Hall C Steering Coils for Qweak J W

Motivation • To “lock” the beam onto target through a feedback loop. (DC lock)

Schematic saddle coils on ceramic beam pipe H coil target V coil Cavity Monitor(s)

Typical Design Parameters • coils placed on girder or farther upstream of experiment. •

Budget Item Cost (k$ CAD) Supplier Multistranded Litz cable 1. 3 New England Wire

Schedule • Finalize design 2005. • Construct/test 2006.

Slides: 6

Download presentation

Hall C Steering Coils for Qweak J. W. Martin University of Winnipeg

Motivation • To “lock” the beam onto target through a feedback loop. (DC lock) • Possibly, to induce/correct helicity-correlated beam motion. (300 Hz square wave high bandwidth) – these would likely be different sets of coils • University of Winnipeg contribution to Qweak. Corresponding increase of scope for Canadian group.

Schematic saddle coils on ceramic beam pipe H coil target V coil Cavity Monitor(s) beam Mixing Electronics Power amplifier

Typical Design Parameters • coils placed on girder or farther upstream of experiment. • provide beam motion below 1 mm at target • saddle coils typ. 10 m. A-turns. • minimize self-inductance (typ < 0. 1 H) thanks to Litz wire. • bandwidth into 10 k. Hz range.

Budget Item Cost (k$ CAD) Supplier Multistranded Litz cable 1. 3 New England Wire Co. Ceramic beam pipe 3. 8 Ceram. Tec North America Coil mechanics 1. 3 built by UWinnipeg Control Electronics - built by JLab High-Bandwidth Amplifier - built by JLab Med-Bandwidth Audio Amp 12. 8 Copley Controls Corporation Box and Isolated Power 2. 5 various/home built - provided by JLab Fiber Optic Control System Gaussmeter/flux gate 6. 4 Total 28. 1 GMW • J. W. Martin Discovery Grant (NSERC) funded April 1, 2005. • JLab contributions, expertise (C. Yan, R. Carlini)

Schedule • Finalize design 2005. • Construct/test 2006.