design of beam line for ion transport at low energies and the ejection of specific ions from...
TRANSCRIPT
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
Cr
rrV
r
rrE
rr
ebeamo
L
ebeamo
L
ebeam
2
2
2
2)(
2)(
Cr
rV
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