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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

An Introduction toIon-Optics

Series of Five Lectures

JINA, University of Notre Dame

Sept. 30 – Dec. 9, 2005

Georg P. Berg


The lecture series
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


4 th lecture
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)


Solar eclipse coronagraph

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


The chromosphere of the sun in h a
The Chromosphere of the Sun in Ha

Ha line, l = 656.28nm

Dl = 0.07nm

Narrow Band Filter


Magnetic electric separation in a dipole field

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


Magnetic and electric separation in a dipole field
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)


Magnetic and electric separation in a dipole field1
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


Magnetic b r separation of beam reaction products in spectrometer experiments near 0 o
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


K600 spectrometer iucf
K600 Spectrometer(IUCF)

The K600 is shown in

0o Transmission mode

for inelastic scattering

at 0o

High Dispersion Plane

B(D1) > B(D2)


Grand raiden high resolution spectrometer
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


Preview 5 th lecture
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



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