Engineering Papers⌕ Search
Home/Archive/DOE OSTI

DOE OSTI · 3022099

Spectral Flux Measurements on SNS Direct Geometry Spectrometers at IRP-2 End-of-Life

Iverson, Erik B. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:000000027920705X)·Frost, Matthew [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:000000016821170X)
View original source ↗Read source document ↗Export metadata ↓

Abstract

The Inner Reflector Plug (IRP) of the Spallation Neutron Source (SNS) was replaced during the SNS shutdown period beginning 25 November 2025. This IRP, IRP-2, was first placed in service in May 2018, and was in use for 42.5 GW-hrs of operation, somewhat longer than its original design life of 30 GW-hrs, or even a refined estimate of 33 GW-hrs for the water moderator poison plate and 39 GW-hrs on the decoupled-poisoned hydrogen moderator decoupler (Gallmeier, Lu, and Iverson 2018). The time-integrated power history for IRP-2 is tracked in Figure 1.

Explore related subjects

43 PARTICLE ACCELERATORS

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Iverson, Erik B. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:000000027920705X), Frost, Matthew [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:000000016821170X). 2026-03-01. Spectral Flux Measurements on SNS Direct Geometry Spectrometers at IRP-2 End-of-Life. https://doi.org/10.2172/3022099

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related reports

DOE OSTI2027

Design and Integration of High Precision Superconducting Magnet Power Supply Systems

This paper reviews the design and integration approach being taken to power more than 400 superconducting magnets in Electron Ion Collider (EIC) by power supplies ranging from 20V to 400V and 100A to 18kA. A major challenge is to integrate existing legacy power supplies with new high current systems and maximize performance and reduce costs. Successful implementation requires coordinated integration of power convertors, current regulation, quench protection, energy extraction, machine protection, controls and existing accelerator infrastructure.

43 PARTICLE ACCELERATORS↗
DOE OSTI2026

Searching for the Most Harmful Field Errors in the HSR IR Superconducting Magnets

In this project, we improve beam stability for the Electron-Ion Collider. Magnetic field errors can reduce beam stability, making it essential to identify the field errors that have the greatest impact on accelerator performance. However, this is particularly challenging because beam stability depends on the complex interactions of many magnetic field errors, resulting in a high-dimensional and nonlinear optimization problem. We determine which field errors are the most influential for the large physical aperture superconducting magnet B2PF, a critical magnet in the Interaction Region (IR) in the Hadron Storage Ring (HSR). We complete and analyze nearly 30,000 simulations on the Brookhaven National Laboratory Linux Cluster by varying 18 nonlinear magnetic field errors. We evaluate beam stability using the dynamic aperture and the tune diffusion. We identify the field errors that most strongly influence beam stability and establish quantitative field error tolerances that improve accelerator performance.

43 PARTICLE ACCELERATORS↗