"Polarised Positron Source"
Efficient production of polarised positrons can be achieved using a helical undulator based system, where circularly polarised photons (~10MeV) generated from a high-energy electron beam in the undulator produce longitudinally polarised electron-positron pairs in a thin target. While a conceptual design of a non-polarised (planar undulator) based source exists, critical R&D for both polarised and non-polarised sources still remains. Specifically: complete design of the undulator; design of the spin rotation and spin flipper systems; design of the photon collimator and conversion target; optimisation of system parameters to achieve maximum polarisation and positron yields; understanding of the systematic polarisation errors; engineering design and full simulation of the system; location and performance specifications of the required diagnostics (low-energy polarimeter).
- What are the goals of this R&D project. How does this R&D project address the needs of one or more of the detector concepts?
- If there are multiple institutions participating in this project, please describe the distribution of responsibilities.
- Are there significant recent results?
- What are the plans for the near future(about 1 year)? What are the plans on a time scale of 2 to 3 years?
- Are there critical items that must be addressed before significant results can be obtained from this project?
- Is the support for this project sufficient? Are there significant improvements that could be made with additional support?
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Topic revision: 13 Oct 2005, DanPeterson
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