Werner Ricken

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The timing of the last maximum extent of the Antarctic ice sheets relative to those in the Northern Hemisphere remains poorly understood. We develop a chronology for the Weddell Sea sector of the East Antarctic Ice Sheet that, combined with ages from other Antarctic ice-sheet sectors, indicates that the advance to and retreat from their maximum extent was(More)
For most beam parameters the stored current is monitored by a commercially available dc-transformer offering a dynamic range from 1 μA to 20 A maximum. Its bandwidth of 10 kHz allows determination of the beam lifetime with ms time resolution. But it is known, that these types of transformers have severe problems by a high current bunched beam passage [1].(More)
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