title: Shaping of intense ion beams into hollow cylindrical form
abstract: 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.
authors.affiliation: GSI Darmstadt mbH, Planckstrasse 1, 64291 Darmstadt, Germany.
authors.initials: U
authors.lastname: Neuner
authors.initials: R
authors.lastname: Bock
authors.initials: M
authors.lastname: Roth
authors.initials: P
authors.lastname: Spiller
authors.initials: C
authors.lastname: Constantin
authors.initials: UN
authors.lastname: Funk
authors.initials: M
authors.lastname: Geissel
authors.initials: S
authors.lastname: Hakuli
authors.initials: DH
authors.lastname: Hoffmann
authors.initials: J
authors.lastname: Jacoby
authors.initials: A
authors.lastname: Kozyreva
authors.initials: NA
authors.lastname: Tahir
authors.initials: S
authors.lastname: Udrea
authors.initials: D
authors.lastname: Varentsov
authors.initials: A
authors.lastname: Tauschwitz