Design of Beam Line for Ion Transport at Low Energies and The

Ejection of Specific Ions From Electron Beam

Brice Cannon†**

Research Advisor (s): Fredrik Wenander **, Anna Gustafsson**Supervisor: Alexander Herlert**

CERN**,Norfolk State University†

Introduction

• ISOLDE• REX-ISOLDE

– Beam Line• EBIS

– RF-Field• Conclusion• Experiences

ISOLDE & REX-ISOLDE

Initial Beam Line

Ions from REX-EBIS

Ions to WITCH

Ions from REX-EBIS

2.96m

1.56 m

Emittance: Initial Design

Final Beam lineIons from REX-EBIS

Ions to WITCH

Ions from REX-EBIS

1.56 m

2.96m

Emittance: Final Design

Original vs. Final Design

Design of Beam Line for Ion Transport at Low Energies

and The Ejection of Specific Ions From

Electron BeamBrice Cannon†**

Research Advisor(s): Fredrik Wenander **, Anna Gustafsson**Supervisor: Alexander Herlert**

CERN**,Norfolk State University†

Electron Beam Ion Source

• Maximum efficiency is ~25%– Charge state distribution

• Eject ions from electron beam – Orbit around beam

• Higher efficiency

1+ xn+

A/q

A/q

6+

4+

2+

1+

1+

4+

Electron Beam Potential

Direction of Electron Beam

-490 V

0 V

CrrrV

rrrE

rr

ebeamo

L

ebeamo

L

ebeam

2

2

2

2)(

2)(

CrrV

rrE

rr

o

L

o

L

ebeam

2||ln)(

2)(

Results of EBIS RF-FieldAngular velocity of 15 rad/µsecRF voltage of 250 V16O

10 cm1+2+

4+

8+

Conclusion• 100% transmission for beam line to

WITCH experiment– Further development of the beam line

and construction

• All components of the EBIS simulation with RF-field are complete individually– Implement the EBIS with RF-field into

different program and test

Experiences

Questions