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Can we re-use existing magnets to build a 350(450) keV beam line?

Can we re-use existing magnets to build a 350(450) keV beam line?. 15 deg dipole. DS Y-Chamber Bend Magnet. “DS” magnet is cosine -theta design to provide uniform current density (pure dipole field) from windings (no iron). 32709-C-0358. Spare (DS002?). First Design (DS001?).

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Can we re-use existing magnets to build a 350(450) keV beam line?

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  1. Can we re-use existing magnets to build a 350(450) keV beam line?

  2. 15 deg dipole

  3. DS Y-Chamber Bend Magnet “DS” magnet is cosine-theta design to provide uniform current density (pure dipole field) from windings (no iron). 32709-C-0358 Spare (DS002?) First Design (DS001?) CEBAF (DS003) Test Cave (DS004)

  4. DS Operational Values Ampacity = Current wire can reasonably carry Cooling = Rule of Jay, 5 A/mm2 (but, might be too warm near gun) • DS002: Test temperature and voltage to 6A • DS005: Propose new set of windings using AWG16 on DS001 fixture

  5. Solenoids Focal length half of solenoid spacing (=1.5m): Spin rotation can be chosen independently: g = 2.002319304361(53)

  6. Single Coil = Single Wound = SW

  7. Two Coils = Counter Wound = CW Note: Only enough shells to build 5 solenoids Found spare FD (chopping aperture) coils and what looks to be another FA for chopping cavity (red)

  8. Solenoid Operational Values • FH: Should work at 3A. Test for saturation. Pick new limit. Remap. • FB: Should work fine. Work horse magnet. • FA: Have many, but less turns & center plate more likely to saturate • FQ: Have 4, can assemble more. Test/model for saturation. Pick new limit. Remap.

  9. CEBAF Wien Filter Spin precesses about B-field: Lorentz force is zero when:

  10. Operational Values • Build 3rd Wien filter like the others provides 30-40 deg of spin rotation • Using 35 deg allows Pz = (0.82-1)P and Px = (0-0.57)P. • Testing for higher B field (temp, saturation) and E field (gradient) possible.

  11. Spectrometer Assuming beam width 3mm and spectrometer arm 1m a 35 deg bend achieves 0.5% momentum resolution Angle >35 deg • We need a iron core dipole which provides 1700 G-cm • “Red” dipoles provide e.g. >4000 G-cm/A

  12. Summary 15 DEG BEND • DS002: Test temperature and voltage up to 5-6A • DS005: Propose new set of windings using AWG16 on DS001 fixture SOLENOIDS • FH: Should work at 3A. Test for saturation. Pick new limit. Remap. • FB: Should work fine. Work horse magnet. • FA: Have many, but less turns & center plate more likely to saturate • FQ: Have 4, can assemble more. Test/model for saturation. Pick new limit. Remap. WIEN FILTER • Build 3rd Wien filter like the others provides 30-40 deg of spin rotation • Assuming 35 deg provides Pz = (0.82-1)P and Px = (0-0.57)P. • Testing for higher B field (temp, saturation) and E field (gradient) possible. SPECTROMETER • We need a iron core dipole which provides 1700 G-cm • “Red” dipoles provide e.g. >4000 G-cm/A

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