AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
CARME
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Wed Oct 1 19:19:02 2025
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> > 12.46 DAQ continues G22-88/R10_14 > > c. 20MeV 16O2+ + 4He > > DSSSD bias OK - attachment 1 > ambient temperature 17.7 deg C ( c. 1deg C increase cf. earlier this week ) > > FEE64 temperatures OK - attachment 2 > > All system wide checks OK > WR timestamp control OK - attachment 3 > > ADC data item stats - attachment 4 > FEE64 rates c. 0Hz except 'hot' channels aida01 ( 71k ) and aida15 ( 8k ) > > per FEE64 Rate and Stat spectra - attachments 5-8 > events ( beam? ) aida01 asic #4 and aida04 asic #4 ( c. 200k per ASIC channel ) > > per FEE64 1.8.L spectra - attachments 9-10 > most spectra showing background and, possibly, a small amount of scattered beam? > > per FEE64 1.8.W spectra - 20us FSR - attachments 11-12 > > aida04 3*L and 4*L spectra - attachments 13-15 > distribution by strip # - uniform across asic# #4, continuing across asic #3 with abrupt fall off c. channel 9 > not Rutherford - more consistent halo/beam scattering? > what are the current lab angles subtended by the DSSSDs? > > Rutherford cross section for 20MeV 16O+4He > > > > Reaction: 4He(16O,16O)4He > > A: 4 16 16 4 > Z: 2 8 8 2 > Mass(amu): 4.002603 15.994915 15.994915 4.002603 > Error(keV): 0.001 0.002 0.002 0.001 > Origin: > Status: > > Projectile lab energy: 20.000 MeV > CM energy: 4.003 MeV > > Particle 3 Particle 4 > ( scattered ) ( recoil ) > > Lab Cross Section CM Lab/CM Lab Lab Lab > Angle Lab CM Angle Ratio Energy Angle Energy > (deg) (mb/sr) (deg) (MeV) (deg) (MeV) > > 0.00 NaN Inf 0.000 NaN 20.000 90.000 0.000 > 1.00 0.143028E+09 0.572301E+07 4.999 0.040 19.976 87.500 0.024 > 2.00 0.894079E+07 356425. 10.017 0.040 19.902 84.992 0.098 > 3.00 0.176669E+07 69982.6 15.072 0.040 19.780 82.464 0.220 > 4.00 559329. 21951.4 20.186 0.039 19.607 79.907 0.393 > 5.00 229335. 8887.05 25.382 0.039 19.382 77.309 0.618 > 6.00 110782. 4221.76 30.690 0.038 19.103 74.655 0.897 > 7.00 59959.1 2235.75 36.144 0.037 18.768 71.928 1.232 > 8.00 35299.6 1279.52 41.790 0.036 18.371 69.105 1.629 > 9.00 22192.2 775.052 47.692 0.035 17.907 66.154 2.093 > 10.00 14729.2 489.347 53.941 0.033 17.366 63.029 2.634 > 11.00 10261.1 317.919 60.685 0.031 16.732 59.658 3.268 > 12.00 7514.20 209.725 68.185 0.028 15.976 55.907 4.024 > 13.00 5900.47 137.756 77.018 0.023 15.035 51.491 4.965 > 14.00 5693.43 85.2271 89.184 0.015 13.688 45.408 6.312 > > Maximum lab scattering angle ( 14.49 deg ) exceeded > > ________________________________________________________________________________ > > > > aida01 4*L spectra - attachments 19-23 > channels 0-8 - high stats structure(s) at low energy > channels 9-16 - high energy peak cf. aida04 asic #4 spectra > > Merger, Merger stats, TapeServer - attachments 16-18 > > Started Run 11 with beam ON. > > We observe the same pattern of counts in DSSD0 (Top left detector) but not in DSSD1,2,3 (attachment 25). Moving in the left arm with the pneumatic we see a large drop in > the rate on DSSD0 to essentially zero. The beam on the CRYRING monitor appears to disappear. > When we move the right pneumatic IN, we observe an increase in the number of counts in the bottom-left part of the detector. The position is likely to be a mistake in the > strip assignment. > No increase observed in the leakage current. Will try systematically tomorrow. > > Beam position monitoring from the CRYRING are shown in attachments 25-27
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