To improve the isochronicity still in the 72Ge setting sextupoles and scrapers wer varies successfully.
1. E02DS_H -130 / 130mm - wide rect. peak
-30 / 130 - nothing
-35 / 130 - weak but broad
-70 / 130 - wider rect peak
-70 / 30 - two peaks
-70 / 10 - peak + small peak
-70 / 0 - peak + tiny peak
cannot move more than 0, back to
-70 / 50
2. E01DS_H: -130/130 - wide rectangular distribution
-40/130 - wide double structure
-35/130 - very weak, still double structure
some sectupole tuning
-40/0 - nothing
-50 / 0 - peak with right tail
cannot close outside more than 0 so try next scraper
3. E01DS3HG
-130 - peak with long right tail
-30 - nothing
-50 - peak with long right tail
-40 - weak peak with long right tail
==> no good scraper do not use
4. EEXDS2HA
-120 - peak with long right tail
-20 - peak with long right tail
0 - peak with less right tail
10 - small peak, no right tail
5 - smaller peak, no right tail
3 - smaller peak, with small right tail
8 - small peak no tail
==> good scraper use it (+8mm)
5. Try a bit more on E01DS_H
-55 / 0 - small peak no tail
-55 / 50 - same no loss in resolution
-55 /130 - same no loss in resolution
-65 /130 - same good peak, but higher intensity
-75 /130 - same good peak, but left tail
-65 /130 - same good peak, no tail
6. open E02DS_H to -130 / 130 no difference
7. again E01DS_H
-125 /130 - very wide left tail
-68 /130 - one peak
-72 /130 - one peak, samll left tail
-66 /130 - one peak, no tail
==> good scraper use it (-66mm)
8. check all other scrapers they are all open
also open TE4 slits to +/-20mm, no difference, back to +/-10 mm
9. bit more sextupole variation on the narrow line
===> only two scrapers used
picture shows result afterropimisation, the markers indicate the lines,
the left marker is for a +691 keV isomer.
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