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
