Synchrotron-based high-pressure research in materials science Page: 4 of 8
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0.9-3.6 GeV RLA
Linac to 0.9 GeV
3.6-12.6 GeV RLA
25-50 GeV FFAG
Fig. 3: Schematic of IDS-NF baseline acceleration system.
22.214.171.124 Racetrack Ring
As suggested by the name, a racetrack ring has two long straight section that can be aimed at a single
detector site. If there are two baselines, there are two independent rings. The facility could be operated
with one muon species in each ring, with the two species interchanged periodically, or it could be
operated with both species counter-rotating in each ring. Although it is likely to be more expensive,
this configuration is very flexible compared with the triangle case (see Section 126.96.36.199), in the sense
that it can be used for two detector sites with no spatial constraints, and can be used with the full beam
even if only one detector is operating. For these reasons, it has been adopted as the IDS-NF baseline
188.8.131.52 Triangle Ring
In this configuration , two rings would be stacked side-by-side in a single tunnel, with one ring
storing each muon sign. A typical layout is shown in Fig. 4. Two detectors can be illuminated with
interleaved trains of positive and negative muon decay products. In terms of the percentage of
circumference available for decays, the triangle ring is somewhat more efficient than the racetrack
design. However, its geometry constrains the locations of the two baselines. If the two sites are in the
same direction from the ring, or if only a single site is used, the racetrack is preferred.
Fig. 4: Schematic of NF triangle ring.
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Chen, Bin; Lin, Jung-Fu; Chen, Jiuhua; Zhang, Hengzhong & Zeng, Qiaoshi. Synchrotron-based high-pressure research in materials science, article, June 1, 2016; (digital.library.unt.edu/ark:/67531/metadc932011/m1/4/: accessed December 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.