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backmari committed Dec 6, 2024
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Data Acquisition System.

SMS
Stream Management Service
Service that aggregates data from fast neutron event data and slow PVs into a data stream
available for both live monitoring and file archiving. SMS reports its status to WebMon for
system diagnostics.
Stream Management Service (SMS) is a service that aggregates data from fast neutron event data
and slow PVs into a data stream available for both live monitoring and file archiving. SMS
reports its status to WebMon for system diagnostics.

STC
Streaming Translation Client
Service that translates the experiment data stream from SMS to NeXus data file. Triggers the
post-processing workflow after the NeXus file has been created.
Streaming Translation Client (STC) is a service that translates the experiment data stream
from :term:`SMS` to a NeXus data file. Triggers the post-processing workflow after the NeXus
file has been created.

PVSD
Process Variable Streaming Daemon
Per-beamline service that subscribes to EPICS Control System PV:s and forwards PV value
changes to the SMS. PVSD reports its status to WebMon for system diagnostics.

PV
Process Variable, for example sample environment variables.
Process Variables (PVs) are variables coming from the control system and can include sample
environment variables (e.g. temperature, magnetic field), instrument geometry and experiment
metadata. Subsets of PVs are used for monitoring experiments.

ONCat
Catalog for neutron experiment data at SNS and HFIR: https://oncat.ornl.gov.
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:term:`autoreduction<Autoreduction>` can publish plots for a run to Live Data Server.

Livereduce
Service for live data monitoring of the data stream. Publishes plots to
:term:`Live Data Server`.
Service for live monitoring of the data stream for the creation of plots which are published
to the :term:`Live Data Server`.

IPTS
Experiments/runs are grouped by their Integrated Proposal Tracking System (IPTS) number.
Integrated Proposal Tracking System (IPTS) number is the experiment's proposal ID that is used
for grouping runs.

Workflow
Experiment data post-processing workflow. The available tasks are cataloging, autoreduction
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