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Describe helicity magnet (HM) system

Helicity Magnet Usage for Optics Measurements 9/27/05 – Chao, Grames. Describe helicity magnet (HM) system Con’s of PZT’s & Pro’s of HM–type system for BT measurements Other Possibilities, Comments from BT & Planning. Helicity Magnet System.

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Describe helicity magnet (HM) system

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  1. Helicity Magnet Usage for Optics Measurements 9/27/05 – Chao, Grames • Describe helicity magnet (HM) system • Con’s of PZT’s & Pro’s of HM–type system for BT measurements • Other Possibilities, Comments from BT & Planning

  2. Helicity Magnet System Purpose - Produce helicity correlated beam orbit (position and/or angle) for the purpose of study or feedback. • Requirements • Position and Angle -> 2 H and 2 V magnets • Mimic Helicity Pattern -> Litz wire high bandwidth magnets customized power supplies • Suitable dyanmic range -> Exceed Du, Du’ at injector + suited @ 5 MeV • Uncorrelated w/ charge asymmetry -> Downstream of apertures • Zero cross-talk -> Electrically isolated system, fiber optic controls • History • Idea scoffed at prior to 2003, but proposal considered during G0 prep. • Working group formed (Areti, Cumbia, Dickson, Flood, Grames) • Design + Review + Hurried Installation -> Not used by G0/HAPPEX (2004) • Improvements & functional system (Spring, ‘05) • HAPPEX He testing (Summer ‘05) and preparation for HAPPEX-H

  3. Injector Helicity Magnet Installation (0L01-0L03) January 5-6, 2004 MHE0L03V, MHE0L03H MHE0L02H MHE0L01V 110 VAC Isolation Transformer Grounded cage containing electrically isolated helicity magnet controls (VME) Tube protecting Litz magnet wire

  4. Closer look…

  5. Con’s of PZT’s & Pro’s of HM–type system

  6. Possibilities, Comments & Planning • BT Studies – magnets can produce DC kicks (FOpt) or Large Amplitude 30 Hz orbit (C-S), may be helpful to improve Injector-Arc1 matching. • HAPPEX-He studies provide typ. performance summary (pending). • “As is” setup may be sufficient for Chao’s studies. Note: usefulness is downstream of cryo-unit, however, we may improve understanding upstream of cryo-unit as a result. • Requests to improve or evolve the system welcome -> gauge cost/benefit

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