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An Introduction to Ion-Optics

An Introduction to Ion-Optics. Series of Five Lectures JINA, University of Notre Dame Sept. 30 – Dec. 9, 2005 Georg P. Berg. The Lecture Series. 1 st Lecture: 9/30/05, 2:00 pm: Definitions, Formalism, Examples. 2 nd Lecture: 10/7/05, 2:00 pm: Ion-optical elements, properties & design.

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An Introduction to Ion-Optics

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  1. An Introduction toIon-Optics Series of Five Lectures JINA, University of Notre Dame Sept. 30 – Dec. 9, 2005 Georg P. Berg

  2. The LectureSeries 1st Lecture: 9/30/05, 2:00 pm: Definitions, Formalism, Examples 2nd Lecture: 10/7/05, 2:00 pm: Ion-optical elements, properties & design 3rd Lecture: 10/14/05, 2:00 pm: Real World Ion-optical Systems 4th Lecture: 12/2/05, 2:00 pm: Separator Systems, Part 1 5th Lecture: 12/9/05, 2:00 pm: Separator Systems, Part 2

  3. 4th Lecture 4th Lecture: 12/2/05, 2:00 pm Separator Systems, Part 1 • Faint radiation near the sun – an analogy (4 – 5) • Concept of magnetic & electric separation (6 – 8) • Magnetic separation in 0o experiments in spectrometers (9 – 11) • Preview Lecture 5 (12)

  4. Observing faint radiation near the sun: An analogy for observing nuclear particles close to the beam Solar EclipseCoronagraph Solar Eclipse 1999 Shadow of moon of Earth SOHO, large angle

  5. The Chromosphere of the Sun in Ha Ha line, l = 656.28nm Dl = 0.07nm Narrow Band Filter

  6. Observing close to the Beam Magnetic & Electric Separation in a Dipole Field Felec = qE (1a) (1) Fmagn = qvB (1b) Fcentr = mv2/r, Centripetal Force (28) T = mv2/2, Kinetic Energy (non-relativistic) (29) Br= mv/q, Magnetic rigidity Er= mv2/q, Electric rigidity

  7. Magnetic and Electric Separation in a Dipole Field Magnetic Separation: Fmagn = Fcentr m/q = C1 (T/q ) –1 with C1 = (Br)/2 (30) Electric Separation: Felec = Fcentr (31) T/q = C2 with C2 = (Er)/2 Wien Filter: Felec = Fmagn (19) v = E/B with E ^ B m/q = C3 T/q with C3 = 2/v2 (32)

  8. Magnetic and Electric Separation in a Dipole Field Mass/charge m/q T/q = C2 ^ m/q = C1 (T/q ) m/q = C3 / (T/q) Energy/charge T/q > Ref: D. Catana et al, Report WP10 IDRANAP 15-01/2001

  9. Magnetic (Br) Separationof Beam & Reaction Products in Spectrometer Experiments near 0o K600, Grand Raiden Spectrometers: (3He,t), (p,t), (a,a’), (p,p’), (a,8He) Special Faraday cups to stop beam

  10. K600 Spectrometer(IUCF) The K600 is shown in 0o Transmission mode for inelastic scattering at 0o High Dispersion Plane B(D1) > B(D2)

  11. Grand Raiden High Resolution Spectrometer Grand Raiden is shown in 0o Transmission mode for reactions at 0o ← Faraday cup for (3He,t): Br(t) ~ 2*Br(3He) (p,t): Br(t) ~ 1.7*Br(t) ← Faraday cup for (a,8He,), or a,6He,) Br(6,8He) ~ 1.1 – 1.25 Br(a) Dipole for in- plane spin component Reaction Products 6He, 8He, t

  12. Preview 5th Lecture 5th Lecture: 12/9/05, 2:00 pm Separator Systems, Part 2 Preview: • A “no-field” separation method: the Wedge • Gas-filled separators • Fragment separator, inverse kinematics, TRImP • Recoil separators • St. George

  13. End Lecture 4

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