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Please visit the DXP Mercury Software page for brief descriptions and screen shots or use the links below to download:
Get the
latest Mercury Prospect release
Prospect releases are now accessible via the XIA Wiki Release page.
Get the
latest Mercury Handel driver release
Handel releases are now accessible via the XIA Wiki Release page.
Firmware for the Mercury is included with the Prospect installation
Get the
latest Mercury Prospect release
Prospect releases are now accessible via the XIA Wiki Release page.
CHELSI: A PORTABLE NEUTRON SPECTROMETER
FOR THE 20- 800 MEV REGION
T.D. McLean, R.H. Olsher, L.L. Romero, L.H. Miles, R.T.Devine, A. Fallu-Labruyere,
P. Grudberg
(PDF format, 491 KB in size)
ABSTRACT: CHELSI is a CsI-based portable spectrometer being developed at Los Alamos National Laboratory for use in highenergy
neutron fields. Based on the inherent pulse shape discrimination properties of CsI(Tl), the instrument flags
charged particle events produced via neutron-induced spallation events. Scintillation events are processed in real time
using digital signal processing and a conservative estimate of neutron dose rate is made based on the charged particle
energy distribution. A more accurate dose estimate can be made by unfolding the 2D charged particle versus pulse height
distribution to reveal the incident neutron spectrum from which dose is readily obtained. A prototype probe has been
assembled and data collected in quasi-monoenergetic fields at the The Svedberg Laboratory (TSL) in Uppsala as well as
at the Los Alamos Neutron Science Center (LANSCE). Preliminary efforts at deconvoluting the shape/energy data using
empirical response functions derived from time-of-flight measurements are described.
Towards Digital Gamma-Ray and Particle
Spectroscopy
W. Skulski, M.Momayezi, B.Hubbard-Nelson, P.Grudberg, J.Harris, W.Warburton
(PDF format, 237 KB, 10/4/1999)
Abstract: Digital spectroscopy is an experimental technique
for directly processing detector signals without analog signal shaping.
Digital spectrometers capture the detailed shape of preamplifier signals
with high speed ADCs, and then process captured waveforms in real
time with field--programmable gate arrays and digital signal processors,
that perform digitally all essential data processing functions, including
precise energy measurement and event timing, ballistic deficit correction,
pulse shape analysis, and time stamping the output data for offline
analysis. Applications of this novel technology include position sensitive
gamma-ray spectroscopy with arrays of Ge detectors and high-speed
particle emission spectroscopy. In both applications digital spectrometers
process signals from semiconductor detectors in order to measure the
interaction energy, time, and location within the detector volume.
Excellent energy resolution and essentially zero dead time can be
easily obtained with XIA digital spectrometer devices, even when time
separation between consecutive events in a decay chain is shorter
than 1 microsecond. These and other applications of digital spectroscopy
are at the frontier of experimental nuclear chemistry and nuclear
physics.
Digital Spectrometer For Automating
XAS Data Collection
W.K. Warburton, B. Hubbard & C. Zhou
(PDF format, 387 KB, 1999)
Abstract: Energy dispersive x-ray fluorescence is a well developed
experimental technique for studying both the atomic composition of
unknowns (fluorescence analysis) and the atomic structure of matter
at the atomic level (EXAFS). In order to assist researchers interested
in extending their capabilities with multi-element detectors, X-ray
Instrumentation Associates recently introduced the DXP- 4C which contains
4 complete channels - amplifier through MCA - of electronics in a
single width CAMAC module. Using these new electronics can improve
throughput considerably, compared to either an conventional analog
SCA system or a multiplexed MCA system, while also allowing complete
computer control of all parameters. This new module allows even detector
arrays with large numbers of elements to be instrumented very compactly.
The paper describes both the architecture of the DXP electronics and
its various applications.
Time Resolved XAS Data Collection
With an XIA DXP-4T Spectrometer
W.K. Warburton, B. Hubbard, C. Zhou & C. Booth
(PDF format, 82 KB, 1999)
Abstract: Time resolved experiments can be divided into two
categories: single shot experiments and cyclically repetitive experiments.
The former can only be carried out once per sample, the experiment
typically either destroys the sample or transforms it into a new state
from which it is difficult to return to the original. Chemical reactions
often fall into this category. Cyclically repetitive experiments,
on the other hand, are carried out on materials can be returned to
their starting state, allowing the experiment to be repeated as often
as necessary to collect data of interest. Many mechanical, electrical,
and phase equilibrium experiments fall into this category. Biological
systems may fall into either category. The DXP-4T, a recently introduced,
modified version of the DXP-4C Digital X-ray Spectrometer, can be
applied to XAS studies of either class of cyclically repetitive experiment.
The paper discusses time-resolved XAS research opportunities with
XIA's DXP-4T digital X-ray spectrometer.
Our publications and notes can be downloaded in
the Portable Document Format (PDF) from the XIA's Internet site www.xia.com.
In order to request printed copies, please send an e-mail to  ,
or please call the company directly. XIA's full contact information
can be found on the contact page www.xia.com/contact.html.
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