Development of a high intensity 48Ca ion beam for the heavy element program

Wutte, Daniela ; Leitner, Mattheus ; Lyneis, Claude

Lawrence Berkeley National Laboratory

关键词: Ion Sources;    Pumping;    43 Particle Accelerators;    Cyclotrons;    Ion Beams;   

DOI  :  10.2172/803871
RP-ID  :  LBNL--51554
RP-ID  :  AC03-76SF00098
RP-ID  :  803871

美国|英语

来源: UNT Digital Library

【 摘 要 】

A high intensity {sup 48}Ca ion beam has been developed at the 88 Inch Cyclotron for the synthesis of {sup 283}112 using the reaction {sup 238}U({sup 48}Ca, 3n). An ion beam intensity of {approx} 700 pnA was delivered on target, resulting in a total dose of 2 x 10{sup 18} ions over a six day period. Since {sup 48}Ca is a very expensive and rare isotope minimal consumption is essential. Therefore a new oven [1] and special tantalum liner [2] have been developed for the AECR-U ion source during the last year to improve the metal ion beam efficiency. Both the LBL ECR and the AECR-U ion sources are built with radial access. Six radial slots between the sextupole magnet bars provide additional pumping and easy access to the plasma chamber for ovens and feedthroughs. Two types of radial ovens have been used at LBNL in the past, operating at temperatures up to 2100 C.