Shaping of intense ion beams into hollow cylindrical form
A specifically tailored plasma lens could shape a high-energy, heavy-ion beam into the form of a hollow cylinder without loss of beam intensity. It has been experimentally confirmed that both a positive as well as a negative radial gradient of the current density in the active plasma lens can be the underlying principle. Calculations were performed that yield the ideal current density distribution for both cases. A numerical simulation of an experiment with an intense ion beam highlights that the shaping of the beam increases the achievable compression in a lead sample.
Neuner
U
GSI Darmstadt mbH, Planckstrasse 1, 64291 Darmstadt, Germany.
Bock
R
Roth
M
Spiller
P
Constantin
C
Funk
UN
Geissel
M
Hakuli
S
Hoffmann
DH
Jacoby
J
Kozyreva
A
Tahir
NA
Udrea
S
Varentsov
D
Tauschwitz
A