Summary from RSVP Extinction Conferencehttp://www.agsrhichome.bnl.gov/People/kbrown/rsvp/Extinction.html

Kevin Brown

kbrown@bnl.gov

Attendees

•L.Ahrens•D.Beavis•A. Hatzikoutelis (VRVS)•K.Brown•I H. Chiang•I.Christidi•J.W.Glenn•J.Kotcher•L.Littenberg•A.Mincer•B.Morse•P.Pile•Y.Semertzidis•M.Sivertz•P.Yamin

Agenda (as followed)

1. Overview of new guidelines and floor availability P.Pile

2. Using B line for KOPIO measurements Dana Beavis

3. Some Comments on languange. K.Brown

4. KOPIO bunch width and extinction measurements M.Sivertz

5. Measuring extinction using Electo-Optical Effect Y. Semertzidis

6. Using C-Line for RSVP extinction measurements M.Sivertz, I Hung Chiang, A.Mincer

7. Pre-Extraction RSVP Extinction tests Woody Glenn

Summary

• Participants agreed there is no longer any need for studies to be done in D line. D line can be removed immediately.

• C line and LESB III are seen as low priority options for beam development studies. The preference is to have B line and A line ready in 2008 as locations to dump beam and perform studies.

• Action items: MECO: Time distribution around bunch that is tolerable for extinction. MECO: change in sensitivity when running 1 bunch instead of 2 (note

this option has a number of appealing features – and has the potential of reducing construction costs).

RSVP: language glossary – KAB RSVP: Electro-Optical effect extinction monitor – external for KOPIO, is it

feasible? (perhaps with pulsed laser). Internal for MECO- details need work.

RSVP: Both experiments need to define more clearly, and with some detail, what beam tests they need to do.

Pre-Extraction Measurements

This is a summary of Woody’s talk, which focused on MECO measurements that can be done with either no extraction or at low intensity extraction.

1. Simulations! (true for both experiments) 1. need to simulate with large amplitude particles in Longitudinal phase

space, to see what the effect of the very low synchrotron frequency particles will have.

2. simulate particles outside RF bucket and how they become populated

2. Observe how adjacent RF buckets get filled (in AGS Ring test)

3. Kick out individual bunches, and observe what is left over.

4. Use present AC-dipole to understand inter-bunch protons (what happens ?, how does the AC-dipole have to run, frequency sweep ?, etc. )

5. 8 GeV extraction – spill structure. Could extract to a W-line type of dump with polarized proton intensities.