an introduction to ion-optics
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
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An Introduction toAn Introduction to
Ion-OpticsIon-Optics
Series of Five LecturesJINA, University of Notre DameSept. 30 – Dec. 9, 2005
Georg P. Berg
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The LectureThe LectureSeriesSeries
11stst Lecture: 9/30/05, 2:00 pm: Definitions, Formalism, Examples Lecture: 9/30/05, 2:00 pm: Definitions, Formalism, Examples
22ndnd Lecture: 10/7/05, 2:00 pm: Ion-optical elements, properties & design Lecture: 10/7/05, 2:00 pm: Ion-optical elements, properties & design
33rdrd Lecture: 10/14/05, 2:00 pm: Real World Ion-optical Systems Lecture: 10/14/05, 2:00 pm: Real World Ion-optical Systems
44thth Lecture: 12/2/05, 2:00 pm: Separator Systems, Part 1 Lecture: 12/2/05, 2:00 pm: Separator Systems, Part 1
55thth Lecture: 12/9/05, 2:00 pm: Separator Systems, Part 2 Lecture: 12/9/05, 2:00 pm: Separator Systems, Part 2
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44thth Lecture Lecture
• 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)
44thth Lecture: 12/2/05, 2:00 pm Lecture: 12/2/05, 2:00 pmSeparator Systems, Part 1 Separator Systems, Part 1
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Solar EclipseSolar EclipseCoronagraphCoronagraph
Solar Eclipse 1999Shadow of moon of Earth SOHO, large angle
Observing faint radiation near the sun:Observing faint radiation near the sun:
An analogy for observing nuclear An analogy for observing nuclear particles close to the beamparticles close to the beam
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The Chromosphere The Chromosphere of the Sun in Hof the Sun in H
Hline, = 656.28nm
= 0.07nm Narrow Band Filter
Magnetic & Electric Separation in a Dipole FieldMagnetic & Electric Separation in a Dipole Field
(1) Felec = qE
Fmagn = qvB
(1a)
(1b)
Fcentr = mv2/Centripetal Force
T = mv2/Kinetic Energy (non-
relativistic)
(28)
(29)
= mv/qMagnetic
rigidity = mv2/qElectric rigidity
Observing close to the BeamObserving close to the Beam
Magnetic and Electric Separation in a Dipole FieldMagnetic and Electric Separation in a Dipole Field
(32)
(31)
(30)
Magnetic Separation: FMagnetic Separation: Fmagnmagn = F = Fcentrcentr
m/q = C1 (T/q ) –1 with C1 = (B)/2
Electric Separation: FElectric Separation: Felecelec = F = Fcentrcentr
T/q = C2 with C2 = (E)/2
Wien Filter: FWien Filter: Felecelec = F = Fmagnmagn
m/q = C3 T/q with C3 = 2/v2
v = E/B with E (19)
Magnetic and Electric Separation in a Dipole FieldMagnetic and Electric Separation in a Dipole Field
m/q =
C 1 (T
/q )
T/q
=
C2
m/q = C3 / (T/q)
Mass/charge m/q
Energy/charge T/q>
^
Ref: D. Catana et al, Report WP10 IDRANAP 15-01/2001
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Magnetic (BMagnetic (B Separation Separation
of Beam & Reaction Productsof Beam & Reaction Products
in Spectrometer Experiments in Spectrometer Experiments
near 0 near 0oo
K600, Grand Raiden Spectrometers:
(3He,t), (p,t), (,’), (p,p’), (,8He)
Special Faraday cups to stop beam
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K600 K600 SpectrometerSpectrometer
(IUCF)(IUCF)
The K600 is shown in0o Transmission modefor inelastic scatteringat 0o
High Dispersion PlaneB(D1) > B(D2)
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Grand Raiden High Resolution SpectrometerGrand Raiden High Resolution Spectrometer
Dipole for in- plane spin component
Faraday cup for (3He,t): B(t) ~ 2*B(3He) (p,t): B(t) ~ 1.7*B(t)
←
←
Grand Raiden is shown in0o Transmission modefor reactions at 0o
Reaction Products 6He, 8He, t
Faraday cupfor (,8He,), or ,6He,) B(6,8He) ~ 1.1 – 1.25 B()
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Preview 5Preview 5thth Lecture Lecture
• A “no-field” separation method: the Wedge • Gas-filled separators • Fragment separator, inverse kinematics, TRImP• Recoil separators• St. George
Preview:
55thth Lecture: 12/9/05, 2:00 pm Lecture: 12/9/05, 2:00 pmSeparator Systems, Part 2 Separator Systems, Part 2