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Q7. Positron Source Recommendation

Q7. Positron Source Recommendation. Jim Clarke on behalf of John Sheppard, Masao Kuriki, Philippe Piot and all the contributors to WG3a.

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Q7. Positron Source Recommendation

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  1. Q7. Positron Source Recommendation Jim Clarke on behalf of John Sheppard, Masao Kuriki, Philippe Piot and all the contributors to WG3a

  2. After a very thorough examination of all the available information the following recommendations have beenagreed and endorsed by allthe convenors and attendees of WG3a

  3. Baseline Recommendation Helical Undulator Based Positron Source with Keep Alive System

  4. Alternative Study Recommendation Laser Compton Based Positron Source

  5. Additional Recommendation Conventional Source is a backup to the undulator based source BUT No further R & D should be carried out on the conventional source at this time

  6. Claim for Baseline Recommendation • The undulator based source offers the greatest certainty of meeting the required positron source design specification • Full details of justification will be in our report which will be available to the community shortly (in draft stage at present) • Presented here is a very brief synopsis

  7. Justification

  8. Primary e- source Beam Delivery System 5 - 100 GeV e- Bypass line Positron Linac IP 250 GeV 150 – 250 GeV e- Transfer Line Photon Collimators e+ DR Target e- Dump e- DR Helical Undulator Electron Linacs Photon Beam Dump 100 GeV 150 GeV Auxiliary e- Source Photon Target e+ pre-accelerator ~5GeV 2nd e- Source Adiabatic Matching Device Recommended Baseline Layout Undulator at end of electron main linac and with keep-alive source

  9. Baseline Recommendation • Helical Undulator Based Positron Source with Keep Alive System • Alternative Study Recommendation • Laser Compton Based Positron Source • Additional Recommendation • Conventional Source is a backup to the undulator based source but no further R & D should be carried out on the conventional source at this time • R&D proposals for Baseline & Alternative are under development and will be part of documentation

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