The Manuel Lujan, Jr. Neutron Scattering Center LANSCE experiment reports 1988 run cycle: Progress report

Technical Report · Thu Jun 01 00:00:00 EDT 1989

DOI:https://doi.org/10.2172/6002054· OSTI ID:6002054

Hyer, D. K. ^[1]

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1. comp.

This year was the first in which LANSCE ran a formal user program, which is patterned after the one that exists at the Institut Laue- Langevin, Grenoble, France. A call for proposals is issued before each scheduled run cycle, and experiment proposals are submitted by scientists from universities, industry, and other research facilities around the world. An external program advisory committee, which LANSCE shares with the Intense Pulsed Neutron Source (IPNS), Argonne National Laboratory, examines the proposals and makes recommendations. Joint meetings are held where proposals for the two centers are examined at the same time. Operational issues prevented such a joint meeting in 1988, but one was scheduled prior to the 1989 run cycle. At LANSCE neutrons are produced by spallation when a pulsed, 800-MeV proton beam impinges on a tungsten target. The proton pulses are provided by the Los Alamos Meson Physics Facility (LAMPF) accelerator and an associated Proton Storage Ring (PSR), which can alter the intensity, time structure, and repetition rate of the pulses. The LAMPF protons of Line D are shared between the LANSCE target and the Weapons Neutron Research facility, which results in LANSCE spectrometers being available to external users for unclassified research about 60% of each six-month LAMPF run cycle. Classified measurements of interest to the Los Alamos National Laboratory may also be performed and may occupy up to 20% of the available beam time. These experiments are reviewed by an internal program advisory committee. One hundred two proposals were submitted for unclassified research and 12 proposals for research of a programmatic nature to the Laboratory. Oversubscription for instrument beam time by a factor of two was evident with 459 total days requested and only 242 available for allocation.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6002054
• Report Number(s): LA-11638-PR; ON: DE89014392
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATOR FACILITIES
EXPERIMENT PLANNING
PULSED NEUTRON TECHNIQUES
LASL
NEUTRON SOURCES
PROGRESS REPORT
PROTON BEAMS
TUNGSTEN
BEAMS
DOCUMENT TYPES
ELEMENTS
METALS
NATIONAL ORGANIZATIONS
NUCLEON BEAMS
PARTICLE BEAMS
PARTICLE SOURCES
PLANNING
RADIATION SOURCES
TRANSITION ELEMENTS
US AEC
US DOE
US ERDA
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430303* - Particle Accelerators- Experimental Facilities & Equipment
654003 - Radiation & Shielding Physics- Neutron Interactions with Matter