Quoting Yury:
"The count rate is very low. We estimate that we store about 10^4 118Te particles at 10 AMeV. This is a very low number.
On Saturday we re-implemented the recoil setup (MCP from Pierre-Michelle) from the previous experiment and could verify the overlap between the stored beam and the gas-jet.
In the evening the intensity has been optimized and we are running presently with stable 1.5-2 10^9 particles extracted from the SIS. Indeed, another factor 2-3 would be great.
We had to work on the gas-jet target density which significantly dropped."
Yesterday evening we started with gas jet-denisity of ~7E13 which dropped during night to ~2E13.
We have overall on the targetON Si position histo 57 counts. Form these I estimated based on the 124Xe measurement like very roughly 21% Rutherford, 63% pn, and 6% pg counts. For the number of pg this would mean 3.4counts, I can see now like 2 (bin (6,6) and bin (6,7))
To only good news that the scraper seems to work, althought the 2 bins at (6,12) and (6,15) I don't understand now.
Also we can see some tiny peaks in the Xray spectra. The tininess can be explained due to the low number of ions in the ESR. |