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Title: EPICS Controlled Collimator for Controlling Beam Sizes in HIPPO

Abstract

Controlling the beam spot size and shape in a diffraction experiment determines the probed sample volume. The HIPPO - High-Pressure-Preferred Orientation– neutron time-offlight diffractometer is located at the Lujan Neutron Scattering Center in Los Alamos National Laboratories. HIPPO characterizes microstructural parameters, such as phase composition, strains, grain size, or texture, of bulk (cm-sized) samples. In the current setup, the beam spot has a 10 mm diameter. Using a collimator, consisting of two pairs of neutron absorbing boron-nitride slabs, horizontal and vertical dimensions of a rectangular beam spot can be defined. Using the HIPPO robotic sample changer for sample motion, the collimator would enable scanning of e.g. cylindrical samples along the cylinder axis by probing slices of such samples. The project presented here describes implementation of such a collimator, in particular the motion control software. We utilized the EPICS (Experimental Physics Interface and Control System) software interface to integrate the collimator control into the HIPPO instrument control system. Using EPICS, commands are sent to commercial stepper motors that move the beam windows.

Authors:
 [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1374278
Report Number(s):
LA-UR-17-26888
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 97 MATHEMATICS AND COMPUTING

Citation Formats

Napolitano, Arthur Soriano, and Vogel, Sven C. EPICS Controlled Collimator for Controlling Beam Sizes in HIPPO. United States: N. p., 2017. Web. doi:10.2172/1374278.
Napolitano, Arthur Soriano, & Vogel, Sven C. EPICS Controlled Collimator for Controlling Beam Sizes in HIPPO. United States. doi:10.2172/1374278.
Napolitano, Arthur Soriano, and Vogel, Sven C. Thu . "EPICS Controlled Collimator for Controlling Beam Sizes in HIPPO". United States. doi:10.2172/1374278. https://www.osti.gov/servlets/purl/1374278.
@article{osti_1374278,
title = {EPICS Controlled Collimator for Controlling Beam Sizes in HIPPO},
author = {Napolitano, Arthur Soriano and Vogel, Sven C.},
abstractNote = {Controlling the beam spot size and shape in a diffraction experiment determines the probed sample volume. The HIPPO - High-Pressure-Preferred Orientation– neutron time-offlight diffractometer is located at the Lujan Neutron Scattering Center in Los Alamos National Laboratories. HIPPO characterizes microstructural parameters, such as phase composition, strains, grain size, or texture, of bulk (cm-sized) samples. In the current setup, the beam spot has a 10 mm diameter. Using a collimator, consisting of two pairs of neutron absorbing boron-nitride slabs, horizontal and vertical dimensions of a rectangular beam spot can be defined. Using the HIPPO robotic sample changer for sample motion, the collimator would enable scanning of e.g. cylindrical samples along the cylinder axis by probing slices of such samples. The project presented here describes implementation of such a collimator, in particular the motion control software. We utilized the EPICS (Experimental Physics Interface and Control System) software interface to integrate the collimator control into the HIPPO instrument control system. Using EPICS, commands are sent to commercial stepper motors that move the beam windows.},
doi = {10.2172/1374278},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Aug 03 00:00:00 EDT 2017},
month = {Thu Aug 03 00:00:00 EDT 2017}
}

Technical Report: