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P: Plasmaphysik
P 14: Schwerionen- und lasererzeugte Plasmen 1
P 14.7: Talk
Tuesday, March 28, 2006, 16:15–16:30, 1004
Beam Emittance Measurement and Plasma Channel Properties for Channel-based Ion Beam Transport — •Renate Knobloch-Maas1, Stephan Neff1, Andreas Tauschwitz2, and D.H.H. Hoffmann1,2 — 1TU Darmstadt, FB Physik, Schloßgartenstr. 9, 64289 Darmstadt — 2GSI, Planckstr. 1, 64291 Darmstadt
Plasma-channel-based beam transport for heavy-ion-beam-driven inertial fusion is a promising final transport concept. Measurements of channel properties and ion beam emittance after transport were conducted at GSI.
The properties of ion-beam-induced plasma channels in several gases were studied for a wide range of pressure and voltage for a channel length of 106 cm. A comparison of different background gases shows that high-Z noble gases are more suitable to create channels for beam transport than low-Z noble gases or nitrogen. Laser-induced plasma channels were also analyzed.
The results of measurements of the beam emittance behind the channel during beam transport demonstrate the feasibility of measuring beam emittance after a transport channel in a single shot. The data indicate no changes in the emittance within statistical errors.