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Persistent URL http://purl.org/net/epubs/work/39265018
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Record Id 39265018
Title Design of the muon-to-electron-conversion (Mu2e) pion production target
Abstract The report describes the preliminary design of the radiation cooled tungsten target and spoke support system, including a rationale for the concept and a description of risks. Due to the high thermal and radiation load, targets are expected to have a limited lifetime, with 1 year being the specified minimum lifetime required to limit the impact on the operation of the facility. An analysis of failure mechanisms for a radiation cooled target is used to inform the research program, and a Failure Mode and Effect Analysis is included for the specific design. The main body of the report describes the target design, thermal and mechanical analysis, prototyping and testing that has been carried out to date to optimize the proposed design, to verify the required manufacturing methods and to assess and mitigate the risks identified. The tungsten target rod is proposed to be supported by tungsten spokes tensioned by cantilever springs mounted from a titanium alloy outer ring. An outline concept is presented for a simple and easily dismountable spring system to support the target from the solenoid Heat and Radiation Shield (HRS) bore. A suggestion is made for an integral catcher tray to collect debris from a failed target. Various off-line high temperature experiments are described which were carried out to replicate as far as practicable the Mu2e operating conditions and to inform the detailed design. However, the test program was not able to address all issues of concern. The remaining issues are proposed to be studied in a future prototyping and test program as far as is practicable and within the available budget, but for example the radiation damage effects will only be evident after operation. A number of potential mitigating strategies are described to reduce operating temperatures and stresses.
Organisation TECH , STFC , TECH-HPTG
Keywords tungsten , Mu2e
Funding Information Fermilab, Mu2e target 3rd contract (C8945)
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Language English (EN)
Type Details URI(s) Local file(s) Year
Report Mu2e DocDB 8376. STFC, 2017. HPT-2017-1_Mu2eCo…Report_18Jan2017.pdf 2017