each event are recorded by the Lynx II using
1.0 µSec or 0.1 µSec clock resolution
High Voltage Power Supplies
All outputs are current limited and short-circuit protected.
HV INHIBIT INPUT – has two modes.
• POSITIVE POLARITY – For Mirion preamplifiers. Enable condition (cold
detector) is an open circuit or active high = +1.2 V to +24 V; Inhibit condition
(warm detector) is –24 V to <+1.2 V or ground.
• NEGATIVE POLARITY – For preamplifiers and LN monitors, where Enable
condition (cold detector) is –24 V to <+1.2 V; Inhibit condition (warm detector) is
open circuit or active high = +1.2 V to +24 V.
With Negative polarity selected, an open input will disable the high voltage.
To Next Page
Loading...
Need help?
General
