isotopes run: 110Sn27+ radioactive; 112, 118Sn stable
(not accelerated)
also delivered stable 27Al and
39K to the experiment after failing 9-gap resonator
yields:
110Sn
2.5E8/uC, 110In >1E7/uC 110mIn 1-2E7/uC
15-30
minutes before it comes into saturation. -REX
breeding time: 98 ms for 110Sn27+
efficiencies:
Trap 44% (110Sn)
(45% for 112Sn)
EBIS 8-10% for
110 pA of 110Sn+ into trap
(8-16% for 112Sn)
(9.5 to 11.5% for stable 138Ba30+)
Linac 70-80% ??
current after trap and ebis:
110
pA at injection plate trap, 48 pA out of trap and 115 (100-140) pA
after EBIS; depending
on
number of protons
technical problems:
200 MHz amplifier broke ->
had to run at a lower energy
fluctuating ebeam current;
between 150 and 220 mA, correlated with the cathode heating power
comments:
Had
to decrease the number of protons to 700E10 per pulse.
Used 139La+ and
138Ba+ for stable beam setup.
At
least a factor 10 less In than Sn
lesson:
target characterised by the target section before